SECOND AMENDED AND RESTATED
                                   AGREEMENT
                                      AND
                       PLAN OF REORGANIZATION AND MERGER
                                 BY AND BETWEEN
                             MID-PENINSULA BANCORP
                                      AND
                           CUPERTINO NATIONAL BANCORP
                                AUGUST 20, 1996

                          SECOND AMENDED AND RESTATED
                AGREEMENT AND PLAN OF REORGANIZATION AND MERGER
 
    THIS SECOND AMENDED AND RESTATED AGREEMENT AND PLAN OF REORGANIZATION AND
MERGER, dated as of August 20, 1996, ("Agreement"), amends and restates an
Amended and Restated Agreement and Plan of Reorganization and Merger made and
entered into as of June 26, 1996, by and between Mid-Peninsula Bancorp, a
California corporation ("Mid-Peninsula"), and Cupertino National Bancorp, a
California corporation ("Cupertino").
 
    A.  The Boards of Directors of Mid-Peninsula and Cupertino deem it advisable
and in the best interests of Mid-Peninsula, Cupertino, their subsidiaries and
their respective shareholders that Mid-Peninsula and Cupertino enter into a
business combination, with the expectation that the resulting company will
combine the best elements of both Mid-Peninsula and Cupertino. Pursuant to such
business combination, Cupertino shall merge with and into Mid-Peninsula (the
"Merger") and Mid-Peninsula will change its name to Greater Bay Bancorp
("Bancorp"). Following the Merger, Cupertino's subsidiary, Cupertino National
Bank & Trust ("CNB") and Mid-Peninsula's subsidiary, Mid-Peninsula Bank ("MPB"),
shall be wholly-owned subsidiaries of Bancorp.
 
    B.  This Agreement and the Merger Agreement attached as EXHIBIT A and
intended to be filed with the California Secretary of State (the "Merger
Agreement") have been approved by the Boards of Directors of Mid-Peninsula and
Cupertino, and the principal terms will be submitted for approval of the
shareholders of Cupertino and Mid-Peninsula at special meetings of their
respective shareholders.
 
    C.  The Merger is intended to qualify as a tax-free reorganization within
the meaning of Section 368 of the Internal Revenue Code of 1986, as amended (the
"IRC").
 
    D.  Pursuant to the Merger, each Cupertino shareholder will receive, in
exchange for each share of Cupertino common stock ("Cupertino Share" or
"Cupertino Shares"), the number of shares of Bancorp common stock ("Bancorp
Share" or "Bancorp Shares") determined in accordance with the Conversion Ratio
as more fully set forth in this Agreement and in the Merger Agreement (the
"Conversion Ratio").
 
    NOW, THEREFORE, in consideration of the premises and the mutual agreements
contained herein and in the Merger Agreement, the parties hereto agree as
follows:
 
1.  THE MERGER.
 
    1.1  EFFECTIVE DATE.  Subject to the terms and conditions of this Agreement,
the Merger shall become effective on the date ("Effective Date") and at the time
("Effective Time of the Merger") an executed copy of the Merger Agreement has
been filed with the California Secretary of State.
 
    1.2  EFFECT OF THE MERGER.  Subject to the terms and conditions of this
Agreement, at the Effective Time of the Merger, Cupertino shall be merged with
and into Mid-Peninsula and Mid-Peninsula will change its name to Greater Bay
Bancorp ("Bancorp"). All assets, rights, privileges, immunities, powers,
franchises and interests of Cupertino in and to every type of property (real,
personal and mixed) and choses in action, as they exist as of the Effective
Date, including appointments, designations and nominations and all other rights
and interests as trustee, executor, administrator, registrar of stocks and
bonds, guardian of estate, assignee, receiver and in every other fiduciary
capacity, shall pass and be transferred to and vest in Bancorp by virtue of the
Merger at the Effective Time of the Merger without any deed, conveyance or other
transfer; the separate existence of Cupertino shall cease and the corporate
existence of Mid-Peninsula (with the change of its name as described above) as
Bancorp and as a California corporation shall continue unaffected and unimpaired
by the Merger; and Bancorp shall be deemed to be the same entity as each of
Cupertino and Mid-Peninsula and shall be subject to all of their duties and
liabilities of every kind and description. Bancorp shall be responsible and
liable for all the liabilities and obligations of each of Mid-Peninsula and
Cupertino; and any claim existing or action or proceeding pending by or against
Mid-Peninsula or Cupertino may be prosecuted
 
                                       1

as if the Merger had not taken place, or Bancorp may be substituted in its
place. Neither the rights of creditors nor any liens upon the property of either
Mid-Peninsula or Cupertino shall be impaired by reason of the Merger.
 
2.  CONVERSION AND CANCELLATION OF SHARES.
 
    2.1  CONVERSION OF CUPERTINO SHARES.  At the Effective Time of the Merger,
by virtue of the Merger and without any action on the part of any holder of
Cupertino Shares, subject to Section 2.2, 2.3 and 2.5 of this Agreement, each
outstanding Cupertino Share (other than any shares as to which dissenters'
rights have been perfected) shall be converted into the right to receive .81522
Bancorp Shares (the "Conversion Ratio").
 
    2.2  FRACTIONAL SHARES.  Notwithstanding any other provision hereof, no
fractional shares of Bancorp Shares shall be issued to holders of Cupertino
Shares. In lieu thereof, each such holder entitled to a fraction of a Bancorp
Share shall receive, at the time of surrender of the certificate or certificates
representing such holder's Cupertino Shares, an amount in cash equal to the
market value per share of the Mid-Peninsula common stock ("Mid-Peninsula
Shares"), calculated (to the nearest hundredth) by taking the average of the
closing bid and asked prices quoted by each brokerage firm then acting as a
market maker of Mid-Peninsula Shares, for each of the twenty (20) consecutive
trading days up to and including the last business day of the month-end
immediately preceding the Closing Date (the "Determination Date") (whether or
not there were any trades in Mid-Peninsula Shares on such days), multiplied by
the fraction of a Bancorp Share to which such holder otherwise would be
entitled. No such holder shall be entitled to dividends, voting rights, interest
on the value of, or any other rights in respect of a fractional share.
 
    2.3  SURRENDER OF CUPERTINO SHARES.
 
        a.  Prior to the Effective Date, Mid-Peninsula shall appoint U.S. Stock
    Transfer Corporation or its successor, or any other bank or trust company
    (having capital of at least $50 million) mutually acceptable to Cupertino
    and Mid-Peninsula, as exchange agent (the "Exchange Agent") for the purpose
    of exchanging certificates representing Cupertino Shares and at and after
    the Effective Time of the Merger, Bancorp shall issue and deliver to the
    Exchange Agent such number of certificates representing Bancorp Shares and
    cash for payment of fractional shares, as shall be required to be delivered
    to holders of Cupertino Shares pursuant to Article 2 of the Merger
    Agreement. As soon as practicable after the Effective Time of the Merger,
    each holder of Cupertino Shares converted pursuant to Section 2.1, upon
    surrender to the Exchange Agent of one or more certificates for such
    Cupertino Shares for cancellation, will be entitled to receive a certificate
    or certificates representing the number of Bancorp Shares determined in
    accordance with Section 2.1 and a payment in cash with respect to fractional
    shares, if any, determined in accordance with Section 2.2.
 
        b.  No dividends or other distributions of any kind which are declared
    payable to shareholders of record of the Bancorp Shares after the Effective
    Date will be paid to persons entitled to receive such certificates for
    Bancorp Shares until such persons surrender their certificates representing
    Cupertino Shares. Upon surrender of such certificates representing Cupertino
    Shares, the holder thereof shall be paid, without interest, any dividends or
    other distributions with respect to the Bancorp Shares as to which the
    record date and payment date occurred on or after the Effective Date and on
    or before the date of surrender.
 
        c.  If any certificate for Bancorp Shares is to be issued in a name
    other than that in which the certificate for Cupertino Shares surrendered in
    exchange therefor is registered, any transfer costs or expenses (except
    taxes) required by reason of the issuance of certificates for such Bancorp
    Shares in a name other than the registered holder of the certificate
    surrendered shall be paid by Bancorp.
 
        d.  All dividends or distributions, and any cash to be paid pursuant to
    Section 2.2 in lieu of fractional shares, if held by the Exchange Agent for
    payment or delivery to the holders of
 
                                       2

    unsurrendered certificates representing Cupertino Shares and unclaimed at
    the end of one year from the Effective Date, shall (together with any
    interest earned thereon) at such time be paid or redelivered by the Exchange
    Agent to Bancorp, and after such time any holder of a certificate
    representing Cupertino Shares who has not surrendered such certificate to
    the Exchange Agent shall, subject to applicable law, look as a general
    creditor only to Bancorp for payment or delivery of such dividends or
    distributions or cash, as the case may be.
 
    2.4  NO FURTHER TRANSFERS OF CUPERTINO SHARES.  At the Effective Time of the
Merger, the stock transfer books of Cupertino shall be closed and no transfer of
Cupertino Shares theretofore outstanding shall thereafter be made.
 
    2.5  ADJUSTMENTS.  If, between the date of this Agreement and the Effective
Date, the outstanding shares of Mid-Peninsula Shares or Cupertino Shares shall
have been changed into a different number of shares or a different class by
reason of any reclassification, recapitalization, split-up, combination,
exchange of shares or readjustment, or a stock dividend thereon shall be
declared with a record date within such period, the number of Bancorp Shares to
be issued and delivered in the Merger in exchange for each outstanding Cupertino
Share shall be correspondingly adjusted.
 
    2.6  TREATMENT OF STOCK OPTIONS.
 
        a.  Each person holding one or more options to purchase Cupertino Shares
    ("Cupertino Option" or "Cupertino Options") pursuant to Cupertino's (i) 1985
    Stock Option Plan, (ii) 1986 Non-Qualified Stock Option Plan, (iii) 1989
    Non-Qualified Stock Option Plan, or (iv) 1995 Stock Option Plan, each as
    amended to date ("Cupertino Stock Option Plans") shall have the right, in
    his or her discretion, to either:
 
           (i) Exercise any vested portion (including any portion vested as a
       result of the Merger) of the Cupertino option to acquire Cupertino Shares
       prior to the Effective Date; or
 
           (ii) As of the Effective Time of the Merger, surrender the Cupertino
       Option agreement to Mid-Peninsula, in which event such person will be
       entitled to receive a substitute option ("Substitute Option") exercisable
       for (a) the number of Bancorp Shares equal to the number of Cupertino
       Shares for which such person held Cupertino Options multiplied by the
       Conversion Ratio and rounded up to the nearest whole share, and (b) the
       exercise price for the shares subject to said options shall be adjusted
       by dividing the pre-Merger exercise price for such Cupertino Options by
       the Conversion Ratio, rounded to the nearest penny.
 
        b.  The Substitute Options to be received in exchange for Cupertino
    Options shall be, to the greatest extent practicable, vested to the same
    extent as before the Merger, shall continue to vest on the same vesting
    schedule as provided under the original applicable Cupertino Option
    agreement, shall be exercisable as provided in the original applicable
    Cupertino Option agreement and shall otherwise preserve the
    character-istics, terms and conditions of the original Cupertino Option to
    the greatest extent possible, subject to the requirements of law and the
    rules and regulations of the California Commissioner of Corporations.
 
3.  COVENANTS OF THE PARTIES.
 
    3.1  COVENANTS OF MID-PENINSULA.
 
        a.  AMENDMENT OF ARTICLES AND BYLAWS; VOTE REQUIREMENTS.  The Board of
    Directors of Mid-Peninsula shall take all necessary corporate action, to be
    effective at the Effective Time of the Merger, to amend the Articles of
    Incorporation and Bylaws of Mid-Peninsula to the extent required by
    applicable law or regulation and subject to any required approvals of
    shareholders, government agencies or regulatory authorities, to: (i) change
    Mid-Peninsula's name to Greater Bay Bancorp; (ii) provide for a range in the
    number of authorized directors of not less than seven (7) and not more than
    thirteen (13), and to adopt a resolution fixing the exact number of
    directors at ten (10); (iii) establish super-majority vote requirements
    mutually agreed upon by the parties equal to a two-thirds vote of the Board
    of Directors of Bancorp applicable to certain matters
 
                                       3

    affecting Bancorp, including (a) a merger, sale of control or sale of
    material assets of Bancorp, (b) acquisitions by Bancorp, (c) creation of new
    business units of Bancorp or its subsidiaries, MPB and CNB, (d) material
    changes in operating budgets of Bancorp or its subsidiaries, MPB and CNB,
    (e) material changes in the business organization or organizational
    structure of Bancorp or its subsidiaries, MPB and CNB, (f) termination of
    any executive or senior officer appointed to the Executive Management
    Committee of Bancorp, and (g) any change in the authorized range of
    directors.
 
        b.  AMENDMENT OF MID-PENINSULA STOCK OPTION PLAN.  Mid-Peninsula shall
    take all necessary corporate action, including any required approval of the
    shareholders of Mid-Peninsula, to amend its 1994 Stock Option Plan or
    establish a new stock option plan and cause to be filed and become effective
    under the Securities Act of 1933, as amended (the "1933 Act"), as of the
    Effective Time of the Merger, a registration statement with respect to the
    options to be granted and shares to be issued thereunder to fulfill the
    obligations to grant Substitute Options to holders of Cupertino Options
    pursuant to Section 2.6 of this Agreement.
 
        c.  NASDAQ STOCK MARKET LISTING.  Mid-Peninsula shall take all necessary
    action to list with the Nasdaq Stock Market for trading on the Nasdaq
    National Market System (i) Mid-Peninsula Shares, as soon as practicable
    following the execution of this Agreement and (ii) Bancorp Shares under a
    symbol mutually agreed upon by the parties, to be effective from and after
    the Effective Time of the Merger.
 
        d.  DEBENTURE AGREEMENT.  Mid-Peninsula shall take all appropriate
    action to cause the obligations of Cupertino to the holders of debentures
    issued pursuant to certain 11.5% Subordinated Debenture Agreements Due 2005
    and related Subscription Agreements and exhibits thereto, to be assumed by
    Bancorp in a supplemental debenture agreement in form and substance
    reasonably satisfactory to Mid-Peninsula and Cupertino and their respective
    counsel, as of the Effective Time of the Merger. The form of such
    supplemental debenture agreement shall be delivered by Mid-Peninsula to
    Cupertino on or before the Document Delivery Date (as defined in Section
    12b(xii)) of this Agreement.
 
    3.2  COVENANTS OF CUPERTINO.
 
        a.  TERMINATION OF CUPERTINO STOCK OPTION PLANS.  Cupertino shall take
    all necessary action to cause the termination of the Cupertino Stock Option
    Plans at the Effective Time of the Merger and the exercise or surrender (in
    exchange for Substitute Options) of Cupertino Options outstanding
    thereunder.
 
        b.  TERMINATION OR MERGER OF CUPERTINO BENEFIT PLANS.  If requested by
    Mid-Peninsula and subject to the mutual agreement of the parties, Cupertino
    shall take all necessary action to cause the termination or merger of
    Cupertino Benefit Plans at the Effective Time of the Merger.
 
    3.3  MUTUAL COVENANTS OF MID-PENINSULA AND CUPERTINO.
 
        a.  APPOINTMENT OF EXECUTIVE OFFICERS.  At the Effective Time of the
    Merger, the following persons shall become the executive officers of Bancorp
    and shall be appointed to the positions indicated: (i) David L. Kalkbrenner,
    President and Chief Executive Officer, (ii) Steven C. Smith, Executive Vice
    President, Chief Operating Officer and Chief Financial Officer, and (iii)
    David R. Hood, Executive Vice President and Chief Credit Officer.
 
        b.  APPOINTMENT OF DIRECTORS.  At the Effective Time of the Merger, the
    five (5) directors named below of Mid-Peninsula and Cupertino, respectively,
    shall become and constitute the Board of Directors of Bancorp, and Duncan L.
    Matteson and John M. Gatto shall be appointed as co-chairmen of the Board of
    Directors of Bancorp. The parties agree that such persons shall be nominated
    by management for election as directors of Bancorp at each annual or special
    meeting of shareholders of Bancorp at which directors are elected for a
    period of not less than two (2) years from the Effective Date. If any such
    person fails or declines to serve as a director, the vacancy
 
                                       4

    created thereby shall be filled during such two (2) year period by a nominee
    selected by a majority of the group consisting of former Mid-Peninsula or
    Cupertino directors, respectively, of which such person was a member prior
    to the Merger.
 
           (i) from Mid-Peninsula: David L. Kalkbrenner, Duncan L. Matteson,
       Donald H. Seiler, Warren R. Thoits and Edwin E. van Bronkhorst; and
 
           (ii) from Cupertino: John M. Gatto, James E. Jackson, Rex D. Lindsay,
       Glen McLaughlin and Dick J. Randall.
 
        c.  BOARD AND MANAGEMENT COMMITTEES.  The parties shall establish (i)
    such committees of the Board of Directors of Bancorp as may be mutually
    agreed upon, and (ii) an Executive Management Committee of Bancorp comprised
    of management personnel to facilitate and coordinate operations of Bancorp
    and such other matters as the parties may agree upon. Each party's nominees
    for appointment to committees of the Board of Directors of Bancorp shall be
    identified to the other party on or before the Determination Date. At the
    Effective Time of the Merger, the twelve (12) persons named below shall be
    appointed to the Executive Management Committee with the titles and
    positions held with Bancorp, MPB and CNB as indicated.
 
           (i) from Mid-Peninsula: David L. Kalkbrenner, President and Chief
       Executive Officer of Bancorp and MPB, Director of Bancorp, MPB and CNB,
       and Chairman of the Executive Management Committee; Murray B. Dey,
       Executive Vice President of MPB; Carol R. Rowland, First Vice President
       and Chief Financial Officer of MPB; Susan K. Black, Senior Vice
       President, Relationship Management Administration, of MPB; and Kimberly
       S. Burgess, Senior Vice President, Bank Support Services, of MPB.
 
           (ii) from Cupertino: C. Donald Allen, Chairman of the Board and Chief
       Executive Officer of CNB; Steven C. Smith, Executive Vice President and
       Chief Operating Officer of Bancorp and CNB, Chief Financial Officer of
       Bancorp, and Vice-Chairman of the Executive Management Committee; David
       R. Hood, Executive Vice President of Bancorp and CNB, Chief Credit
       Officer of Bancorp and Senior Lending Officer of CNB; Hall Palmer,
       Executive Vice President, Trust Group of Bancorp and CNB; Kenneth D.
       Brenner, Executive Vice President, Marketing and Business Development, of
       CNB; and Heidi R. Wulfe, Senior Vice President of Bancorp and CNB,
       Controller of Bancorp and Chief Financial Officer of CNB.
 
        d.  BOARD AND MANAGEMENT OF SUBSIDIARIES.  The parties intend that the
    Boards of Directors and management of Bancorp's subsidiary banks, MPB and
    CNB, shall remain substantially the same following the Effective Time of the
    Merger; provided, that David L. Kalkbrenner shall be appointed to the Board
    of Directors of CNB and John M. Gatto shall be appointed to the Board of
    Directors of MPB.
 
        e.  APPROVAL BY SHAREHOLDERS.  Each party shall cause the principal
    terms of the Merger to be submitted promptly for the approval of its
    shareholders at a meeting to be called and held in accordance with
    applicable laws. Subject to its continuing fiduciary duty to its
    shareholders, the Board of Directors of each party, in authorizing the
    execution and delivery of this Agreement, unanimously recommends that the
    principal terms of the Merger be approved. In connection with the call of
    such meeting, each party shall cause the Joint Proxy Statement/Prospectus to
    be mailed to its shareholders. Subject to its continuing fiduciary duty to
    the shareholders of Mid-Peninsula or Cupertino, as the case may be, the
    Board of Directors of each party shall at all times prior to and during such
    meeting of its shareholders recommend that the principal terms of the Merger
    be approved and, subject to such duty, use its best efforts to cause such
    approval (and the Board of Directors of Mid-Peninsula shall recommend that
    the amendments to its Articles of Incorporation, Bylaws and 1994 Stock
    Option Plan be approved).
 
        f.  SHAREHOLDER LISTS AND OTHER INFORMATION.  After execution hereof,
    each party shall from time to time make available to the other party, upon
    request, a list of its shareholders and their addresses, a list showing all
    transfers of its common stock and such other information as the other
 
                                       5

    party shall reasonably request regarding both the ownership and prior
    transfers of each party's common stock, provided that no such information
    shall be required for any period prior to the date of this Agreement.
 
        g.  GOVERNMENT APPROVALS.  Each party will use its best efforts in good
    faith to take or cause to be taken as promptly as practicable all such steps
    as shall be necessary to obtain (i) the prior approval of the Merger by the
    Board of Governors of the Federal Reserve System (the "FRB") under the Bank
    Holding Company Act of 1956, as amended, and (ii) all other such consents or
    approvals of government agencies and regulatory authorities as shall be
    required by law or otherwise desirable, and shall do any and all acts and
    things necessary or appropriate in order to cause the Merger to be
    consummated on the terms provided in the Merger Agreement and this Agreement
    as promptly as practicable. All approvals referred to in this Section 3.3(g)
    are hereinafter referred to as the "Government Approvals."
 
        h.  CAPITAL COMMITMENTS AND EXPENDITURES.  After the execution of this
    Agreement, no new capital commitments shall be entered into, and no capital
    expenditures shall be made by either party in excess of $50,000 in the
    aggregate, including but not limited to, creation of any new branches and
    acquisitions or leases of real property, except commitments or expenditures
    within existing operating and capital budgets heretofore furnished to and
    approved in writing by the other party.
 
        i.  NOTIFICATION OF BREACH OF REPRESENTATIONS, WARRANTIES AND
    COVENANTS.  Each party shall promptly give written notice to the other party
    upon becoming aware of the occurrence or impending or threatened occurrence
    of any event which would cause or constitute a breach of any of the
    representations, warranties or covenants of that party contained or referred
    to in the Merger Agreement or this Agreement and shall use its best efforts
    to prevent the same or to remedy the same promptly.
 
        j.  FINANCIAL STATEMENTS.
 
           (i) Each party has delivered or shall deliver to the other party
       prior to the Effective Date true and correct copies of statements of
       income, changes in shareholders' equity and statements of cash flows for
       the three months ended March 31, 1996 (and any subsequent quarter-end
       periods), and for the fiscal years ended December 31, 1995, 1994, 1993,
       1992 and 1991, and balance sheets as of the three month period ended
       March 31, 1996 (and any subsequent quarter-end periods), and as of
       December 31, 1995, 1994, 1993, 1992 and 1991. Such financial statements
       at December 31, 1995, 1994, 1993, 1992 and 1991 and for the fiscal years
       ended December 31, 1995, 1994, 1993, 1992 and 1991 have been or shall be
       audited by KPMG Peat Marwick LLP or its predecessor, Coopers & Lybrand
       LLP, as independent public accountants for Mid-Peninsula during the
       relevant periods, and Coopers & Lybrand LLP or its predecessor, Deloitte
       & Touche LLP, as independent public accountants for Cupertino during the
       relevant periods, and include or shall include an opinion of such
       accounting firm to the effect that such financial statements have been
       prepared in accordance with generally accepted accounting principles
       consistently applied throughout the periods covered by such financial
       statements and present fairly, in all material respects, the consolidated
       financial position, results of operations and cash flows of each party at
       the dates indicated and for the periods then ending. The opinions of such
       accounting firm do not and shall not contain any qualifications.
 
           (ii) Each party shall provide to the other party, at or prior to the
       Effective Date, copies of all financial statements and proxy statements
       issued or to be issued to its shareholders and/ or directors between the
       date of this Agreement and the Effective Date.
 
          (iii) Each party has delivered or shall deliver, to the other party
       true and complete copies of its Annual Reports to Shareholders for the
       years ended December 31, 1995, 1994, 1993, 1992 and 1991, all periodic
       reports required to be filed by it pursuant to Section 13(a) or
 
                                       6

       15(d) of the Securities Exchange Act of 1934, as amended (the "1934 Act")
       since December 31, 1990, all proxy statements and other written material
       furnished to its shareholders since December 31, 1990, and all other
       material reports, including call reports, relating to Mid-Peninsula, MPB,
       Cupertino and CNB filed by Mid-Peninsula, MPB, Cupertino, or CNB with the
       Federal Deposit Insurance Corporation ("FDIC"), FRB, Office of the
       Comptroller of the Currency ("OCC"), or California Superintendent of
       Banks ("Superintendent") during 1991 through the Effective Date. As of
       their respective filing dates, each of the documents described in the
       preceding sentence complied or shall comply in all material respects with
       all legal and regulatory requirements applicable thereto.
 
        k.  COMPENSATION.  Except as may be consistent with past practices
    disclosed to each party by the other party, neither party shall make or
    approve any increase in the compensation payable or to become payable by it
    to any of its directors, officers, employees or agents (including but not
    limited to compensation through any profit sharing, pension, retirement,
    severance, incentive or other employee benefit program or arrangement), nor
    shall any bonus payment or any agreement or commitment to make a bonus
    payment be made, nor shall any stock option, warrant or other right to
    acquire capital stock be granted (except as provided in Section 2.6), or
    employment agreement (other than any such employment agreement that may
    arise by operation of law upon the hiring of any new employee) or consulting
    agreement be entered into by either party with any such directors, officers,
    employees or agents unless the other party has given its prior written
    consent. Nothing herein shall prevent the payment to either party's officers
    and employees of regular salary increases, consistent with past practices in
    connection with regular salary reviews or bonuses consistent with past
    practices, as heretofore disclosed to the other party. Without the prior
    written consent of the other party, neither party shall hire any new
    employee at an annual rate in excess of that party's current customary
    practice.
 
        l.  CONDUCT OF BUSINESS IN THE ORDINARY COURSE.  Prior to the Effective
    Time of the Merger:
 
           (i) Both parties shall conduct their businesses (including the
       businesses of their subsidiaries) in the ordinary course as heretofore
       conducted. For purposes of this Agreement, the "Ordinary Course of
       Business" of either party shall consist of the banking and related
       businesses as presently conducted by it and its subsidiaries in
       compliance with customary safe and sound banking practices and applicable
       laws and regulations. Unless either party has given its previous written
       consent (which shall be deemed to have been given if no response is
       provided following written request therefor within three (3) business
       days of receipt of such request) to any act or omission to the contrary,
       each party shall, and shall cause its subsidiaries to, until the
       Effective Date:
 
               (a) preserve its business and business organizations intact;
 
               (b) preserve the good will of customers and others having
           business relations with it and take no action that would impair the
           benefit to the other party of the goodwill of it or the other
           benefits of the Merger;
 
               (c) consult with the other party as to the making of any
           decisions or the taking of any actions in matters other than in the
           Ordinary Course of Business;
 
               (d) maintain its properties in customary repair, working order
           and condition (reasonable wear and tear excepted);
 
               (e) comply with all laws, regulations and decrees applicable to
           the conduct of its business;
 
               (f) use its best efforts to keep in force at not less than its
           present limits all policies of insurance (including deposit insurance
           of the FDIC) to the extent reasonably practicable in light of the
           prevailing market conditions in the insurance industry;
 
                                       7

               (g) use its best efforts to keep available to the other party the
           services of its present officers and employees (it being understood
           that each party shall have the right to terminate the employment of
           any of its officers or employees in accordance with its established
           employment procedures);
 
               (h) comply with all orders of and agreements or memoranda of
           understanding with respect to it made by or with, the FDIC, FRB, OCC,
           Superintendent, or any other government agency or regulatory
           authority of competent jurisdiction, and promptly forward to the
           other party all communications received from any such agency or
           authority that are not prohibited by such agency or authority from
           being so disclosed and inform the other party of any material
           restrictions imposed by any government agency or regulatory authority
           on its business;
 
               (i) file in a timely manner (taking into account any extensions
           duly obtained) all reports, tax returns and other documents required
           to be filed with federal, state, local and other authorities;
 
               (j)  conduct an environmental audit prior to foreclosure on any
           property concerning which it has knowledge, or should have knowledge,
           that asbestos or asbestos-containing material, PCB's or
           PCB-contaminated materials, any petroleum product, or hazardous
           substance or waste (as defined under any applicable environmental
           laws) was or is present, manufactured, recycled, reclaimed, released,
           stored, treated, or disposed of, and provide the results of such
           audit to and consult with the other party regarding the significance
           of the audit prior to the foreclosure on any such property;
 
               (k) not sell, lease, pledge, assign, encumber or otherwise
           dispose of any of its assets except in the Ordinary Course of
           Business, for adequate value, without recourse and consistent with
           its customary practice;
 
               (l) not take any action to create, relocate or terminate the
           operations of any banking office or branch, or to form any new
           subsidiary or affiliated entity; and
 
               (m) not settle or otherwise take any action to release or reduce
           any of its rights with respect to any litigation involving a claim of
           more than $25,000 in which it is a party.
 
           (ii) Neither party shall, without first having obtained the written
       consent of the other party (which shall be deemed to have been given if
       no response is provided following written request therefor within three
       (3) business days of receipt of such request), cause its officers to
       commit to any loan which does not comply in all material respects with
       its credit policies in effect and as disclosed and provided to the other
       party prior to the date of this Agreement (except venture loans
       originated by CNB which shall be subject to the venture loan approval
       procedures in effect at CNB and as disclosed to Mid-Peninsula prior to
       the date of this Agreement).
 
          (iii) Each party shall promptly notify the other party in writing upon
       the occurrence by it of any of the following:
 
               (a) the classification of any loan as substandard, doubtful or
           loss; or
 
               (b) the filing or commencement of any legal action or other
           proceeding or investigation against it.
 
        m.  PRESS RELEASES.  Neither party shall issue any press release or
    written statement for general circulation relating to the Merger, this
    Agreement or the Merger Agreement unless previously provided to the other
    party for review and approval (which approval will not be unreasonably
    withheld or delayed) and each party shall cooperate with the other party in
    the development and distribution of all news releases and other public
    information disclosures with respect to the Merger, this Agreement or the
    Merger Agreement; provided that either party may,
 
                                       8

    without the consent of the other party, make any disclosure with regard to
    the Merger, this Agreement or the Merger Agreement that it determines with
    advice of counsel is required under any applicable law or regulation.
 
        n.  NO MERGER OR SOLICITATION.
 
           (i) Subject to the continuing fiduciary duty of the Board of
       Directors of each party to its shareholders, prior to the Effective Time
       of the Merger, neither party shall effect or agree to effect or enter
       into a transaction or series of transactions with one or more third
       persons, groups or entities providing for the acquisition of all or a
       substantial part of either party or their respective subsidiaries,
       whether by way of merger, exchange of stock, sale of assets, or otherwise
       ("Business Combination"), acquire or agree to acquire any of its own
       capital stock or the capital stock or asset (except in a fiduciary
       capacity or in the Ordinary Course of Business) of any other entity, or
       commence any proceedings for winding up and dissolution affecting either
       of them.
 
           (ii) Subject to the continuing fiduciary duty of the Board of
       Directors of each party to its shareholders, prior to the Effective Time
       of the Merger, neither party nor any officer, director or affiliate of
       either party, nor any investment banker, attorney, accountant or other
       agent, advisor or representative retained by either party shall (a)
       solicit or encourage, directly or indirectly, any inquiries, discussions
       or proposals for, continue, propose or enter into discussions or
       negotiations looking toward, or enter into any agreement or understanding
       providing for, any Business Combination with any third party; or (b)
       disclose, directly or indirectly, any nonpublic information to any
       corporation, partnership, person or other entity or group concerning such
       party's business and properties or afford any such other party access to
       its properties, books or records or otherwise assist or encourage any
       such other party in connection with the foregoing, or (c) furnish or
       cause to be furnished any information concerning its business, financial
       condition, operations, properties or prospects to another person, having
       any actual or prospective role with respect to any such Business
       Combination.
 
          (iii) Each party shall notify the other party immediately of the
       details of any indication of interest of any person, corporation, firm,
       association or group to acquire by any means a controlling interest in it
       or engage in any Business Combination with it.
 
          (iv) Notwithstanding anything to the contrary contained in this
       Agreement, in the event the Board of Directors of either party receives a
       bona fide unsolicited offer for a Business Combination of it with another
       entity, and reasonably determines, upon advice of counsel, that as a
       result of such offer, any duty to act or to refrain from doing any act
       pursuant to this Agreement is inconsistent with the continuing fiduciary
       duties of the Board of Directors to its shareholders, subject to the
       provisions of this Agreement including, without limitation, Section
       12e(ii) and the rights accorded a party thereunder which shall remain in
       effect, such duty to act or to refrain from doing any act shall be
       excused and such failure to act or refrain from doing any act shall not
       (a) constitute the failure of any condition, breach of any covenant or
       otherwise constitute any breach of this Agreement, or (b) create any
       claim or cause of action asserting any liability against any member of
       the Board of Directors of that party.
 
        o.  EMPLOYEE BENEFIT PLANS.  Both parties agree that other than the
    Mid-Peninsula 1994 Stock Option Plan (as amended in accordance with Section
    3.1(b) of this Agreement) and 401(k) Plan which shall survive as employee
    benefit plans of Bancorp, either party's employee benefit plans may be
    terminated, frozen, modified or merged into the other party's plans on or
    after the Effective Date in accordance with applicable laws and regulations
    and the provisions of the IRC, as determined by mutual agreement of the
    parties or by Bancorp. On the Effective Date, Mid-Peninsula and Cupertino
    employees that become employees of Bancorp will commence participation in
    Bancorp's employee benefit plans in accordance with the terms and conditions
    provided under such plans; provided, however, that each employee of
    Mid-Peninsula and each employee of
 
                                       9

    Cupertino who becomes an employee of Bancorp ("Transferred Employee") shall
    receive credit for his or her years of service with Mid-Peninsula or
    Cupertino, as applicable, for purposes of eligibility and vesting under
    Bancorp's employee benefit plans; provided, further, that each Transferred
    Employee who elects coverage under Bancorp's indemnity health plan within
    thirty (30) days after coverage is extended to him or her shall not be
    subject to any pre-existing condition limitation under such indemnity health
    plan.
 
        p.  CHANGES IN CAPITAL STOCK; DIVIDENDS.  On or after the date hereof
    and at or prior to the Effective Time of the Merger, except with the prior
    written consent of the other party or as otherwise provided in this
    Agreement and the Merger Agreement:
 
           (i) Neither party shall amend its Articles of Incorporation or the
       Articles of Incorporation or Association of its subsidiary, as the case
       may be, or Bylaws of either party or its subsidiary; make any change in
       their respective authorized, issued or outstanding capital stock or any
       other equity security; issue, grant, sell, pledge, assign or otherwise
       encumber or dispose of, or purchase, redeem, retire or otherwise acquire
       (other than in a fiduciary capacity), shares of or securities convertible
       into, capital stock or other equity securities of their respective
       companies, or enter into any agreement, call or commitment of any
       character so to do; grant or issue any stock option relating to or right
       to acquire shares of their capital stock or other equity security; or
       agree to do any of the foregoing, except as expressly provided herein.
       Nothing herein shall prohibit the issuance of shares upon exercise of
       options granted under the Mid-Peninsula Stock Option Plan or Cupertino
       Stock Option Plans and outstanding at the time this Agreement is
       executed; and
 
           (ii) Neither party shall declare, set aside or pay any dividend or
       other distribution in respect of its common stock (including, without
       limitation, any stock dividend or distribution) other than regular
       quarterly or semi-annual cash dividends on its common stock in amounts
       substantially equivalent to cash dividends paid in the two years prior to
       the date hereof (it being understood that declaration of a quarterly or
       semi-annual cash dividend equal to the most recent previous quarterly or
       semi-annual cash dividend will be deemed to meet this standard).
 
        q.  ACCESS TO PROPERTIES, BOOKS AND RECORDS; CONFIDENTIALITY.  Prior to
    the Effective Time of the Merger, each party shall give the other party and
    its counsel, accountants and agents, full access during normal business
    hours and upon reasonable request, to all of its properties, books,
    contracts, commitments and records including, but not limited to, the
    corporate, financial and operational records, papers, reports, instructions,
    procedures, tax returns and filings tax settlement letters, material
    contracts or commitments, regulatory examinations and correspondences, and
    shall allow the other party to make copies of such materials and shall
    furnish the other party with all such information concerning its affairs as
    the other party may reasonably request. Each party shall also use its best
    efforts to cause its independent accountants to make available to the other
    party, its accountants, counsel and other agents, to the extent reasonably
    requested in connection with such review, such independent accountants' work
    papers and documentation relating to its work papers and its audits of the
    books and records of each party. The availability or actual delivery of such
    information about either party shall not affect the covenants,
    representations and warranties of either party contained in this Agreement
    and in the Merger Agreement. Each party shall use its best efforts to cause
    its officers, directors, employees, auditors, and attorneys to cooperate
    with the other in its reasonable requests for information. Each party shall
    treat as confidential all such information in the same manner as each party
    treats similar confidential information of its own, and if this Agreement is
    terminated, each party shall continue to treat all such information as
    confidential and to cause its employees to keep all such information
    confidential and shall return such documents theretofore delivered by the
    other party as the other party shall request, and shall use such
    information, or cause it to be used, solely for the purposes of evaluating
    and completing the transactions contemplated hereby; provided that each
    party may disclose any such information to the extent required by federal or
    state securities laws
 
                                       10

    or otherwise required by any government agency or regulatory authority, or
    by generally accepted accounting principles. The foregoing confidentiality
    obligations shall not apply in respect of any information publicly available
    or to any information previously known to the party in question, the use of
    which is not otherwise restricted. Notwithstanding the foregoing, the
    parties agree to comply with the terms and provisions of that certain
    Confidentiality Agreement entered into between the parties dated May 8,
    1996, and any inconsistency between the terms and provisions of that
    Confidentiality Agreement and the foregoing provisions shall be resolved in
    favor of the terms and provisions contained in the Confidentiality
    Agreement.
 
        r.  LOAN PERFORMANCE.  From and after the date of this Agreement until
    the Effective Date, each party will provide to the other the following
    reports for each such month concurrent with the distribution of the monthly
    board report materials for the respective Boards of Directors of MPB and
    CNB:
 
           (i) a status report on all loans classified as substandard, doubtful
       or loss;
 
           (ii) past due reports by loan;
 
          (iii) non-accrual reports by loan;
 
          (iv) loss reports by loan;
 
           (v) restructured loans reports; and
 
          (vi) quarterly call reports submitted to regulators during such month,
       if any.
 
        s.  LOAN REVIEW.  Prior to the Effective Date, each party will submit to
    the other party (for such party's information only) a loan approval/credit
    write-up document for any loan that is all of the following: (i) a new loan,
    or a restructured (SFAS 15) loan, or a renewal of an existing loan
    previously classified by management or internal policy or procedure of
    either party or their subsidiaries, or by any outside review examiner,
    accountant or any bank regulatory authority as "Other Loans Specially
    Mentioned," "Special Mention," "Substandard," "Doubtful," or "Loss," or
    classified using categories or words with similar import, and (ii) in a
    commitment amount over $1,000,000 or when the aggregate debt of the borrower
    and its affiliates and/or related interests will exceed $1,000,000.
 
        t.  PREPARATION OF JOINT PROXY STATEMENT/PROSPECTUS.  Cupertino shall
    cooperate with Mid-Peninsula in the preparation pursuant to Section 6 hereof
    of a joint proxy statement and prospectus of Mid-Peninsula to be sent to the
    shareholders of Mid-Peninsula and Cupertino (the proxy materials and
    prospectus, together with any amendments or supplements thereto, being
    herein referred to as the "Joint Proxy Statement/Prospectus").
 
4.  REPRESENTATIONS AND WARRANTIES OF CUPERTINO.
 
    In the following representations and warranties, all references to assets,
liabilities, properties, rights, obligations, financial condition, operations,
knowledge, information and other characteristics of Cupertino shall be deemed to
include reference to those characteristics of CNB on a consolidated basis,
except as the context otherwise indicates or requires. Cupertino represents and
warrants to Mid-Peninsula that, except as set forth on a Schedule delivered to
Mid-Peninsula on or before the Document Delivery Date, in form and substance
satisfactory to Mid-Peninsula and corresponding in number with the applicable
section:
 
        a.  CORPORATE STATUS AND POWER TO ENTER INTO AGREEMENTS.  (i) Cupertino
    is a corporation duly incorporated, validly existing and in good standing
    under California law and is a registered bank holding company under the Bank
    Holding Company Act of 1956, as amended, (ii) subject to obtaining the
    Government Approvals and approval of the principal terms of the Merger by
    the Cupertino shareholders, Cupertino has all necessary corporate power to
    enter into this Agreement and the Merger Agreement and to carry out all of
    the terms and provisions hereof and thereof to be carried out by it, (iii)
    CNB holds a currently valid license issued by the OCC to
 
                                       11

    engage in the commercial banking business in California at the locations at
    which it is licensed and currently conducts business, and (iv) neither
    Cupertino nor CNB is subject to any directive, resolution, memorandum of
    understanding or order of the FDIC, FRB, OCC or any other regulatory
    authority having jurisdiction over its business or any of its assets or
    properties. Neither the scope of the business of Cupertino or CNB nor the
    location of their properties requires either of them to be licensed to do
    business in any jurisdiction other than the State of California. CNB's
    deposits are insured by the FDIC to the maximum extent permitted by
    applicable law and regulation.
 
        b.  ARTICLES, BYLAWS, BOOKS AND RECORDS.  The copies of the Articles of
    Incorporation and Articles of Association and Bylaws of Cupertino and CNB,
    respectively, heretofore delivered to Mid-Peninsula are complete and
    accurate copies thereof as in effect on the date hereof. The minute books of
    Cupertino and CNB made available to Mid-Peninsula contain a complete and
    accurate record of all meetings of Cupertino's and CNB's respective Boards
    of Directors (and committees thereof) and shareholders. The corporate books
    and records (including financial statements) of Cupertino and CNB fairly
    reflect the material transactions to which Cupertino and CNB are parties or
    by which their properties are subject or bound, and such books and records
    have been properly kept and maintained.
 
        c.  COMPLIANCE WITH LAWS, REGULATIONS AND DECREES.  Cupertino and CNB
    (i) have the corporate power to own or lease their properties and to conduct
    their business as currently conducted, (ii) have complied in all material
    respects with, and are not in material default of any laws, regulations,
    ordinances, orders or decrees applicable to the conduct of their business
    and the ownership of their properties, including but not limited to all
    federal and state laws (including but not limited to the Bank Secrecy Act),
    rules and regulations relating to the offer, sale or issuance of securities,
    and the operation of a commercial bank, other than where such noncompliance
    or default is not likely to result in a material limitation on the conduct
    of the business of Cupertino or CNB or is not likely to otherwise have a
    material adverse effect on Cupertino and CNB taken as a whole, (iii) have
    not failed to file with the proper federal, state, local or other
    authorities any material report or other document required to be filed, and
    (iv) have all approvals, authorizations, consents, licenses, clearances and
    orders of, and have currently effective all registrations with, all
    government and regulatory authorities which are necessary to the business
    and operations of Cupertino and CNB as now being conducted.
 
        d.  CAPITALIZATION.  The authorized capital stock of Cupertino consists
    of 6,000,000 shares of Cupertino common stock, no par value, of which
    1,882,547 shares are duly authorized, validly issued, fully paid and
    nonassessable and currently outstanding, and 4,000,000 shares of Cupertino
    preferred stock of which no shares are outstanding. Said stock has been
    offered, sold and issued in compliance with all applicable securities laws.
    There are currently outstanding options to purchase 341,382 shares of
    Cupertino common stock, at a weighted average exercise price of $7.87 per
    share, issued pursuant to the Cupertino Stock Option Plans. Said options
    were issued and, upon issuance in accordance with the terms of the
    outstanding options said shares shall be issued, in compliance with all
    applicable securities laws. Otherwise, there are no outstanding (i) options,
    agreements, calls or commitments of any character which would obligate
    Cupertino to issue, sell, pledge, assign or otherwise encumber or dispose
    of, or to purchase, redeem or otherwise acquire, any Cupertino common stock
    or any other equity security of Cupertino, or (ii) warrants or options
    relating to, rights to acquire, or debt or equity securities convertible
    into, shares of Cupertino common stock or any other equity security of
    Cupertino. The outstanding common stock of Cupertino is registered with the
    Securities and Exchange Commission (the "Commission") pursuant to Section
    12(g) of the 1934 Act. Cupertino owns all of the outstanding equity
    securities of CNB. Except as collateral for outstanding loans held in their
    loan portfolios, neither Cupertino nor CNB owns, directly or indirectly, any
    equity interest in any bank (other than Cupertino's ownership of CNB),
    corporation or other entity.
 
                                       12

        e.  TRADEMARKS AND TRADE NAMES.  To the best of the knowledge of
    Cupertino, Cupertino and CNB (i) own and have the exclusive right to use all
    trademarks, trade names, patents, copyrights, service marks, trade secrets,
    or other intellectual property rights (collectively, "Intellectual Property
    Rights") used in or necessary for the conduct of their businesses as now or
    heretofore conducted; and (ii) are not infringing upon the Intellectual
    Property Rights of any other person or entity. No claim is pending or
    threatened by any person or entity against or otherwise affecting the use by
    Cupertino or CNB of any Intellectual Property Rights and, to the best of its
    knowledge, there is no valid basis for any such claim.
 
        f.  FINANCIAL STATEMENTS, REGULATORY REPORTS.  No financial statement or
    other document provided or to be provided to Mid-Peninsula as required by
    Section 3.3(j) hereof, as of the date of such document, contained, or as to
    documents to be delivered after the date hereof, will contain, any untrue
    statement of a material fact, or, at the date thereof, omitted or will omit
    to state a material fact necessary in order to make the statements contained
    therein, in light of the circumstances under which such statements were or
    will be made, not misleading; provided, however, that information as of a
    later date shall be deemed to modify contrary information as of any earlier
    date. Cupertino and CNB have filed all material documents and reports
    required to be filed by them with the FDIC, FRB, OCC, the Commission and any
    other government agency or regulatory authority having jurisdiction over
    their business, assets or properties. All such reports conform in all
    material respects with the requirements promulgated by such government
    agencies and regulatory authorities. All compliance or corrective action
    relating to Cupertino and CNB required by government agencies and regulatory
    authorities having jurisdiction over Cupertino or CNB has been taken. Except
    as disclosed in such statements, reports or documents, neither Cupertino nor
    CNB has received any notification, formally or informally, from any agency
    or department of any federal, state or local government or any regulatory
    authority or the staff thereof (i) asserting that it is not in compliance
    with any of the statutes, regulations or ordinances which such government or
    regulatory authority enforces, or (ii) threatening to revoke any license,
    franchise, permit or government authorization. Cupertino and CNB have paid
    all assessments made or imposed by any government agency. Cupertino has
    delivered to Mid-Peninsula copies of all annual management letters and
    opinions, and has made available to Mid-Peninsula for inspection all
    reviews, correspondence and other documents in the files of Cupertino
    prepared by Coopers & Lybrand LLP or any other certified public accountant
    engaged by Cupertino and
    delivered to Cupertino since December 31, 1990. The financial records of
    Cupertino have been, and are being and shall be, maintained in all material
    respects in accordance with all applicable legal and accounting requirements
    sufficient to insure that all transactions reflected therein are, in all
    material respects, executed in accordance with management's general or
    specific authorization and recorded in conformity with generally accepted
    accounting principles at the time in effect. The data processing equipment,
    data transmission equipment, related peripheral equipment and software used
    by Cupertino in the operation of its business to generate and retrieve its
    financial records are adequate for the current needs of Cupertino.
 
        g.  TAX RETURNS.
 
           (i) Cupertino and/or CNB has timely filed all federal, state, county,
       local and foreign tax returns required to be filed by it, including,
       without limitation, estimated tax, use tax, excise tax, real property and
       personal property tax reports and returns, employer's withholding tax
       returns, other withholding tax returns and Federal Unemployment Tax
       Returns, and all other reports or other information required or requested
       to be filed by either of them, and each such return, report or other
       information was, when filed, complete and accurate in all material
       respects. Cupertino and/or CNB has paid all taxes, fees and other
       government charges, including any interest and penalties thereon, when
       they have become due, except those that are being contested in good
       faith, which contested matters have been disclosed to Mid-Peninsula.
       Cupertino and/or CNB has not been requested to give nor has it given any
       currently effective waivers extending the statutory period of limitation
       applicable to any tax
 
                                       13

       return required to be filed by it for any period. There are no claims
       pending against Cupertino and/or CNB for any alleged deficiency in the
       payment of any taxes, and Cupertino does not know of any pending or
       threatened audits, investigations or claims for unpaid taxes or relating
       to any liability in respect of any taxes. There have been no events,
       including a change in ownership, that would result in a reappraisal and
       establishment of a new base-year full value for purposes of applicable
       provisions of the California Constitution, of any real property owned in
       whole or in part by Cupertino or CNB or to the best of Cupertino's
       knowledge, of any real property leased by Cupertino or CNB.
 
           (ii) Cupertino has heretofore delivered to Mid-Peninsula copies of
       all its tax returns with respect to taxes payable to the United States of
       America and the State of California for the fiscal years ended December
       31, 1995, 1994, 1993, 1992 and 1991.
 
          (iii) No consent has been filed relating to Cupertino pursuant to
       Section 341(f) of the IRC.
 
        h.  MATERIAL ADVERSE CHANGE.  Except as heretofore disclosed in writing
    by Cupertino to Mid-Peninsula, since December 31, 1995, there has been (i)
    no material adverse change in the business, assets, licenses, permits,
    franchises, results of operations or financial condition of Cupertino or CNB
    (whether or not in the Ordinary Course of Business), (ii) no change in any
    of the assets, licenses, permits or franchises of Cupertino or CNB that has
    had or can reasonably be expected to have a material adverse effect on any
    of the items listed in clause (h)(i) above, (iii) no damage, destruction, or
    other casualty loss (whether or not covered by insurance) that has had or
    can reasonably be expected to have a material adverse effect on any of the
    items listed in clause (h)(i) above, (iv) no amendment, modification, or
    termination of any existing, or entering into of any new, contract,
    agreement, plan, lease, license, permit or franchise that is material to the
    business, financial condition, assets, liabilities or operations of
    Cupertino and CNB, except in the Ordinary Course of Business; and (v) no
    disposition by Cupertino or CNB of one or more assets that, individually or
    in the aggregate, are material to Cupertino or CNB, except sales of assets
    in the Ordinary Course of Business.
 
        i.  NO UNDISCLOSED LIABILITIES.  Except for items for which reserves
    have been established in the unaudited balance sheets of Cupertino as of
    March 31, 1996, Cupertino has not incurred or discharged, and is not legally
    obligated with respect to, any indebtedness, liability (including, without
    limitation, a liability arising out of an indemnification, guarantee, hold
    harmless or similar arrangement) or obligation (accrued or contingent,
    whether due or to become due, and whether or not subordinated to the claims
    of its general creditors), other than as a result of operations in the
    Ordinary Course of Business after such date. No agreement pursuant to which
    any loans or other assets have been or will be sold by Cupertino or CNB
    entitles the buyer of such loans or other assets, unless there is a material
    breach of a representation or covenant by Cupertino or CNB, to cause
    Cupertino or CNB to repurchase such loan or other asset or to pursue any
    other form of recourse against Cupertino or CNB. Neither Cupertino nor CNB
    has knowingly made or shall make any representation or covenant in any such
    agreement that contained or shall contain any untrue statement of a material
    fact or omitted or shall omit to state a material fact necessary in order to
    make the statements contained therein, in light of the circumstances under
    which such representations and/or covenants were made or shall be made, not
    misleading. No cash, stock or other dividend or any other distribution with
    respect to the Cupertino Shares has been declared, set aside or paid, nor
    have any of the Cupertino Shares been purchased, redeemed or otherwise
    acquired, directly or indirectly, by Cupertino since December 31, 1995.
 
                                       14

        j.  PROPERTIES AND LEASES.
 
           (i) Cupertino and CNB have good and marketable title, free and clear
       of all liens and encumbrances and the right of possession, subject to
       existing leaseholds, to all real properties and good title, free and
       clear of all liens and encumbrances, to all other property and assets,
       tangible and intangible, reflected in the Cupertino balance sheet as of
       March 31, 1996 (except property held as lessee under leases disclosed in
       writing prior to the date hereof and except personal property sold or
       otherwise disposed of since March 31, 1996, in the Ordinary Course of
       Business), except for (a) liens for taxes or assessments not delinquent,
       (b) such other liens and encumbrances and imperfections of title as do
       not materially affect the value of such property as reflected in the
       Cupertino balance sheet as of March 31, 1996, or as currently shown on
       the books and records of Cupertino and which do not interfere with or
       impair its present and continued use, or (c) exceptions disclosed in
       title reports and preliminary title reports, copies of which have been
       provided to Mid-Peninsula. All tangible properties of Cupertino and CNB
       conform in all material respects with all applicable ordinances,
       regulations and zoning laws. All tangible properties of Cupertino and CNB
       are in a good state of maintenance and repair and are adequate for the
       current business of Cupertino and CNB. No properties of Cupertino and
       CNB, and, to the best of Cupertino's knowledge, no properties in which
       Cupertino or CNB holds a collateral or contingent interest or purchase
       option, are the subject of any pending or threatened investigation, claim
       or proceeding relating to the use, storage or disposal on such property
       of or contamination of such property by any toxic or hazardous waste
       material or substance. To the best of Cupertino's knowledge, neither
       Cupertino nor CNB owns, possesses or has a collateral or contingent
       interest or purchase option in any properties or other assets which
       contain or have located within or thereon any hazardous or toxic waste
       material or substance unless the location of such hazardous or toxic
       waste material or other substance or its use thereon conforms in all
       material respects with all federal, state and local laws, rules,
       regulations or other provisions regulating the discharge of materials
       into the environment. As to any real property not owned or leased by
       Cupertino or CNB and held as security for a loan or in which Cupertino or
       CNB otherwise has an interest, neither Cupertino or CNB has controlled,
       directed or participated in the operation or management of any such real
       property or any facilities or enterprise conducted thereon, such that it
       has become an owner or operator of such real property under applicable
       environmental laws.
 
           (ii) All properties held by Cupertino or CNB under leases are held
       under valid, binding and enforceable leases, with such exceptions as are
       not material and do not interfere with the conduct of the business of
       Cupertino or CNB, and Cupertino and CNB enjoy quiet and peaceful
       possession of such leased property. Neither Cupertino nor CNB is in
       material default in any respect under any material lease, agreement or
       obligation regarding its properties to which it is a party or by which it
       is bound.
 
          (iii) Except as disclosed to Mid-Peninsula in writing, all of
       Cupertino's and CNB's rights and obligations under the leases referred to
       in Section 4(j)(ii) above do not require the consent of any other party
       to the transaction contemplated by this Agreement and the Merger
       Agreement. Where required, Cupertino and CNB shall obtain, prior to the
       Effective Date, the consent of such parties to such transaction.
 
        k.  MATERIAL CONTRACTS.  Except as previously disclosed to Mid-Peninsula
    in writing and excluding loans, lines of credit, loan commitments or letters
    of credit to which Cupertino or CNB is a party, neither Cupertino nor CNB is
    a party to or bound by any contract or other agreement made in the Ordinary
    Course of Business which involves aggregate future payments by or to
    Cupertino or CNB of more than $20,000 and which is made for a fixed period
    expiring more than one year from the date hereof, and neither Cupertino nor
    CNB is a party to or bound by any agreement not made in the Ordinary Course
    of Business which is to be performed at or after the date hereof. Each of
    the contracts and agreements disclosed to Mid-Peninsula pursuant to this
 
                                       15

    Section 4(k) is a legal and binding obligation (subject to applicable
    bankruptcy, insolvency and similar laws affecting creditors' rights
    generally and subject, as to enforceability, to equitable principles of
    general applicability), and no breach or default (and no condition which,
    with notice or passage of time, or both, could become a breach or default)
    exists with respect thereto.
 
        l.  CLASSIFIED LOANS.  Except as previously disclosed to Mid-Peninsula
    in writing, there are no loans presently owned by Cupertino or CNB that have
    been classified by Cupertino or CNB management or Cupertino or CNB internal
    policy or procedure, any outside review examiner, accountant or any bank
    regulatory authority as "Other Loans Specially Mentioned," "Special
    Mention," "Substandard," "Doubtful," or "Loss" or classified using
    categories or words with similar import and all loans or portions thereof so
    classified shall have been charged off to the extent required. Cupertino and
    CNB regularly review and appropriately classify their loans in accordance
    with all applicable legal and regulatory requirements and generally accepted
    banking practices. All loans and investments of Cupertino and CNB are legal,
    valid and binding obligations enforceable in accordance with their
    respective terms and are not subject to any setoffs, counterclaims or
    disputes (subject to applicable bankruptcy, insolvency and similar laws
    affecting creditors' rights generally and subject, as to enforceability, to
    equitable principles of general applicability), except as disclosed to
    Mid-Peninsula in writing or reserved for in the unaudited balance sheet of
    Cupertino as of March 31, 1996, and were duly authorized under and made in
    compliance with applicable federal and state laws and regulations. Neither
    Cupertino nor CNB has any extensions of credit, investments, guarantees,
    indemnification agreements or commitments for the same (including without
    limitation commitments to issue letters of credit, to create acceptances, or
    to repurchase securities, federal funds or other assets) other than those
    documented on the books and records of Cupertino and CNB.
 
        m.  RESTRICTIONS ON INVESTMENTS.  Except for pledges to secure public
    and trust deposits and repurchase agreements in the Ordinary Course of
    Business, none of the investments reflected in the Cupertino balance sheet
    as of March 31, 1996, and none of the investments made by Cupertino or CNB
    since March 31, 1996, is subject to any restriction, whether contractual or
    statutory, which materially impairs the ability of Cupertino or CNB to
    freely dispose of such investment at any time.
 
        n.  EMPLOYMENT BENEFIT PLANS/ERISA.
 
           (i) Cupertino has provided to Mid-Peninsula an accurate list setting
       forth all bonus, incentive compensation, profit-sharing, pension,
       retirement, stock purchase, stock option, deferred compensation,
       severance, hospitalization, medical, dental, vision, group insurance,
       death benefit, disability and other fringe benefit plans, trust
       agreements, arrangements and commitments of Cupertino and CNB (including
       but not limited to any such plans, agreements, arrangements and
       commitments applicable to former employees or retired employees, or for
       which such persons are eligible) (collectively, "Employee Plans"), if
       any, together with copies of all such Employee Plans that are documented
       and any and all contracts of employment, and has made available to
       Mid-Peninsula any Board of Directors' minutes (or committee minutes)
       authorizing, approving or guaranteeing such Employee Plans and contracts;
       and
 
           (ii) All contributions, premiums or other payments due from Cupertino
       and CNB to (or under) any Employee Plans have been fully paid or
       adequately provided for on Cupertino's audited financial statements for
       the year ended December 31, 1995 or unaudited financial statements for
       the three months ended March 31, 1996. All accruals thereon (including,
       where appropriate, proportional accruals for partial periods) have been
       made in accordance with generally accepted accounting principles
       consistently applied on a reasonable basis; and
 
          (iii) Cupertino has disclosed in writing to Mid-Peninsula the names of
       each director, officer and employee of Cupertino and CNB; and
 
                                       16

          (iv) The Employee Plans have been administered where required in
       substantial compliance with ERISA, the IRC and the terms of such Employee
       Plans, and there is no pending or threatened litigation relating to any
       such Employee Plan; and
 
           (v) Cupertino and CNB have not offered in the past health benefits
       for retired employees; and
 
          (vi) Each Employee Plan is in full force and effect, and neither
       Cupertino, CNB nor any other party is in material default under any of
       them, and there have been no claims of default and there are no facts or
       conditions which if continued, or on notice, will result in a material
       default under any Employee Plans; and
 
          (vii) Cupertino has provided to Mid-Peninsula a list of all agreements
       or other understandings pursuant to which the consummation of the
       transactions contemplated hereby will (a) entitle any current or former
       employee or officer of Cupertino or CNB to severance pay, unemployment
       compensation or any other payment, or (b) accelerate the time of payment
       or vesting or increase the amount of compensation due any such employee
       or officer.
 
        o.  COLLECTIVE BARGAINING AND EMPLOYMENT AGREEMENTS.  Except as provided
    in this Agreement or as previously disclosed to Mid-Peninsula in writing,
    neither Cupertino nor CNB has any union or collective bargaining or written
    employment agreements, contracts or other agreements with any labor
    organization or with any member of management, or any management or
    consultation agreement not terminable at will by Cupertino or CNB without
    liability and no such contract or agreement has been requested by, or is
    under discussion by management with, any group of employees, any member of
    management or any other person. There are no material controversies pending
    between Cupertino or CNB and any current or former employees, and to the
    best of Cupertino's knowledge, there are no efforts presently being made by
    any labor union seeking to organize any of such employees.
 
        p.  COMPENSATION OF OFFICERS AND EMPLOYEES.  Except as previously
    disclosed to Mid-Peninsula in writing, (i) no officer or employee of
    Cupertino or CNB is receiving aggregate direct remuneration at a rate
    exceeding $60,000 per annum, and (ii) the consummation of the transactions
    contemplated by this Agreement and the Merger Agreement will not (either
    alone or upon the occurrence of any additional or further acts or events)
    result in any payment (whether of severance pay or otherwise) becoming due
    from Cupertino, CNB or Mid-Peninsula to any employee of Cupertino or CNB.
 
        q.  LEGAL ACTIONS AND PROCEEDINGS.  Except as previously disclosed to
    Mid-Peninsula in writing, neither Cupertino nor CNB is a party to, or so far
    as known to either of them, threatened with, and to Cupertino's knowledge,
    there is no reasonable basis for, any legal action or other proceeding or
    investigation before any court, any arbitrator of any kind or any government
    agency, and neither Cupertino nor CNB is subject to any potential adverse
    claim, the outcome of which could involve the payment or receipt by
    Cupertino or CNB of any amount in excess of $50,000, unless an insurer has
    agreed to defend against and pay the amount of any resulting liability
    without reservation, or, if any such legal action, proceeding, investigation
    or claim will not involve the payment by Cupertino or CNB of a monetary
    amount, which could materially adversely affect Cupertino or CNB or their
    business or property or the transactions contemplated hereby. Cupertino has
    no knowledge of any pending or threatened claims or charges under the
    Community Reinvestment Act, before the Equal Employment Opportunity
    Commission, the California Department of Fair Housing & Economic
    Development, the California Unemployment Appeals Board, or any federal or
    state human relations commission or agency. There is no labor dispute,
    strike, slow-down or stoppage pending or, to the best of the knowledge of
    Cupertino, threatened against Cupertino or CNB.
 
                                       17

        r.  EXECUTION AND DELIVERY OF THE AGREEMENT.
 
           (i) The execution and delivery of this Agreement and the Merger
       Agreement have been duly authorized by the Board of Directors of
       Cupertino and, when the principal terms of the Merger, this Agreement and
       the Merger Agreement have been duly approved by the affirmative vote of
       the holders of a majority of the outstanding Cupertino Shares at a
       meeting of shareholders duly called and held, the Merger, this Agreement
       and the Merger Agreement will be duly and validly authorized by all
       necessary corporate action on the part of Cupertino.
 
           (ii) This Agreement has been duly executed and delivered by Cupertino
       and (assuming due execution and delivery by Mid-Peninsula) constitutes,
       and the Merger Agreement, upon its execution and delivery by Cupertino
       (and assuming due execution and delivery by Mid-Peninsula) will
       constitute, a legal and binding obligation of Cupertino in accordance
       with its terms.
 
          (iii) The execution and delivery by Cupertino of this Agreement and
       the Merger Agreement and the consummation of the transactions herein and
       therein contemplated (a) do not violate any provision of the Articles of
       Incorporation or Articles of Association or Bylaws of Cupertino or CNB,
       respectively, or violate in any material respect any provision of federal
       or state law or any government rule or regulation (assuming (1) receipt
       of the Government Approvals, (2) receipt of the requisite Cupertino
       shareholder approval referred to in Section 4(r)(i) hereof, (3) due
       registration of the Bancorp Shares under the 1933 Act, and (4) receipt of
       appropriate permits or approvals under state securities or "blue sky"
       laws, and (b) do not require any consent of any person under, conflict in
       any material respect with or result in a material breach of, or
       accelerate the performance required by any of the terms of, any material
       debt instrument, lease, license, covenant, agreement or understanding to
       which Cupertino or CNB is a party or by which it is bound or any order,
       ruling, decree, judgment, arbitration award or stipulation to which
       Cupertino or CNB is subject, or constitute a material default thereunder
       or result in the creation of any lien, claim, security interest,
       encumbrance, charge, restriction or right of any third party of any kind
       whatsoever upon any of the properties or assets of Cupertino or CNB.
 
        s.  RETENTION OF BROKER OR CONSULTANT.  No broker, agent, finder,
    consultant or other party (other than legal, compliance, loan auditors and
    accounting advisors) has been retained by Cupertino or CNB or is entitled to
    be paid based upon any agreements, arrangements or understandings made by
    Cupertino or CNB in connection with any of the transactions contemplated by
    this Agreement or the Merger Agreement, except that Cupertino has engaged
    the firm of Sutro & Co. Incorporated to render an opinion regarding the
    fairness of the consideration to be received by Cupertino shareholders in
    the Merger. Cupertino has provided Mid-Peninsula with a true and accurate
    copy of its agreement(s) with Sutro & Co. Incorporated.
 
        t.  INSURANCE.  Cupertino and CNB are and continuously since their
    inception have been, insured with reputable insurers against all risks
    normally insured against by bank holding companies and banks, and all of the
    insurance policies and bonds maintained by Cupertino and CNB are in full
    force and effect, Cupertino and CNB are not in default thereunder and all
    material claims thereunder have been filed in due and timely fashion. In the
    best judgment of the management of Cupertino and CNB, such insurance
    coverage is adequate for Cupertino and CNB. Since December 31, 1995, there
    has not been any damage to, destruction of, or loss of any assets of
    Cupertino or CNB not covered by insurance that could materially and
    adversely affect the business, financial condition, properties, assets or
    results of operations of Cupertino or CNB.
 
        u.  LOAN LOSS RESERVES.  The allowance for loan losses in the Cupertino
    balance sheets dated December 31, 1995, March 31, 1996, and as of the
    Determination Date are and will be adequate in all material respects under
    the requirements of all applicable state and federal laws and regulations to
    provide for possible loan losses on outstanding loans, net of recoveries.
    Cupertino has disclosed to Mid-Peninsula in writing prior to the date
    hereof, and will promptly inform
 
                                       18

    Mid-Peninsula of the amounts of all loans, leases, other extensions of
    credit or commitments, or other interest-bearing assets of Cupertino and
    CNB, that have been classified as of the date hereof or hereafter by
    Cupertino or CNB management or Cupertino or CNB internal policy or
    procedure, any outside review examiner, accountant or any bank regulatory
    authority as "Other Loans Specially Mentioned," "Special Mention,"
    "Substandard," "Doubtful," or "Loss" or classified using categories or words
    with similar import in the case of loans (or that would have been so
    classified, in the case of other interest-bearing assets, had they been
    loans). Notwithstanding the above, Cupertino shall be under no obligation to
    disclose to Mid-Peninsula any such classification by any bank regulatory
    authority where such disclosure would violate any obligation of
    confidentiality of Cupertino or CNB imposed by such bank regulatory
    authority. Cupertino has furnished and will continue to furnish to
    Mid-Peninsula true and accurate information concerning the loan portfolio of
    Cupertino and CNB, and no material information with respect to the loan
    portfolio has been or will be withheld from Mid-Peninsula.
 
        v.  TRANSACTIONS WITH AFFILIATES.  Except in the Ordinary Course of
    Business, neither Cupertino nor CNB has extended credit, committed itself to
    extend credit, or transferred any asset to or assumed or guaranteed any
    liability of the employees or directors of Cupertino or CNB, or to any
    spouse or child of any of them, or to any of their "affiliates" or
    "associates" as such terms are defined in Rule 405 under the 1933 Act.
    Neither Cupertino nor CNB has entered into any other transactions with the
    employees or directors of Cupertino or CNB or any spouse or child of any of
    them, or any of their affiliates or associates, except as disclosed in
    writing to Mid-Peninsula. Any such transactions have been on terms no less
    favorable to Cupertino and CNB than those which would prevail in an
    arms-length transaction with an independent third party. Neither Cupertino
    nor CNB has violated any applicable regulation of any government agency or
    regulatory authority having jurisdiction over Cupertino or CNB in connection
    with any such transactions described in this subsection v.
 
        w.  INFORMATION IN MID-PENINSULA REGISTRATION STATEMENT.  The
    information pertaining to Cupertino which has been or will be furnished to
    Mid-Peninsula for or on behalf of Cupertino for inclusion in the
    Mid-Peninsula Registration Statement and the Joint Proxy
    Statement/Prospectus, or in the applications to be filed to obtain the
    Government Approvals (the "Applications"), does not and will not contain any
    untrue statement of any material fact or omit or will omit to state any
    material fact required to be stated therein or necessary to make the
    statements therein, in light of the circumstances under which they are made,
    not misleading; provided, however, that information of a later date shall be
    deemed to modify contrary information as of an earlier date. All financial
    statements of Cupertino included in the Mid-Peninsula Registration Statement
    and the Joint Proxy Statement/Prospectus, or the Applications, will present
    fairly the financial condition and results of operations of Cupertino at the
    dates and for the periods covered by such statements in accordance with
    generally accepted accounting principles consistently applied throughout the
    periods covered by such statements. Cupertino shall promptly advise
    Mid-Peninsula in writing if prior to the Effective Time of the Merger
    Cupertino shall obtain knowledge of any facts that would make it necessary
    to amend or supplement the Mid-Peninsula Registration Statement, the Joint
    Proxy Statement/Prospectus or any Application, in order to make the
    statements therein not misleading or to comply with applicable law or
    regulation.
 
        x.  ACCURACY AND EFFECTIVE DATE OF REPRESENTATIONS AND WARRANTIES,
    COVENANTS AND AGREEMENTS.  Each representation, warranty, covenant and
    agreement of Cupertino set forth in this Agreement shall be deemed to be
    made on and as of the date hereof (except to the extent that a
    representation or warranty is qualified as set forth in a Schedule
    corresponding in number with the applicable section of such representation
    or warranty and delivered on or before the Document Delivery Date, and upon
    such delivery it shall be deemed made on and as of the date of delivery),
    the Closing Date and the Effective Time of the Merger. No representation or
    warranty by Cupertino, and no statement by Cupertino in any certificate,
    agreement, schedule or other document furnished or to be furnished in
    connection with the transactions contemplated by this
 
                                       19

    Agreement or the Merger Agreement, was or will be inaccurate, incomplete or
    incorrect in any material respect as of the date furnished or contains or
    will contain any untrue statement of a material fact or omits or will omit
    to state any material fact necessary to make such representation, warranty
    or statement not misleading to Mid-Peninsula.
 
5.  REPRESENTATIONS AND WARRANTIES OF MID-PENINSULA.
 
    In the following representations and warranties, all references to assets,
liabilities, properties, rights, obligations, financial condition, operations,
knowledge, information and other characteristics of Mid-Peninsula shall be
deemed to include reference to those characteristics of MPB on a consolidated
basis, except as the context otherwise indicates or requires. Mid-Peninsula
represents and warrants to Cupertino that, except as set forth on a Schedule
delivered to Cupertino on or before the Document Delivery Date, in form and
substance satisfactory to Cupertino and corresponding in number with the
applicable section:
 
        a.  CORPORATE STATUS AND POWER TO ENTER INTO AGREEMENTS.  (i)
    Mid-Peninsula is a corporation duly incorporated, validly existing and in
    good standing under California law and is a registered bank holding company
    under the Bank Holding Company Act of 1956, as amended, (ii) subject to
    obtaining the Government Approvals and approval of the principal terms of
    the Merger by the Mid-Peninsula shareholders, Mid-Peninsula has all
    necessary corporate power to enter into this Agreement and the Merger
    Agreement and to carry out all of the terms and provisions hereof and
    thereof to be carried out by it, (iii) MPB holds a currently valid license
    issued by the Superintendent to engage in the commercial banking business in
    California at the locations at which it is licensed and currently conducts
    business, and (iv) neither Mid-Peninsula nor MPB is subject to any
    directive, resolution, memorandum of understanding or order of the FDIC,
    FRB, Superintendent or any other regulatory authority having jurisdiction
    over its business or any of its assets or properties. Neither the scope of
    the business of Mid-Peninsula or MPB nor the location of their properties
    requires either of them to be licensed to do business in any jurisdiction
    other than the State of California. MPB's deposits are insured by the FDIC
    to the maximum extent permitted by applicable law and regulation.
 
        b.  ARTICLES, BYLAWS, BOOKS AND RECORDS.  The copies of the Articles of
    Incorporation and Bylaws of Mid-Peninsula and MPB, respectively, heretofore
    delivered to Cupertino are complete and accurate copies thereof as in effect
    on the date hereof. The minute books of Mid-Peninsula and MPB made available
    to Cupertino contain a complete and accurate record of all meetings of
    Mid-Peninsula's and MPB's respective Boards of Directors (and committees
    thereof) and shareholders. The corporate books and records (including
    financial statements) of Mid-Peninsula and MPB fairly reflect the material
    transactions to which Mid-Peninsula and MPB are parties or by which their
    properties are subject or bound, and such books and records have been
    properly kept and maintained.
 
        c.  COMPLIANCE WITH LAWS, REGULATIONS AND DECREES.  Mid-Peninsula and
    MPB (i) have the corporate power to own or lease their properties and to
    conduct their business as currently conducted, (ii) have complied in all
    material respects with, and are not in material default of any laws,
    regulations, ordinances, orders or decrees applicable to the conduct of
    their business and the ownership of their properties, including but not
    limited to all federal and state laws (including but not limited to the Bank
    Secrecy Act), rules and regulations relating to the offer, sale or issuance
    of securities, and the operation of a commercial bank, other than where such
    noncompliance or default is not likely to result in a material limitation on
    the conduct of the business of Mid-Peninsula or MPB or is not likely to
    otherwise have a material adverse effect on Mid-Peninsula and MPB taken as a
    whole, (iii) have not failed to file with the proper federal, state, local
    or other authorities any material report or other document required to be
    filed, and (iv) have all approvals, authorizations, consents, licenses,
    clearances and orders of, and have currently effective all registrations
    with, all government agencies and regulatory authorities which are necessary
    to the business and operations of Mid-Peninsula and MPB as now being
    conducted.
 
                                       20

        d.  CAPITALIZATION.  The authorized capital stock of Mid-Peninsula
    consists of 6,000,000 shares of Mid-Peninsula common stock, no par value, of
    which 1,608,443 shares are duly authorized, validly issued, fully paid and
    nonassessable and currently outstanding, and 4,000,000 shares of
    Mid-Peninsula preferred stock of which no shares are outstanding. Said stock
    has been offered, sold and issued in compliance with all applicable
    securities laws. There are currently outstanding options to purchase 278,538
    shares of Mid-Peninsula common stock, at a weighted average exercise price
    of $12.84 per share, issued pursuant to the Mid-Peninsula Stock Option Plan.
    Said options were issued and, upon issuance in accordance with the terms of
    the outstanding options said shares shall be issued, in compliance with all
    applicable securities laws. Otherwise, there are no outstanding (i) options,
    agreements, calls or commitments of any character which would obligate
    Mid-Peninsula to issue, sell, pledge, assign or otherwise encumber or
    dispose of, or to purchase, redeem or otherwise acquire, any Bancorp common
    stock or any other equity security of Mid-Peninsula, or (ii) warrants or
    options relating to, rights to acquire, or debt or equity securities
    convertible into, shares of Bancorp common stock or any other equity
    security of Mid-Peninsula. The outstanding common stock of Mid-Peninsula is
    registered with the Securities and Exchange Commission (the "Commission")
    pursuant to Section 12(g) of the 1934 Act. Mid-Peninsula owns all of the
    outstanding equity securities of MPB. Except as collateral for outstanding
    loans held in their loan portfolios, neither Mid-Peninsula nor MPB owns,
    directly or indirectly, any equity interest in any bank (other than
    Mid-Peninsula's ownership of MPB), corporation or other entity.
 
        e.  TRADEMARKS AND TRADE NAMES.  To the best of the knowledge of
    Mid-Peninsula, Mid-Peninsula and MPB (i) own and have the exclusive right to
    use all Intellectual Property Rights used in or necessary for the conduct of
    their businesses as now or heretofore conducted; and (ii) are not infringing
    upon the Intellectual Property Rights of any other person or entity. No
    claim is pending or threatened by any person or entity against or otherwise
    affecting the use by Mid-Peninsula or MPB of any Intellectual Property
    Rights and, to the best of its knowledge, there is no valid basis for any
    such claim.
 
        f.  FINANCIAL STATEMENTS, REGULATORY REPORTS.  No financial statement or
    other document provided or to be provided to Cupertino as required by
    Section 3.3(j) hereof, as of the date of such document, contained, or as to
    documents to be delivered after the date hereof, will contain, any untrue
    statement of a material fact, or, at the date thereof, omitted or will omit
    to state a material fact necessary in order to make the statements contained
    therein, in light of the circumstances under which such statements were or
    will be made, not misleading; provided, however, that information as of a
    later date shall be deemed to modify contrary information as of any earlier
    date. Mid-Peninsula and MPB have filed all material documents and reports
    required to be filed by them with the FDIC, FRB, Superintendent, the
    Commission and any other government agency or regulatory authority having
    jurisdiction over their business, assets or properties. All such reports
    conform in all material respects with the requirements promulgated by such
    government agencies and regulatory authorities. All compliance or corrective
    action relating to Mid-Peninsula and MPB required by government agencies and
    regulatory authorities having jurisdiction over Mid-Peninsula or MPB has
    been taken. Except as disclosed in such statements, reports or documents,
    neither Mid-Peninsula nor MPB has received any notification, formally or
    informally, from any agency or department of any federal, state or local
    government or any regulatory authority or the staff thereof (a) asserting
    that it is not in compliance with any of the statutes, regulations or
    ordinances which such government or regulatory authority enforces, or (b)
    threatening to revoke any license, franchise, permit or government
    authorization. Mid-Peninsula and MPB have paid all assessments made or
    imposed by any government agency. Mid-Peninsula has delivered to Cupertino
    copies of all annual management letters and opinions, and has made available
    to Cupertino for inspection all reviews, correspondence and other documents
    in the files of Mid-Peninsula prepared by KPMG Peat Marwick LLP or any other
    certified public accountant engaged by Mid-Peninsula and delivered to
    Mid-Peninsula since December 31, 1990. The financial records of
    Mid-Peninsula have been, and are being and shall be, maintained in all
 
                                       21

    material respects in accordance with all applicable legal and accounting
    requirements sufficient to insure that all transactions reflected therein
    are, in all material respects, executed in accordance with management's
    general or specific authorization and recorded in conformity with generally
    accepted accounting principles at the time in effect. The data processing
    equipment, data transmission equipment, related peripheral equipment and
    software used by Mid-Peninsula in the operation of its business to generate
    and retrieve its financial records are adequate for the current needs of
    Mid-Peninsula.
 
        g.  TAX RETURNS.
 
           (i) Mid-Peninsula and/or MPB has timely filed all federal, state,
       county, local and foreign tax returns required to be filed by it,
       including, without limitation, estimated tax, use tax, excise tax, real
       property and personal property tax reports and returns, employer's
       withholding tax returns, other withholding tax returns and Federal
       Unemployment Tax Returns, and all other reports or other information
       required or requested to be filed by either of them, and each such
       return, report or other information was, when filed, complete and
       accurate in all material respects. Mid-Peninsula and/or MPB has paid all
       taxes, fees and other government charges, including any interest and
       penalties thereon, when they have become due, except those that are being
       contested in good faith, which contested matters have been disclosed to
       Cupertino. Mid-Peninsula and/or MPB has not been requested to give nor
       has it given any currently effective waivers extending the statutory
       period of limitation applicable to any tax return required to be filed by
       it for any period. There are no claims pending against Mid-Peninsula
       and/or MPB for any alleged deficiency in the payment of any taxes, and
       Mid-Peninsula does not know of any pending or threatened audits,
       investigations or claims for unpaid taxes or relating to any liability in
       respect of any taxes. There have been no events, including a change in
       ownership, that would result in a reappraisal and establishment of a new
       base-year full value for purposes of applicable provisions of the
       California Constitution, of any real property owned in whole or in part
       by Mid-Peninsula or MPB or to the best of Mid-Peninsula's knowledge, of
       any real property leased by Mid-Peninsula or MPB.
 
           (ii) Mid-Peninsula has heretofore delivered to Cupertino copies of
       all its tax returns with respect to taxes payable to the United States of
       America and the State of California for the fiscal years ended December
       31, 1995, 1994, 1993, 1992 and 1991.
 
          (iii) No consent has been filed relating to Mid-Peninsula pursuant to
       Section 341(f) of the IRC.
 
        h.  MATERIAL ADVERSE CHANGE.  Except as heretofore disclosed in writing
    by Mid-Peninsula to Cupertino, since December 31, 1995, there has been (i)
    no material adverse change in the business, assets, licenses, permits,
    franchises, results of operations or financial condition of Mid-Peninsula or
    MPB (whether or not in the Ordinary Course of Business), (ii) no change in
    any of the assets, licenses, permits or franchises of Mid-Peninsula or MPB
    that has had or can reasonably be expected to have a material adverse effect
    on any of the items listed in clause (h)(i) above, (iii) no damage,
    destruction, or other casualty loss (whether or not covered by insurance)
    that has had or can reasonably be expected to have a material adverse effect
    on any of the items listed in clause (h)(i) above, (iv) no amendment,
    modification, or termination of any existing, or entering into of any new,
    contract, agreement, plan, lease, license, permit or franchise that is
    material to the business, financial condition, assets, liabilities or
    operations of Mid-Peninsula and MPB, except in the Ordinary Course of
    Business, and (v) no disposition by Mid-Peninsula or MPB of one or more
    assets that, individually or in the aggregate, are material to Mid-Peninsula
    or MPB, except sales of assets in the Ordinary Course of Business.
 
        i.  NO UNDISCLOSED LIABILITIES.  Except for items for which reserves
    have been established in the unaudited balance sheets of Mid-Peninsula as of
    March 31, 1996, Mid-Peninsula has not incurred or discharged, and is not
    legally obligated with respect to, any indebtedness, liability (including,
    without limitation, a liability arising out of an indemnification,
    guarantee, hold
 
                                       22

    harmless or similar arrangement) or obligation (accrued or contingent,
    whether due or to become due, and whether or not subordinated to the claims
    of its general creditors), other than as a result of operations in the
    Ordinary Course of Business after such date. No agreement pursuant to which
    any loans or other assets have been or will be sold by Mid-Peninsula or MPB
    entitles the buyer of such loans or other assets, unless there is a material
    breach of a representation or covenant by Mid-Peninsula or MPB, to cause
    Mid-Peninsula or MPB to repurchase such loan or other asset or to pursue any
    other form of recourse against Mid-Peninsula or MPB. Neither Mid-Peninsula
    nor MPB has knowingly made or shall make any representation or covenant in
    any such agreement that contained or shall contain any untrue statement of a
    material fact or omitted or shall omit to state a material fact necessary in
    order to make the statements contained therein, in light of the
    circumstances under which such representations and/or covenants were made or
    shall be made, not misleading. No cash, stock or other dividend or any other
    distribution with respect to the Bancorp Shares has been declared, set aside
    or paid, nor have any of the Bancorp Shares been purchased, redeemed or
    otherwise acquired, directly or indirectly, by Mid-Peninsula since May 22,
    1996.
 
        j.  PROPERTIES AND LEASES.
 
           (i) Mid-Peninsula and MPB have good and marketable title, free and
       clear of all liens and encumbrances and the right of possession, subject
       to existing leaseholds, to all real properties and good title, free and
       clear of all liens and encumbrances, to all other property and assets,
       tangible and intangible, reflected in the Mid-Peninsula balance sheet as
       of March 31, 1996 (except property held as lessee under leases disclosed
       in writing prior to the date hereof and except personal property sold or
       otherwise disposed of since March 31, 1996, in the Ordinary Course of
       Business), except for (a) liens for taxes or assessments not delinquent,
       (b) such other liens and encumbrances and imperfections of title as do
       not materially affect the value of such property as reflected in the
       Mid-Peninsula balance sheet as of March 31, 1996, or as currently shown
       on the books and records of Mid-Peninsula and which do not interfere with
       or impair its present and continued use, or (c) exceptions disclosed in
       title reports and preliminary title reports, copies of which have been
       provided to Cupertino. All tangible properties of Mid-Peninsula and MPB
       conform in all material respects with all applicable ordinances,
       regulations and zoning laws. All tangible properties of Mid-Peninsula and
       MPB are in a good state of maintenance and repair and are adequate for
       the current business of Mid-Peninsula and MPB. No properties of
       Mid-Peninsula and MPB, and, to the best of Mid-Peninsula's knowledge, no
       properties in which Mid-Peninsula or MPB holds a collateral or contingent
       interest or purchase option, are the subject of any pending or threatened
       investigation, claim or proceeding relating to the use, storage or
       disposal on such property of or contamination of such property by any
       toxic or hazardous waste material or substance. To the best of
       Mid-Peninsula's knowledge, neither Mid-Peninsula nor MPB owns, possesses
       or has a collateral or contingent interest or purchase option in any
       properties or other assets which contain or have located within or
       thereon any hazardous or toxic waste material or substance unless the
       location of such hazardous or toxic waste material or other substance or
       its use thereon conforms in all material respects with all federal, state
       and local laws, rules, regulations or other provisions regulating the
       discharge of materials into the environment. As to any real property not
       owned or leased by Mid-Peninsula or MPB and held as security for a loan
       or in which Mid-Peninsula or MPB otherwise has an interest, neither
       Mid-Peninsula or MPB has controlled, directed or participated in the
       operation or management of any such real property or any facilities or
       enterprise conducted thereon, such that it has become an owner or
       operator of such real property under applicable environmental laws.
 
           (ii) All properties held by Mid-Peninsula or MPB under leases are
       held under valid, binding and enforceable leases, with such exceptions as
       are not material and do not interfere with the conduct of the business of
       Mid-Peninsula or MPB, and Mid-Peninsula and MPB
 
                                       23

       enjoy quiet and peaceful possession of such leased property. Neither
       Mid-Peninsula nor MPB is in material default in any respect under any
       material lease, agreement or obligation regarding its properties to which
       it is a party or by which it is bound.
 
          (iii) Except as disclosed to Cupertino in writing, all of
       Mid-Peninsula's and MPB's rights and obligations under the leases
       referred to in Section 5(j)(ii) above do not require the consent of any
       other party to the transaction contemplated by this Agreement and the
       Merger Agreement. Where required, Mid-Peninsula and MPB shall obtain,
       prior to the Effective Date, the consent of such parties to such
       transactions.
 
        k.  MATERIAL CONTRACTS.  Except as previously disclosed to Cupertino in
    writing and excluding loans, lines of credit, loan commitments or letters of
    credit to which Mid-Peninsula or MPB is a party, neither Mid-Peninsula nor
    MPB is a party to or bound by any contract or other agreement made in the
    Ordinary Course of Business which involves aggregate future payments by or
    to Mid-Peninsula or MPB of more than $20,000 and which is made for a fixed
    period expiring more than one year from the date hereof, and neither
    Mid-Peninsula nor MPB is a party to or bound by any agreement not made in
    the Ordinary Course of Business which is to be performed at or after the
    date hereof. Each of the contracts and agreements disclosed to Cupertino
    pursuant to this Section 5(k) is a legal and binding obligation (subject to
    applicable bankruptcy, insolvency and similar laws affecting creditors'
    rights generally and subject, as to enforceability, to equitable principles
    of general applicability), and no breach or default (and no condition which,
    with notice or passage of time, or both, could become a breach or default)
    exists with respect thereto.
 
        l.  CLASSIFIED LOANS.  Except as previously disclosed to Cupertino in
    writing, there are no loans presently owned by Mid-Peninsula or MPB that
    have been classified by Mid-Peninsula or MPB management or Mid-Peninsula or
    MPB internal policy or procedure, any outside review examiner, accountant or
    any bank regulatory authority as "Other Loans Specially Mentioned," "Special
    Mention," "Substandard," "Doubtful," or "Loss" or classified using
    categories or words with similar import and all loans or portions thereof so
    classified have been charged off to the extent required. Mid-Peninsula and
    MPB regularly review and appropriately classify their loans in accordance
    with all applicable legal and regulatory requirements and generally accepted
    banking practices. All loans and investments of Mid-Peninsula and MPB are
    legal, valid and binding obligations enforceable in accordance with their
    respective terms and are not subject to any setoffs, counterclaims or
    disputes (subject to applicable bankruptcy, insolvency and similar laws
    affecting creditors' rights generally and subject, as to enforceability, to
    equitable principles of general applicability), except as disclosed to
    Cupertino in writing or reserved for in the unaudited balance sheet of
    Mid-Peninsula as of March 31, 1996, and were duly authorized under and made
    in compliance with applicable federal and state laws and regulations.
    Neither Mid-Peninsula nor MPB has any extensions of credit, investments,
    guarantees, indemnification agreements or commitments for the same
    (including without limitation commitments to issue letters of credit, to
    create acceptances, or to repurchase securities, federal funds or other
    assets) other than those documented on the books and records of
    Mid-Peninsula and MPB.
 
        m.  RESTRICTIONS ON INVESTMENTS.  Except for pledges to secure public
    and trust deposits and repurchase agreements in the Ordinary Course of
    Business, none of the investments reflected in the Mid-Peninsula balance
    sheet as of March 31, 1996, and none of the investments made by Mid-
    Peninsula or MPB since March 31, 1996, is subject to any restriction,
    whether contractual or statutory, which materially impairs the ability of
    Mid-Peninsula or MPB to freely dispose of such investment at any time.
 
        n.  EMPLOYMENT BENEFIT PLANS/ERISA.
 
           (i) Mid-Peninsula has provided to Cupertino an accurate list setting
       forth all bonus, incentive compensation, profit-sharing, pension,
       retirement, stock purchase, stock option, deferred compensation,
       severance, hospitalization, medical, dental, vision, group insurance,
       death benefit, disability and other fringe benefit plans, trust
       agreements, arrangements and
 
                                       24

       commitments of Mid-Peninsula and MPB (including but not limited to any
       such plans, agreements, arrangements and commitments applicable to former
       employees or retired employees, or for which such persons are eligible)
       (collectively, "Employee Plans"), if any, together with copies of all
       such Employee Plans that are documented and any and all contracts of
       employment, and has made available to Cupertino any Board of Directors'
       minutes (or committee minutes) authorizing, approving or guaranteeing
       such Employee Plans and contracts; and
 
           (ii) All contributions, premiums or other payments due from
       Mid-Peninsula and MPB to (or under) any Employee Plans have been fully
       paid or adequately provided for on Mid-Peninsula's audited financial
       statements for the year ended December 31, 1995 or unaudited financial
       statements for the three months ended March 31, 1996. All accruals
       thereon (including, where appropriate, proportional accruals for partial
       periods) have been made in accordance with generally accepted accounting
       principles consistently applied on a reasonable basis; and
 
          (iii) Mid-Peninsula has disclosed in writing to Cupertino the names of
       each director, officer and employee of Mid-Peninsula and MPB; and
 
          (iv) The Employee Plans have been administered where required in
       substantial compliance with ERISA, the IRC and the terms of such Employee
       Plans, and there is no pending or threatened litigation relating to any
       such Employee Plan; and
 
           (v) Mid-Peninsula and MPB have not offered in the past health
       benefits for retired employees; and
 
          (vi) Each Employee Plan is in full force and effect, and neither
       Mid-Peninsula, MPB nor any other party is in material default under any
       of them, and there have been no claims of default and there are no facts
       or conditions which if continued, or on notice, will result in a material
       default under any Employee Plans; and
 
          (vii) Mid-Peninsula has provided to Cupertino a list of all agreements
       or other understandings pursuant to which the consummation of the
       transactions contemplated hereby will (a) entitle any current or former
       employee or officer of Mid-Peninsula or MPB to severance pay,
       unemployment compensation or any other payment, or (b) accelerate the
       time of payment or vesting or increase the amount of compensation due any
       such employee or officer.
 
        o.  COLLECTIVE BARGAINING AND EMPLOYMENT AGREEMENTS.  Except as provided
    in this Agreement or as previously disclosed to Cupertino in writing,
    neither Mid-Peninsula nor MPB has any union or collective bargaining or
    written employment agreements, contracts or other agreements with any labor
    organization or with any member of management, or any management or
    consultation agreement not terminable at will by Mid-Peninsula or MPB
    without liability and no such contract or agreement has been requested by,
    or is under discussion by management with, any group of employees, any
    member of management or any other person. There are no material
    controversies pending between Mid-Peninsula or MPB and any current or former
    employees, and to the best of Mid-Peninsula's knowledge, there are no
    efforts presently being made by any labor union seeking to organize any of
    such employees.
 
        p.  COMPENSATION OF OFFICERS AND EMPLOYEES.  Except as previously
    disclosed to Cupertino in writing, (i) no officer or employee of
    Mid-Peninsula or MPB is receiving aggregate direct remuneration at a rate
    exceeding $60,000 per annum, and (ii) the consummation of the transactions
    contemplated by this Agreement and the Merger Agreement will not (either
    alone or upon the occurrence of any additional or further acts or events)
    result in any payment (whether of severance pay or otherwise) becoming due
    from Mid-Peninsula, MPB or Cupertino to any employee of Mid-Peninsula or
    MPB.
 
                                       25

        q.  LEGAL ACTIONS AND PROCEEDINGS.  Except as previously disclosed to
    Cupertino in writing, neither Mid-Peninsula nor MPB is a party to, or so far
    as known to either of them, threatened with, and to Mid-Peninsula's
    knowledge, there is no reasonable basis for, any legal action or other
    proceeding or investigation before any court, any arbitrator of any kind or
    any government agency, and neither Mid-Peninsula nor MPB is subject to any
    potential adverse claim, the outcome of which could involve the payment or
    receipt by Mid-Peninsula or MPB of any amount in excess of $50,000, unless
    an insurer has agreed to defend against and pay the amount of any resulting
    liability without reservation, or, if any such legal action, proceeding,
    investigation or claim will not involve the payment by Mid-Peninsula or MPB
    of a monetary amount, which could materially adversely affect Mid-Peninsula
    or MPB or their business or property or the transactions contemplated
    hereby. Mid-Peninsula has no knowledge of any pending or threatened claims
    or charges under the Community Reinvestment Act, before the Equal Employment
    Opportunity Commission, the California Department of Fair Housing & Economic
    Development, the California Unemployment Appeals Board, or any federal or
    state human relations commission or agency. There is no labor dispute,
    strike, slow-down or stoppage pending or, to the best of the knowledge of
    Mid-Peninsula, threatened against Mid-Peninsula or MPB.
 
        r.  EXECUTION AND DELIVERY OF THE AGREEMENT.
 
           (i) The execution and delivery of this Agreement and the Merger
       Agreement have been duly authorized by the Board of Directors of
       Mid-Peninsula and, when the principal terms of the Merger, this Agreement
       and the Merger Agreement have been duly approved by the affirmative vote
       of the holders of a majority of the outstanding Bancorp Shares at a
       meeting of shareholders duly called and held, the Merger, this Agreement
       and the Merger Agreement will be duly and validly authorized by all
       necessary corporate action on the part of Mid-Peninsula.
 
           (ii) This Agreement has been duly executed and delivered by
       Mid-Peninsula and (assuming due execution and delivery by Cupertino)
       constitutes, and the Merger Agreement, upon its execution and delivery by
       Mid-Peninsula (and assuming due execution and delivery by Cupertino) will
       constitute, a legal and binding obligation of Mid-Peninsula in accordance
       with its terms.
 
          (iii) The execution and delivery by Mid-Peninsula of this Agreement
       and the Merger Agreement and the consummation of the transactions herein
       and therein contemplated (a) do not violate any provision of the Articles
       of Incorporation or Bylaws of Mid-Peninsula or MPB, respectively, or
       violate in any material respect any provision of federal or state law or
       any government rule or regulation (assuming (1) receipt of the Government
       Approvals, (2) receipt of the requisite Mid-Peninsula shareholder
       approval referred to in Section 5(r)(i) hereof, (3) due registration of
       the Bancorp Shares under the 1933 Act, and (4) receipt of appropriate
       permits or approvals under state securities or "blue sky" laws, and (b)
       do not require any consent of any person under, conflict in any material
       respect with or result in a material breach of, or accelerate the
       performance required by any of the terms of, any material debt
       instrument, lease, license, covenant, agreement or understanding to which
       Mid-Peninsula or MPB is a party or by which it is bound or any order,
       ruling, decree, judgment, arbitration award or stipulation to which
       Mid-Peninsula or MPB is subject, or constitute a material default
       thereunder or result in the creation of any lien, claim, security
       interest, encumbrance, charge, restriction or right of any third party of
       any kind whatsoever upon any of the properties or assets of Mid-Peninsula
       or MPB.
 
        s.  RETENTION OF BROKER OR CONSULTANT.  No broker, agent, finder,
    consultant or other party (other than legal, compliance, loan auditors and
    accounting advisors) has been retained by Mid-Peninsula or MPB or is
    entitled to be paid based upon any agreements, arrangements or
    understandings made by Mid-Peninsula or MPB in connection with any of the
    transactions contemplated by this Agreement or the Merger Agreement, except
    that Mid-Peninsula has engaged the
 
                                       26

    firm of Alex. Brown & Sons Incorporated to act as its financial advisor and
    to render an opinion regarding the fairness of the Conversion Ratio in the
    Merger, from a financial point of view, to Mid-Peninsula shareholders.
    Mid-Peninsula has provided Cupertino with a true and accurate copy of its
    agreement(s) with Alex. Brown & Sons Incorporated.
 
        t.  INSURANCE.  Mid-Peninsula and MPB are and continuously since their
    inception have been, insured with reputable insurers against all risks
    normally insured against by bank holding companies and banks, and all of the
    insurance policies and bonds maintained by Mid-Peninsula and MPB are in full
    force and effect, Mid-Peninsula and MPB are not in default thereunder and
    all material claims thereunder have been filed in due and timely fashion. In
    the best judgment of the management of Mid-Peninsula and MPB, such insurance
    coverage is adequate for Mid-Peninsula and MPB. Since December 31, 1995,
    there has not been any damage to, destruction of, or loss of any assets of
    Mid-Peninsula or MPB not covered by insurance that could materially and
    adversely affect the business, financial condition, properties, assets or
    results of operations of Mid-Peninsula or MPB.
 
        u.  LOAN LOSS RESERVES.  The allowance for loan losses in the
    Mid-Peninsula balance sheets dated December 31, 1995, March 31, 1996, and as
    of the Determination Date are and will be adequate in all material respects
    under the requirements of all applicable state and federal laws and
    regulations to provide for possible loan losses on outstanding loans, net of
    recoveries. Mid-Peninsula has disclosed to Cupertino in writing prior to the
    date hereof, and will promptly inform Cupertino of the amounts of all loans,
    leases, other extensions of credit or commitments, or other interest-bearing
    assets of Mid-Peninsula and MPB, that have been classified as of the date
    hereof or hereafter by Mid-Peninsula or MPB management or Mid-Peninsula or
    MPB internal policy or procedure, any outside review examiner, accountant or
    any bank regulatory authority as "Other Loans Specially Mentioned," "Special
    Mention," "Substandard," "Doubtful," or "Loss" or classified using
    categories or words with similar import in the case of loans (or that would
    have been so classified, in the case of other interest-bearing assets, had
    they been loans). Notwithstanding the above, Mid-Peninsula shall be under no
    obligation to disclose to Cupertino any such classification by any bank
    regulatory authority, where such disclosure would violate any obligation of
    confidentiality of Mid-Peninsula or MPB imposed by such bank regulatory
    authority. Mid-Peninsula has furnished and will continue to furnish to
    Cupertino true and accurate information concerning the loan portfolio of
    Mid-Peninsula and MPB, and no material information with respect to the loan
    portfolio has been or will be withheld from Cupertino.
 
        v.  TRANSACTIONS WITH AFFILIATES.  Except in the Ordinary Course of
    Business, neither Mid-Peninsula nor MPB has extended credit, committed
    itself to extend credit, or transferred any asset to or assumed or
    guaranteed any liability of the employees or directors of Mid-Peninsula or
    MPB, or to any spouse or child of any of them, or to any of their
    "affiliates" or "associates" as such terms are defined in Rule 405 under the
    1933 Act. Neither Mid-Peninsula nor MPB has entered into any other
    transactions with the employees or directors of Mid-Peninsula or MPB or any
    spouse or child of any of them, or any of their affiliates or associates,
    except as disclosed in writing to Cupertino. Any such transactions have been
    on terms no less favorable to Mid-Peninsula and MPB than those which would
    prevail in an arms-length transaction with an independent third party.
    Neither Mid-Peninsula nor MPB has violated any applicable regulation of any
    government agency or regulatory authority having jurisdiction over
    Mid-Peninsula or MPB in connection with any such transactions described in
    this subsection v.
 
        w.  INFORMATION IN MID-PENINSULA REGISTRATION STATEMENT.  The
    information pertaining to Mid-Peninsula which has been or will be included
    in the Mid-Peninsula Registration Statement and the Joint Proxy
    Statement/Prospectus, or in the Applications to be filed to obtain the
    Government Approvals, does not and will not contain any untrue statement of
    any material fact or omit or will omit to state any material fact required
    to be stated therein or necessary to make the statements therein, in light
    of the circumstances under which they are made, not misleading;
 
                                       27

    provided, however, that information of a later date shall be deemed to
    modify contrary information as of an earlier date. All financial statements
    of Mid-Peninsula included in the Mid-Peninsula Registration Statement and
    the Joint Proxy Statement/Prospectus, or the Applications, will present
    fairly the financial condition and results of operations of Mid-Peninsula at
    the dates and for the periods covered by such statements in accordance with
    generally accepted accounting principles consistently applied throughout the
    periods covered by such statements. Mid-Peninsula shall promptly advise
    Cupertino in writing if prior to the Effective Time of the Merger Mid-
    Peninsula shall obtain knowledge of any facts that would make it necessary
    to amend or supplement the Mid-Peninsula Registration Statement, the Joint
    Proxy Statement/Prospectus or any Application, in order to make the
    statements therein not misleading or to comply with applicable law or
    regulation.
 
        x.  ACCURACY AND EFFECTIVE DATE OF REPRESENTATIONS AND WARRANTIES,
    COVENANTS AND AGREEMENTS.  Each representation, warranty, covenant and
    agreement of Mid-Peninsula set forth in this Agreement shall be deemed to be
    made on and as of the date hereof (except to the extent that a
    representation or warranty is qualified as set forth in a Schedule
    corresponding in number with the applicable section of such representation
    or warranty and delivered on or before the Document Delivery Date, and upon
    such delivery it shall be deemed made on and as of the date of delivery),
    the Closing Date and the Effective Time of the Merger. No representation or
    warranty by Mid-Peninsula, and no statement by Mid-Peninsula in any
    certificate, agreement, schedule or other document furnished or to be
    furnished in connection with the transactions contemplated by this Agreement
    or the Merger Agreement, was or will be inaccurate, incomplete or incorrect
    in any material respect as of the date furnished or contains or will contain
    any untrue statement of a material fact or omits or will omit to state any
    material fact necessary to make such representation, warranty or statement
    not misleading to Cupertino.
 
6.  SECURITIES ACT OF 1933; SECURITIES EXCHANGE ACT OF 1934.
 
        a.  PREPARATION AND FILING OF REGISTRATION STATEMENT.  Mid-Peninsula
    shall promptly prepare and file with the Commission (i) a registration
    statement on the appropriate form (the "Mid-Peninsula Registration
    Statement") under and pursuant to the provisions of the 1933 Act for the
    purpose of registering a sufficient number of Mid-Peninsula Shares to
    complete the exchange of Bancorp Shares for the outstanding Cupertino Shares
    pursuant to the Conversion Ratio and the provisions of Section 2.1 above,
    and (ii) in sufficient time to be effective on or before the Effective Time
    of the Merger one or more registration statements or amendments to existing
    registration statements under the 1933 Act for the purpose of registering
    the maximum number of Bancorp Shares to which the holders of Substitute
    Options may be entitled pursuant to Section 2.6 above at or after the
    Effective Time of the Merger. Mid-Peninsula shall promptly prepare a Joint
    Proxy Statement/Prospectus for the purpose of submitting the principal terms
    of the Merger, this Agreement and the Merger Agreement to the shareholders
    of Mid-Peninsula and Cupertino for approval. Cupertino shall cooperate in
    all reasonable respects with regard to the preparation of the Joint Proxy
    Statement/Prospectus. The Joint Proxy Statement/Prospectus in definitive
    form is expected to serve as the prospectus to be included in the
    Mid-Peninsula Registration Statement. Mid-Peninsula and Cupertino shall each
    provide promptly to the other such information concerning its business and
    financial condition and affairs as may be required or appropriate for
    inclusion in the Mid-Peninsula Registration Statement or the Joint Proxy
    Statement/Prospectus, and shall cause its counsel and auditors to cooperate
    with the other's counsel and auditors in the preparation of the
    Mid-Peninsula Registration Statement and the Joint Proxy Statement/
    Prospectus.
 
        b.  EFFECTIVENESS OF REGISTRATION STATEMENT.  Mid-Peninsula and
    Cupertino shall use their best efforts to have the Mid-Peninsula
    Registration Statement and any amendments or supplements thereto declared
    effective under the 1933 Act as soon as practicable, and thereafter Mid-
 
                                       28

    Peninsula and Cupertino shall distribute the Joint Proxy
    Statement/Prospectus to holders of their respective common stock in
    accordance with applicable laws and the Articles of Incorporation and Bylaws
    of each.
 
        c.  SALES AND RESALES OF COMMON STOCK.  Mid-Peninsula shall not be
    required to maintain the effectiveness of the Mid-Peninsula Registration
    Statement for the purpose of sale or resale of the Bancorp Shares by any
    person.
 
        d.  RULE 145.  Securities representing Bancorp Shares issued to
    affiliates of Cupertino (as determined by counsel to Mid-Peninsula and
    Cupertino) under Rule 145 of the 1933 Act pursuant to the Merger Agreement
    may be subject to stop transfer orders which confirm that such securities
    representing Bancorp Shares have been issued or transferred to the
    registered holder as the result of a transaction to which Rule 145 under the
    1933 Act applies, and that such securities may not be sold, hypothecated,
    transferred or assigned, and the issuer or its transfer agent shall not be
    required to give effect to any attempted sale, hypothecation, transfer or
    assignment, except (i) pursuant to a then current effective registration
    statement under the 1933 Act, (ii) in a transaction permitted by Rule 145 as
    to which the issuer has, in the opinion of its counsel, received reasonably
    satisfactory evidence of compliance with the provisions of Rule 145, or
    (iii) in a transaction which, in the opinion of counsel satisfactory to the
    issuer or as described in a "no action" or interpretive letter from the
    staff of the Securities and Exchange Commission, is not required to be
    registered under the 1933 Act.
 
7.  CONDITIONS TO THE OBLIGATIONS OF MID-PENINSULA.
 
    The obligations of Mid-Peninsula under this Agreement are, at its option,
subject to fulfillment at or prior to the Effective Time of the Merger of each
of the following conditions; provided, however, that any one or more of such
conditions may be waived by the Board of Directors of Mid-Peninsula at any time
at or prior to the Effective Time of the Merger:
 
        a.  REPRESENTATIONS AND WARRANTIES.  The representations and warranties
    of Cupertino in Section 4 hereof shall be true and correct in all material
    respects on and as of the date of this Agreement (except to the extent that
    a representation or warranty is qualified as set forth in a Schedule
    corresponding in number with the applicable section of such representation
    or warranty and delivered on or before the Document Delivery Date, and upon
    such delivery it shall be deemed made on and as of the date of delivery),
    the Closing Date and the Effective Time of the Merger, with the same effect
    as though such representations and warranties had been made on and as of
    each such date or time except as to any representation or warranty which
    specifically relates to an earlier date or time.
 
        b.  COMPLIANCE AND PERFORMANCE UNDER AGREEMENT.  Cupertino shall have
    performed and complied in all material respects with all terms, agreements,
    covenants and conditions of this Agreement and the Merger Agreement required
    to be performed or complied with by it at or prior to the Effective Time of
    the Merger.
 
        c.  MATERIAL ADVERSE CHANGE.  No materially adverse change shall have
    occurred since March 31, 1996, in the business, financial condition, results
    of operations or assets of Cupertino and CNB, taken as a whole, and neither
    Cupertino nor CNB shall be a party to or threatened with, and to the best of
    Cupertino's knowledge there is no reasonable basis for, any legal action or
    other proceeding before any court, any arbitrator of any kind or any
    government agency, which legal action or proceeding, in the reasonable
    judgment of Mid-Peninsula, could materially adversely affect Cupertino and
    CNB, taken as a whole, or their business, financial condition, results of
    operations or assets.
 
        d.  APPROVAL OF AGREEMENT.  The principal terms of the Merger, this
    Agreement and the Merger Agreement shall have been duly approved by (i) the
    affirmative vote or consent of the holders of a majority of the outstanding
    Cupertino Shares and (ii) the affirmative vote or consent of the holders of
    a majority of the outstanding Mid-Peninsula Shares.
 
                                       29

        e.  OFFICER'S CERTIFICATE.  Mid-Peninsula shall have received a
    certificate, dated the Effective Date, signed on behalf of Cupertino by its
    President and Chief Financial Officer, in substantially the form delivered
    to Mid-Peninsula on or before the Document Delivery Date.
 
        f.  OPINION OF COUNSEL.  Manatt, Phelps & Phillips, LLP, counsel to
    Cupertino, shall have delivered to Mid-Peninsula its opinion dated the
    Effective Date in substantially the form delivered to Mid-Peninsula on or
    before the Document Delivery Date.
 
        g.  ABSENCE OF PROCEEDINGS.  No legal, administrative, arbitration,
    investigatory or other proceeding by any government agency or regulatory
    authority shall have been instituted or threatened to restrain or prohibit
    the Merger or the transactions contemplated by this Agreement.
 
        h.  EFFECTIVENESS OF REGISTRATION STATEMENT.  The Mid-Peninsula
    Registration Statement and any amendments or supplements thereto shall have
    become effective under the 1933 Act, no stop order suspending the
    effectiveness of such Registration Statement shall be in effect and no
    proceedings for such purpose shall have been initiated or threatened by or
    before the Commission and the Mid-Peninsula Shares registered thereby shall
    have received all state securities and "blue sky" permits or approvals
    required to consummate the transactions contemplated by this Agreement and
    the Merger Agreement.
 
        i.  GOVERNMENT APPROVALS.  All Government Approvals shall be in effect,
    and all conditions or requirements prescribed by law or by any such
    Approvals shall have been satisfied; provided, however, that no Government
    Approval shall be deemed to have been received if it shall require the
    divestiture or cessation of any of the present businesses or operations
    conducted by either of the parties hereto or shall impose any other
    condition or requirement, which condition or requirement Mid-Peninsula in
    its reasonable judgment shall deem to be materially burdensome (in which
    case Mid-Peninsula shall promptly notify Cupertino). For purposes of this
    agreement no condition or requirement shall be deemed to be "materially
    burdensome" if such condition or requirement does not materially differ from
    conditions or requirements regularly imposed in orders approving
    transactions of the type contemplated by this Agreement and compliance with
    such condition or requirement would not:
 
           (i) require the taking of any action materially inconsistent with the
       manner in which Mid-Peninsula or Cupertino has conducted its business
       previously;
 
           (ii) have a material adverse effect upon the business, financial
       condition or results of operations of Mid-Peninsula or Cupertino; or
 
          (iii) preclude satisfaction of any of the conditions to consummation
       of the transactions contemplated by this Agreement.
 
        j.  TAX OPINION.  Bronson, Bronson & McKinnon LLP, Mid-Peninsula's
    counsel, shall have delivered to Mid-Peninsula and Cupertino a tax opinion
    subject to customary assumptions and exceptions included in such opinions
    and the prior delivery of certificates from Cupertino and Mid-Peninsula in
    form and substance reasonably satisfactory to Mid-Peninsula's counsel,
    substantially to the effect that under federal income tax law and California
    income and franchise tax law:
 
           (i) The Merger will not result in any recognized gain or loss to
       Mid-Peninsula or Cupertino;
 
           (ii) Except for any cash received in lieu of any fractional share, no
       gain or loss will be recognized by holders of Cupertino Shares who
       receive Bancorp Shares in exchange for the Cupertino Shares which they
       hold;
 
                                       30

          (iii) The holding period of Bancorp Shares exchanged for Cupertino
       Shares will include the holding period of the Cupertino Shares for which
       they are exchanged, assuming the Cupertino Shares are capital assets in
       the hands of the holder thereof at the Effective Date; and
 
          (iv) The basis of the Bancorp Shares received in the exchange will be
       the same as the basis of the Cupertino Shares for which they are
       exchanged, less any basis attributable to fractional shares for which
       cash is received.
 
        k.  ACCOUNTANT'S COMFORT LETTERS.  On or prior to the date of
    effectiveness of the Mid-Peninsula Registration Statement, Mid-Peninsula
    shall have received a comfort letter addressed to Mid-Peninsula from Coopers
    & Lybrand LLP, independent public accountants for Cupertino, in form and
    substance satisfactory to Mid-Peninsula and its counsel. Mid-Peninsula shall
    also have received from Coopers & Lybrand LLP a comfort letter dated the
    Effective Date, in form and substance satisfactory to Mid-Peninsula and its
    counsel, as to such matters, as of a specified date not more than five (5)
    business days prior to the Effective Date, as Mid-Peninsula may reasonably
    request.
 
        l.  DISSENTING SHARES.  Holders of not more than nine percent (9%) of
    the outstanding Bancorp Shares and Cupertino Shares shall have perfected
    dissenter's rights pursuant to Chapter 13 of the California General
    Corporation Law.
 
        m.  UNAUDITED FINANCIALS.  Not later than five (5) business days prior
    to the Effective Date, Cupertino shall have furnished Mid-Peninsula a copy
    of its most recently prepared unaudited month-end consolidated financial
    statements, including a balance sheet and statement of income of Cupertino.
 
        n.  AFFILIATE AGREEMENTS.  Mid-Peninsula shall have received signed
    affiliate agreements on or before the Document Delivery Date, from each
    person who, in the opinion of Cupertino's and Mid-Peninsula's counsel, might
    be deemed to be an affiliate of Cupertino or Mid-Peninsula under Rule 144 or
    145 of the 1933 Act. The agreements will include provisions restricting
    certain actions by an affiliate related to Cupertino Shares or Mid-Peninsula
    and/or Bancorp Shares, including the sale, purchase, acquisition or transfer
    of Cupertino Shares or Mid-Peninsula and/or Bancorp Shares in a manner which
    may render pooling-of-interests accounting treatment unavailable in the
    Merger.
 
        o.  CLOSING DOCUMENTS.  Mid-Peninsula shall have received such
    certificates and other closing documents as counsel for Mid-Peninsula shall
    reasonably request.
 
        p.  CONSENTS.  Cupertino shall have received, or Mid-Peninsula shall
    have satisfied itself that Cupertino will receive, all consents of third
    parties as may be required including consents of other parties to and
    required by material mortgages, notes, leases, franchises, agreements,
    licenses and permits applicable to Cupertino and CNB, in each case in form
    and substance reasonably satisfactory to Mid-Peninsula and its counsel, and
    no such consent or license or permit shall have been withdrawn or suspended.
 
        q.  FAIRNESS OPINION.  The Board of Directors of Mid-Peninsula shall
    have received an opinion of Alex. Brown & Sons Incorporated, dated the date
    of this Agreement and the date of mailing or a date within three (3) days
    prior to the date of mailing the Joint Proxy Statement/ Prospectus, to the
    effect that the Conversion Ratio in the Merger is fair, from a financial
    point of view, to Mid-Peninsula shareholders, and such opinion shall not
    have been withdrawn by the Effective Time of the Merger.
 
        r.  ACCOUNTING TREATMENT.  Mid-Peninsula shall have received a letter
    from KPMG Peat Marwick LLP, subject to customary qualifications and receipt
    of such certificates as may reasonable and customary in connection with such
    letters, satisfactory in form and substance to Mid-Peninsula and its
    counsel, to the effect that the Merger shall qualify for the
    pooling-of-interests
 
                                       31

    method of accounting in accordance with generally accepted accounting
    principles and all applicable rules, regulations and policies of the
    Commission. There shall have been no determination by any court, tribunal,
    regulatory authority or other government agency, that the Merger fails or
    will fail to qualify for pooling-of-interests accounting treatment.
 
        s.  SHAREHOLDER AGREEMENTS.  Mid-Peninsula and Cupertino shall have
    received signed shareholder agreements from members of the Boards of
    Directors and the executive officers of Mid-Peninsula and Cupertino on or
    before the Document Delivery Date, pursuant to which each such person in
    their capacity as a shareholder commits to vote their Mid-Peninsula Shares
    or Cupertino Shares in favor of the Merger and the transactions contemplated
    thereby and pursuant to this Agreement and the Merger Agreement, and to
    recommend to shareholders, subject to the exercise of fiduciary duties, that
    they vote in favor of the Merger and the transactions contemplated thereby
    and pursuant to this Agreement and the Merger Agreement.
 
        t.  PERFORMANCE TESTS.  As of the Determination Date, Closing Date and
    the Effective Date, Cupertino and CNB on a consolidated basis shall have (i)
    total shareholders' equity and leverage, tier 1 and total risk-based capital
    ratios, respectively, in amounts required to comply with the "well
    capitalized" category of applicable FDIC regulations, (ii) total reserves
    for losses on outstanding loans to net loans equal to 1.60%, and (iii) total
    shareholders' equity of not less than Twenty Million Dollars ($20,000,000).
 
        u.  STOCK OPTION AGREEMENT.  Mid-Peninsula shall have received a signed
    and dated stock option agreement from Cupertino on or before the Document
    Delivery Date, granting an option to Mid-Peninsula to acquire up to nineteen
    percent (19%) of the Cupertino Shares in the event of a Business Combination
    between Cupertino and any third party.
 
        v.  NASDAQ LISTING.  Mid-Peninsula shares shall have been listed with
    the Nasdaq Stock Market for trading on the Nasdaq National Market System and
    Mid-Peninsula shall have taken all necessary action to similarly list
    Bancorp Shares under a symbol mutually agreed upon by the parties to be
    effective from and after the Effective Time of the Merger.
 
        w.  DEBENTURE AGREEMENT.  The supplemental debenture agreement to be
    delivered pursuant to Section 3.1 of this Agreement shall have been signed
    and delivered to Cupertino together with an opinion of Manatt, Phelps &
    Phillips, LLP, in form and substance reasonably satisfactory to Cupertino,
    Mid-Peninsula and their respective counsel.
 
8.  CONDITIONS TO THE OBLIGATIONS OF CUPERTINO.
 
    The obligations of Cupertino under this Agreement are, at its option,
subject to the fulfillment at or prior to the Effective Time of the Merger of
each of the following conditions provided, however, that any one or more of such
conditions may be waived by the Board of Directors of Cupertino at any time at
or prior to the Effective Time of the Merger:
 
        a.  REPRESENTATIONS AND WARRANTIES.  The representations and warranties
    of Mid-Peninsula in Section 5 hereof shall be true and correct in all
    material respects on and as of the date of this Agreement (except to the
    extent that a representation or warranty is qualified as set forth in a
    Schedule corresponding in number with the applicable section of such
    representation or warranty and delivered on or before the Document Delivery
    Date, and upon such delivery it shall be deemed made on and as of the date
    of delivery), the Closing Date and the Effective Time of the Merger, with
    the same effect as though such representations and warranties had been made
    on and as of each such date or time except as to any representation or
    warranty which specifically relates to an earlier date or time.
 
        b.  COMPLIANCE AND PERFORMANCE UNDER AGREEMENT.  Mid-Peninsula shall
    have performed and complied in all material respects with all terms,
    agreements, covenants and conditions of this Agreement and the Merger
    Agreement required to be performed or complied with by it at or prior to the
    Effective Time of the Merger.
 
                                       32

        c.  MATERIAL ADVERSE CHANGE.  No materially adverse change shall have
    occurred since March 31, 1996, in the business, financial condition, results
    of operations or assets of Mid-Peninsula and MPB, taken as a whole, and
    neither Mid-Peninsula nor MPB shall be a party to or threatened with, and to
    the best of Mid-Peninsula's knowledge there is no reasonable basis for, any
    legal action or other proceeding before any court, any arbitrator of any
    kind or any government agency, which legal action or proceeding, in the
    reasonable judgment of Cupertino, could materially adversely affect
    Mid-Peninsula and MPB, taken as a whole, or their business, financial
    condition, results of operations or assets.
 
        d.  APPROVAL OF AGREEMENT.  The principal terms of the Merger, this
    Agreement and the Merger Agreement shall have been duly approved by (i) the
    affirmative vote or consent of the holders of a majority of the outstanding
    Mid-Peninsula Shares and (ii) the affirmative vote or consent of the holders
    of a majority of the outstanding Cupertino Shares.
 
        e.  OFFICER'S CERTIFICATE.  Cupertino shall have received a certificate,
    dated the Effective Date, signed on behalf of Mid-Peninsula by its President
    and Chief Financial Officer, in substantially the form delivered to
    Cupertino on or before the Document Delivery Date.
 
        f.  OPINION OF COUNSEL.  Bronson, Bronson & McKinnon LLP,
    Mid-Peninsula's counsel, shall have delivered to Cupertino its opinion dated
    the Effective Date in substantially the form delivered to Cupertino on or
    before the Document Delivery Date.
 
        g.  ABSENCE OF PROCEEDINGS.  No legal, administrative, arbitration,
    investigatory or other proceeding by any government agency or regulatory
    authority shall have been instituted or threatened to restrain or prohibit
    the Merger or the transactions contemplated by this Agreement.
 
        h.  EFFECTIVENESS OF REGISTRATION STATEMENT.  The Mid-Peninsula
    Registration Statement and any amendments or supplements thereto shall have
    become effective under the 1933 Act, no stop order suspending the
    effectiveness of such Registration Statement shall be in effect and no
    proceedings for such purpose shall have been initiated or threatened by or
    before the Commission and the Bancorp Shares registered thereby shall have
    received all state securities and "blue sky" permits or approvals required
    to consummate the transactions contemplated by this Agreement and the Merger
    Agreement.
 
        i.  GOVERNMENT APPROVALS.  All Government Approvals shall be in effect,
    and all conditions or requirements prescribed by law or by any such
    Approvals shall have been satisfied; provided, however, that no Government
    Approval shall be deemed to have been received if it shall require the
    divestiture or cessation of any of the present businesses or operations
    conducted by either of the parties hereto or shall impose any other
    condition or requirement, which condition or requirement Cupertino in its
    reasonable judgment shall deem to be materially burdensome (in which case
    Cupertino shall promptly notify Mid-Peninsula). For purposes of this
    agreement no condition or requirement shall be deemed to be "materially
    burdensome" if such condition or requirement does not materially differ from
    conditions or requirements regularly imposed in orders approving
    transactions of the type contemplated by this Agreement and compliance with
    such condition or requirement would not:
 
           (i) require the taking of any action materially inconsistent with the
       manner in which Cupertino or Mid-Peninsula has conducted its business
       previously;
 
           (ii) have a material adverse effect upon the business, financial
       condition or results of operations of Cupertino or Mid-Peninsula; or
 
          (iii) preclude satisfaction of any of the conditions to consummation
       of the transactions contemplated by this Agreement.
 
        j.  TAX OPINION.  Bronson, Bronson & McKinnon LLP, Mid-Peninsula's
    counsel, shall have delivered to Mid-Peninsula and Cupertino a tax opinion
    subject to customary assumptions and
 
                                       33

    exceptions included in such opinions and the prior delivery of certificates
    from Cupertino and Mid-Peninsula in form and substance reasonably
    satisfactory to Mid-Peninsula's counsel, substantially to the effect that
    under federal income tax law and California income and franchise tax law:
 
           (i) The Merger will not result in any recognized gain or loss to
       Cupertino or Mid-Peninsula;
 
           (ii) Except for any cash received in lieu of any fractional share, no
       gain or loss will be recognized by holders of Cupertino Shares who
       receive Bancorp Shares in exchange for the Cupertino Shares which they
       hold;
 
          (iii) The holding period of Bancorp Shares exchanged for Cupertino
       Shares will include the holding period of the Cupertino Shares for which
       they are exchanged, assuming the Cupertino Shares are capital assets in
       the hands of the holder thereof at the Effective Date; and
 
          (iv) The basis of the Bancorp Shares received in the exchange will be
       the same as the basis of the Cupertino Shares for which they are
       exchanged, less any basis attributable to fractional shares for which
       cash is received.
 
        k.  ACCOUNTANT'S COMFORT LETTERS.  On or prior to the date of
    effectiveness of the Mid-Peninsula Registration Statement, Cupertino shall
    have received a comfort letter addressed to Cupertino from KPMG Peat Marwick
    LLP, independent public accountants for Mid-Peninsula, in form and substance
    satisfactory to Cupertino and its counsel. Cupertino shall also have
    received from KPMG Peat Marwick LLP, a comfort letter dated the Effective
    Date, in form and substance satisfactory to Cupertino and its counsel, as to
    such matters, as of a specified date not more than five (5) business days
    prior to the Effective Date, as Cupertino may reasonably request.
 
        l.  DISSENTING SHARES.  Holders of not more than nine percent (9%) of
    the outstanding Cupertino Shares and Bancorp Shares shall have perfected
    dissenter's rights pursuant to Chapter 13 of the California General
    Corporation Law.
 
        m.  UNAUDITED FINANCIALS.  Not later than five (5) business days prior
    to the Effective Date, Mid-Peninsula shall have furnished Cupertino a copy
    of its most recently prepared unaudited month-end consolidated financial
    statements, including a balance sheet and statement of income of
    Mid-Peninsula.
 
        n.  AFFILIATE AGREEMENTS.  Cupertino shall have received signed
    affiliate agreements on or before the Document Delivery Date, from each
    person who, in the opinion of Cupertino's and Mid-Peninsula's counsel, might
    be deemed to be an affiliate of Cupertino or Mid-Peninsula under Rule 144 or
    145 of the 1933 Act. The agreements will include provisions restricting
    certain actions by an affiliate related to Cupertino Shares or Mid-Peninsula
    and/or Bancorp Shares, including the sale, purchase, acquisition or transfer
    of Cupertino Shares or Mid-Peninsula and/or Bancorp Shares in a manner which
    may render pooling-of-interests accounting treatment unavailable in the
    Merger.
 
        o.  CLOSING DOCUMENTS.  Cupertino shall have received such certificates
    and other closing documents as counsel for Cupertino shall reasonably
    request.
 
        p.  CONSENTS.  Mid-Peninsula shall have received, or Cupertino shall
    have satisfied itself that Mid-Peninsula will receive, all consents of third
    parties as may be required including consents of other parties to and
    required by material mortgages, notes, leases, franchises, agreements,
    licenses and permits applicable to Mid-Peninsula and MPB, in each case in
    form and substance reasonably satisfactory to Cupertino, and no such consent
    or license or permit shall have been withdrawn or suspended.
 
                                       34

        q.  FAIRNESS OPINION.  The Board of Directors of Cupertino shall have
    received an opinion of Sutro & Co. Incorporated, dated the date of this
    Agreement and the date of mailing or a date within three (3) days prior to
    the date of mailing the Joint Proxy Statement/Prospectus, to the effect that
    the consideration to be received by Cupertino shareholders in the Merger is
    fair, from a financial point of view, to Cupertino and its shareholders, and
    such opinion shall not have been withdrawn by the Effective Time of the
    Merger.
 
        r.  ACCOUNTING TREATMENT.  Mid-Peninsula shall have received a letter
    from KPMG Peat Marwick LLP, satisfactory in form and substance to Cupertino
    and its counsel, to the effect that the Merger shall qualify for the
    pooling-of-interests method of accounting in accordance with generally
    accepted accounting principles and all applicable rules, regulations and
    policies of the Commission. There shall have been no determination by any
    court, tribunal, regulatory authority or other government agency, that the
    Merger fails or will fail to qualify for pooling-of-interests accounting
    treatment.
 
        s.  SHAREHOLDER AGREEMENTS.  Cupertino and Mid-Peninsula shall have
    received signed shareholder agreements from members of the Boards of
    Directors and the executive officers of Cupertino and Mid-Peninsula on or
    before the Document Delivery Date, pursuant to which each such person in
    their capacity as a shareholder commits to vote their Cupertino Shares or
    Mid-Peninsula Shares in favor of the Merger and the transactions
    contemplated thereby and pursuant to this Agreement and the Merger
    Agreement, and to recommend to shareholders, subject to the exercise of
    fiduciary duties, that they vote in favor of the Merger and the transactions
    contemplated thereby and pursuant to this Agreement and the Merger
    Agreement.
 
        t.  PERFORMANCE TESTS.  As of the Determination Date, Closing Date and
    the Effective Date, Mid-Peninsula and MPB on a consolidated basis shall have
    (i) total shareholders' equity and leverage, tier 1 and total risk-based
    capital ratios, respectively, in amounts required to comply with the "well
    capitalized" category of applicable FDIC regulations, (ii) total reserves
    for losses on outstanding loans to net loans equal to 1.20%, and (iii) total
    shareholders' equity of not less than Twenty-Three Million Dollars
    ($23,000,000).
 
        u.  STOCK OPTION AGREEMENT.  Cupertino shall have received a signed and
    dated stock option agreement from Mid-Peninsula on or before the Document
    Delivery Date, granting an option to Cupertino to acquire up to nineteen
    percent (19%) of the Mid-Peninsula Shares in the event of a Business
    Combination between Mid-Peninsula and any third party.
 
        v.  NASDAQ LISTING.  Mid-Peninsula shares shall have been listed with
    the Nasdaq Stock Market for trading on the Nasdaq National Market System and
    Mid-Peninsula shall have taken all necessary action to similarly list
    Bancorp Shares under a symbol mutually agreed upon by the parties to be
    effective from and after the Effective Time of the Merger.
 
        w.  DEBENTURE AGREEMENT.  The supplemental debenture agreement to be
    delivered pursuant to Section 3.1 of this Agreement shall have been signed
    and delivered to Cupertino together with an opinion of Manatt, Phelps &
    Phillips, LLP, in form and substance reasonably satisfactory to Cupertino,
    Mid-Peninsula and their respective counsel.
 
9.  CLOSING.
 
        a.  CLOSING DATE.  The closing (the "Closing") shall, unless another
    date, time or place is agreed to in writing by Mid-Peninsula and Cupertino,
    be held at the offices of Bronson, Bronson & McKinnon LLP, 10 Almaden Blvd.,
    Suite 600, San Jose, California at a time mutually agreed upon between the
    parties and as soon as practicable following the Determination Date and the
    last to occur of (i) the expiration of any waiting periods under applicable
    law or regulation, and (ii) the date on which all conditions to the
    obligation of either party to consummate the Merger have been satisfied (the
    "Closing Date").
 
                                       35

        b.  DELIVERY OF DOCUMENTS.  At the Closing, the parties shall use their
    respective best efforts to deliver or cause to be delivered the opinions,
    certificates and other documents required to be delivered by this Agreement.
 
        c.  FILINGS.  At the Closing, Mid-Peninsula and Cupertino shall instruct
    their respective representatives to make or confirm such filings as shall be
    required in the opinion of counsel to Mid-Peninsula and Cupertino to give
    effect to the Merger.
 
10. POST-CLOSING MATTERS.
 
    Bancorp will prepare and file with the Commission on the appropriate form as
soon as practicable the results of combined operations of Mid-Peninsula and
Cupertino for the first full calendar month after the Effective Date.
 
11. EXPENSES.
 
    Each party hereto agrees to comply with generally accepted accounting
principles, without right of reimbursement from the other party and whether or
not the transactions contemplated by this Agreement or the Merger Agreement
shall be consummated, relating to the payment of costs and expenses incurred by
such party incident to the performance of its obligations under this Agreement
and the Merger Agreement, including without limitation, costs incident to the
preparation of the Merger Agreement, this Agreement, the Mid-Peninsula
Registration Statement and Joint Proxy Statement/Prospectus (including the
audited financial statements of the parties contained therein) and incident to
the consummation of the Merger and of the other transactions contemplated herein
and in the Merger Agreement, including the fees and disbursements of counsel,
accountants, consultants and financial advisers employed by such party in
connection therewith. Notwithstanding the foregoing, each party shall pay
one-half of (i) the printing costs of the Registration Statement and the Joint
Proxy Statement/Prospectus, (ii) all fees and costs payable pursuant to state
"blue-sky" securities laws, (iii) fees and costs related to obtaining a tax
opinion, (iv) fees and costs related to obtaining a letter from KPMG Peat
Marwick LLP regarding pooling-of-interests accounting treatment, (v) the fee
required to be paid to the Commission to register the Bancorp Shares, (vi) the
fees and costs related to any amendments to the Mid-Peninsula Stock Option Plan
or for the preparation of a new Mid-Peninsula Stock Option Plan including the
cost of obtaining any permits or approvals of government agencies and regulatory
authorities and applicable filing fees, (vii) the fees related to preparation
and filing of applications with government agencies or regulatory authorities
for approval of the transactions contemplated by the Merger, this Agreement and
the Merger Agreement, and (viii) the fees and costs related to the listing of
the Mid-Peninsula Shares and Bancorp Shares with the Nasdaq Stock Market for
trading on the Nasdaq National Market System. Each party shall bear the costs of
distributing the Joint Proxy Statement/Prospectus and other information relating
to these transactions to its shareholders and of conducting a meeting of its
shareholders.
 
12. AMENDMENT; TERMINATION.
 
        a.  AMENDMENT.  This Agreement and the Merger Agreement may be amended
    by Mid-Peninsula and Cupertino at any time prior to the Effective Time of
    the Merger without the approval of the shareholders of Mid-Peninsula and
    shareholders of Cupertino with respect to any of their terms except the
    terms relating to the Conversion Ratio or the form or amount of
    consideration to be delivered to the Cupertino shareholders in the Merger or
    otherwise as required by applicable law.
 
        b.  TERMINATION.  This Agreement and the Merger Agreement may be
    terminated as follows:
 
           (i) By the mutual consent of the Boards of Directors of both
       Mid-Peninsula and Cupertino at any time prior to the Effective Time of
       the Merger.
 
                                       36

           (ii) By the Boards of Directors of Mid-Peninsula or Cupertino upon
       the failure of the shareholders of Mid-Peninsula or Cupertino to give the
       requisite approval of this Agreement and the transactions contemplated
       hereby including the amendments to the Mid-Peninsula Articles of
       Incorporation, Bylaws and 1994 Stock Option Plan.
 
          (iii) By the Boards of Directors of Mid-Peninsula or Cupertino upon
       the expiration of thirty (30) days after any government agency or
       regulatory authority denies or refuses to grant any approval, consent or
       qualification required to be obtained in order to consummate the
       transactions contemplated by this Agreement unless, within said thirty
       (30) day period after such denial or refusal, Mid-Peninsula and Cupertino
       agree to submit the application to the government agency or regulatory
       authority that has denied or refused to grant the approval, consent or
       qualification requested.
 
          (iv) By the Board of Directors of Mid-Peninsula on or after the
       Termination Date, if any of the conditions in Section 7 to which the
       obligations of Mid-Peninsula are subject have not been fulfilled.
 
           (v) By the Board of Directors of Mid-Peninsula if a materially
       adverse change shall have occurred since March 31, 1996, in the business,
       financial condition, results of operations or assets of Cupertino or CNB.
 
          (vi) By the Board of Directors of Mid-Peninsula or Cupertino in the
       event that Cupertino, CNB or their affiliates enter into a Business
       Combination; provided, that termination based thereon shall not terminate
       the Stock Option Agreement signed by Cupertino in accordance with this
       Agreement.
 
          (vii) By the Board of Directors of Mid-Peninsula upon the expiration
       of twenty (20) days from delivery of written notice by Mid-Peninsula to
       Cupertino of Cupertino's breach of or failure to satisfy any covenant or
       agreement contained in this Agreement resulting in a material impairment
       of the benefit reasonably expected to be derived by Mid-Peninsula from
       the performance or satisfaction of such covenant or agreement (provided
       that such breach has not been waived by Mid-Peninsula or cured by
       Cupertino prior to expiration of such twenty (20) day period).
 
         (viii) By the Board of Directors of Cupertino on or after the
       Termination Date, if any of the conditions contained in Section 8 to
       which the obligations of Cupertino are subject have not been fulfilled.
 
          (ix) By the Board of Directors of Cupertino if a materially adverse
       change shall have occurred since March 31, 1996 in the business,
       financial condition, results of operations or assets of Mid-Peninsula or
       MPB.
 
           (x) By the Board of Directors of Cupertino and Mid-Peninsula in the
       event Mid-Peninsula, MPB or their affiliates enter into a Business
       Combination; provided, that termination based thereon shall not terminate
       the Stock Option Agreement signed by Mid-Peninsula in accordance with
       this Agreement.
 
          (xi) By the Board of Directors of Cupertino upon the expiration of
       twenty (20) days from delivery of written notice by Cupertino to
       Mid-Peninsula of Mid-Peninsula's breach of or failure to satisfy any
       covenant or agreement contained in this Agreement resulting in a material
       impairment of the benefit reasonably expected to be derived by Cupertino
       from the performance or satisfaction of such covenant or agreement
       (provided that such breach has not been waived by Cupertino or cured by
       Mid-Peninsula prior to expiration of such twenty (20) day period).
 
          (xii) By the Board of Directors of Mid-Peninsula in the event that
       Cupertino shall fail to deliver or cause to be delivered to Mid-Peninsula
       on or before the date which is twenty-seven (27) days after the date of
       this Agreement (the "Document Delivery Date") (i) the Schedules
 
                                       37

       to be delivered pursuant to Section 4 hereof, in form and substance
       satisfactory to Mid-Peninsula and its counsel; (ii) the following signed
       documents, in form and substance reasonably acceptable to Mid-Peninsula
       and its counsel: (a) the affiliate agreement to be delivered pursuant to
       Section 7(n) hereof; (b) the shareholder agreements to be delivered
       pursuant to Section 7(s) hereof; and (d) the stock option agreement to be
       delivered pursuant to Section 7(u) hereof; and (iii) the form of the
       following documents, in form and substance reasonably acceptable to
       Mid-Peninsula and its counsel: (a) the officers certificate to be
       delivered pursuant to Section 7(e) hereof; (b) the opinion of counsel to
       Cupertino to be delivered pursuant to Section 7(f) hereof; and (c) the
       legal opinion in connection with the supplemental debenture agreement to
       be delivered pursuant to Section 7(x) hereof.
 
         (xiii) By the Board of Directors of Cupertino in the event that
       Mid-Peninsula shall fail to deliver or cause to be delivered to Cupertino
       on or before the Document Delivery Date (i) the Schedules to be delivered
       pursuant to Section 5 hereof, in form and substance satisfactory to
       Cupertino and its counsel; (ii) the following signed documents, in form
       and substance reasonably acceptable to Cupertino and its counsel: (a) the
       affiliate agreement to be delivered pursuant to Section 8(n) hereof; (b)
       the shareholder agreements to be delivered pursuant to Section 8(s)
       hereof; and (d) the stock option agreement to be delivered pursuant to
       Section 8(u) hereof; and (iii) the form of the following documents, in
       form and substance reasonably acceptable to Cupertino and its counsel:
       (a) the officers certificate to be delivered pursuant to Section 8(e)
       hereof; (b) the opinion of counsel to Mid-Peninsula to be delivered
       pursuant to Section 8(f) hereof; and (c) the supplemental debenture
       agreement to be delivered pursuant to Section 8(x) hereof.
 
        c.  TERMINATION DATE.  This Agreement shall be terminated if the Closing
    shall not have occurred on or before December 31, 1996; provided, however,
    that if the only conditions to the Closing which remain unsatisfied at
    December 31, 1996 are the receipt of the Government Approvals or the
    expiration of any waiting periods under applicable law or regulation, the
    Closing Date shall be automatically extended to February 28, 1997, or such
    other date as the parties may mutually agree upon (the "Termination Date"),
    for the purpose of obtaining such Government Approvals or the expiration of
    such waiting periods.
 
        d.  NOTICE.  The power of termination hereunder may be exercised by
    Mid-Peninsula or Cupertino, as the case may be, only by giving written
    notice, signed on behalf of such party by its Chairman of the Board or
    President, to the other party.
 
        e.  EFFECT OF TERMINATION; LIQUIDATED DAMAGES.
 
           (i) If this Agreement is terminated for any reason, the Merger
       Agreement shall automatically terminate. Termination of this Agreement
       shall not terminate or affect the obligations of the parties to pay
       expenses as provided in Section 11, to maintain the confidentiality of
       the other party's information obtained pursuant to this Agreement, or the
       provisions of this Section 12(e) or applicable provisions of Section 14.
 
           (ii) If Mid-Peninsula or Cupertino terminates this Agreement pursuant
       to Section 12(b)(vi), Cupertino shall pay to Mid-Peninsula, on demand,
       the sum of Seven Hundred Fifty Thousand Dollars ($750,000). If Cupertino
       or Mid-Peninsula terminates this Agreement pursuant to Section 12(b)(x)
       Mid-Peninsula shall pay to Cupertino, on demand, the sum of Seven Hundred
       Fifty Thousand Dollars ($750,000). In each case, the amount indicated
       shall be deemed liquidated damages for expenses incurred and the lost
       opportunity cost for time devoted to the transactions contemplated by
       this Agreement.
 
13. INDEMNIFICATION.
 
        a.  BY MID-PENINSULA.  Mid-Peninsula agrees to defend, indemnify and
    hold harmless Cupertino and CNB, their respective officers and directors,
    attorneys, accountants, and each person who controls Cupertino and CNB
    within the meaning of the 1933 Act from and against
 
                                       38

    any costs, damages, liabilities and expenses of any nature, insofar as such
    costs, damages, liabilities and expenses arise out of or are based upon any
    untrue statement or alleged untrue statement of any material fact contained
    in the Mid-Peninsula Registration Statement and Joint Proxy
    Statement/Prospectus or any amendments or supplements thereto, or arise out
    of or are based upon the omission or alleged omission to state therein a
    material fact required to be stated therein or necessary to make the
    statements therein not misleading; provided, however, that Mid-Peninsula
    shall be liable in any such case only to the extent that any such cost,
    damage, liability or expense arises out of or is based upon any untrue
    statement or alleged untrue statement or omission or alleged omission made
    in said Registration Statement and Joint Proxy Statement/ Prospectus or
    amendments or supplements thereto, in reliance upon and in conformity with
    information provided by and with respect to Mid-Peninsula used in preparing
    the Registration Statement. If and to the extent such agreement to indemnify
    may be unenforceable for any reason, Mid-Peninsula shall make the maximum
    contribution to the payment and satisfaction of each of the indemnified
    liabilities which may be permitted under applicable law.
 
        b.  BY CUPERTINO.  Cupertino agrees to defend, indemnify and hold
    harmless Mid-Peninsula and MPB, their respective officers and directors,
    attorneys, accountants, and each person who controls Mid-Peninsula and MPB
    within the meaning of the 1933 Act from and against any costs, damages,
    liabilities and expenses of any nature, insofar as such costs, damages,
    liabilities and expenses arise out of or are based upon any untrue statement
    or alleged untrue statement of any material fact contained in the
    Mid-Peninsula Registration Statement and Joint Proxy Statement/ Prospectus
    or any amendments or supplements thereto, or arise out of or are based upon
    the omission or alleged omission to state therein a material fact required
    to be stated therein or necessary to make the statements therein not
    misleading; provided, however, that Cupertino shall be liable in any such
    case only to the extent that any such cost, damage, liability or expense
    arises out of or is based upon any untrue statement or alleged untrue
    statement or omission or alleged omission made in said Registration
    Statement and Joint Proxy Statement/Prospectus or amendments or supplements
    thereto, in reliance upon and in conformity with information provided by and
    with respect to Cupertino used in preparing the Registration Statement and
    Joint Proxy Statement/Prospectus. If and to the extent such agreement to
    indemnify may be unenforceable for any reason, Cupertino shall make the
    maximum contribution to the payment and satisfaction of each of the
    indemnified liabilities which may be permitted under applicable law.
 
        c.  NOTIFICATION.  Promptly after receipt by any party to be indemnified
    pursuant to this subarticle (the "Indemnified Party") of notice of (i) any
    claim or (ii) the commencement of any action or proceeding, the Indemnified
    Party will give the other party (the "Indemnifying Party") written notice of
    such claim or the commencement of such action or proceeding. The
    Indemnifying Party shall have the right, at its option, to compromise or
    defend, by its own counsel, any such matter involving the Indemnified
    Party's asserted liability. In the event that the Indemnifying Party shall
    undertake to compromise or defend any such asserted liability, it shall
    promptly notify the Indemnified Party of its intention to do so, and the
    Indemnified Party agrees to cooperate fully with the Indemnifying Party and
    its counsel in the compromise of, or defense against, any such asserted
    liability. In any event, the Indemnifying Party shall have the right to
    participate in the defense of such asserted liability.
 
                                       39

14. MISCELLANEOUS.
 
        a.  NOTICES.  Any notice or other communication required or permitted
    under this Agreement shall be effective only if it is in writing and
    delivered personally, or by Federal Express or similar overnight courier, or
    by facsimile or sent by first class United States mail, postage prepaid,
    registered or certified mail, addressed as follows:
 

                                         
To Mid-Peninsula:                           To Cupertino:
 
David L. Kalkbrenner                        C. Donald Allen
President                                   President
Mid-Peninsula Bancorp                       Cupertino National Bancorp
420 Cowper Street                           20230 Stevens Creek Blvd.
Palo Alto, CA 94301-1504                    Cupertino, California 95014
Telephone: (415) 323-5150                   Telephone: (408) 996-1144
Telecopier: (415) 323-7421                  Telecopier: (408) 996-0657
 
With a copy to:                             With a copy to:
 
Bronson, Bronson & McKinnon LLP             Manatt, Phelps & Phillips, LLP
10 Almaden Blvd., Suite 600                 11355 W. Olympic Blvd.
San Jose, California 95113                  Los Angeles, California 90064
Attn: Glenn T. Dodd                         Attn: Paul H. Irving
Telephone: (408) 293-0599                        William T. Quicksilver
Telecopier: (408) 999-6553                  Telephone: (310) 312-4000
Attn: John W. Carr                          Telecopier: (310) 312-4224
Telephone: (415) 986-4200
Telecopier: (415) 982-1394

 
    or to such other address as either party may designate by notice to the
    other, and shall be deemed to have been given upon receipt.
 
        b.  KNOWLEDGE.  Whenever the term "knowledge" or "to the best of
    knowledge" or words of similar import are used in this Agreement in
    connection with a party's representations and warranties, it shall mean the
    actual knowledge of a party after due inquiry of a party's directors,
    executive officers, senior vice presidents, and any officer(s) in charge of
    or having responsibility for any department or division of a party or its
    subsidiaries, including, without limitation, operations, credit, trust, SBA,
    mortgage, real estate, finance, administration, compliance and audit.
 
        c.  BINDING AGREEMENT.  This Agreement is binding upon and is for the
    benefit of Mid-Peninsula and Cupertino and their respective successors and
    permitted assigns. This Agreement is not made for the benefit of any person,
    firm, corporation or association not a party hereto, and no other person,
    firm, corporation or association shall acquire or have any right under or by
    virtue of this Agreement. No party may assign this Agreement or any of its
    rights, privileges, duties or obligations hereunder without the prior
    written consent of the other party to this Agreement.
 
        d.  SURVIVAL OF REPRESENTATIONS AND WARRANTIES.  No investigation by
    Mid-Peninsula or Cupertino made before or after the date of this Agreement
    shall affect the representations and warranties which are contained in this
    Agreement and such representations and warranties shall survive such
    investigation, provided that, except with respect to covenants and
    agreements to be performed in whole or in part subsequent to the Effective
    Time of the Merger (as to which the related representations and warranties
    shall survive until their performance) which covenants and agreements shall
    survive the Effective Time of the Merger, the representations, warranties,
    covenants and agreements of Mid-Peninsula and Cupertino contained in this
    Agreement shall terminate upon the Effective Time of the Merger.
 
                                       40

        e.  GOVERNING LAW.  This Agreement shall be governed by and construed in
    accordance with the laws of the State of California.
 
        f.  ATTORNEYS' FEES.  In any action at law or suit in equity in relation
    to this Agreement, the prevailing party in such action or suit shall be
    entitled to receive a reasonable sum for its attorneys' fees and all other
    reasonable costs and expenses incurred in such action or suit.
 
        g.  ENTIRE AGREEMENT; SEVERABILITY.  This Agreement and the documents,
    certificates, agreements, letters, schedules and exhibits attached or
    required to be delivered pursuant hereto set forth the entire agreement and
    understandings of the parties in respect of the transactions contemplated
    hereby, and supersede all prior agreements, arrangements and understanding
    relating to the subject matter hereof, excluding that certain
    Confidentiality Agreement between the parties dated May 8, 1996. Each
    provision of this Agreement shall be interpreted in a manner to be effective
    and valid under applicable law, but if any provision hereof shall be
    prohibited or ruled invalid under applicable law, the validity, legality and
    enforceability of the remaining provisions shall not, except as otherwise
    required by law, be affected or impaired as a result of such prohibition or
    ruling.
 
        h.  COUNTERPARTS.  This Agreement may be executed in several
    counterparts, each of which shall be deemed an original, but all of which
    together shall constitute one and the same instrument.
 
        i.  EFFECT OF RESTATEMENT.  The restatement of this Agreement shall not
    constitute a waiver of, or otherwise affect, the rights, obligations or
    liabilities of the parties hereto as in effect immediately prior to the
    restatement of this Agreement (except to the extent that the terms of this
    Agreement have been expressly amended from the terms of this Agreement in
    effect immediately prior to the date of the restatement of this Agreement).
    Except as expressly stated to the contrary herein, all references herein,
    and in any documents or agreements executed pursuant hereto, to "the date of
    this Agreement," "the date hereof" or similar phrases with reference to this
    Agreement shall be deemed to refer to June 5, 1996, and any representations
    or warranties made or deemed to be made as of that date shall not be deemed
    to be made again at the time of restatement of this Agreement.
 
                                       41

    IN WITNESS WHEREOF, Mid-Peninsula and Cupertino have each caused this Second
Amended and Restated Agreement and Plan of Reorganization and Merger to be
signed by its Chairman of the Board and President as of the day and year first
above written.
 
 MID-PENINSULA BANCORP                   CUPERTINO NATIONAL BANCORP
 
 By:                                     By:         /s/ JOHN M. GATTO
     ----------------------------------      ----------------------------------
     Duncan L. Matteson                                John M. Gatto
     CHAIRMAN OF THE BOARD                         CHAIRMAN OF THE BOARD
 
 By:      /s/ DAVID L. KALKBRENNER       By:        /s/ C. DONALD ALLEN
     ----------------------------------      ----------------------------------
            David L. Kalkbrenner                      C. Donald Allen
                 PRESIDENT                               PRESIDENT
 
                                       42