1
                                                                   EXHIBIT 4.2

                              MICROSOFT CORPORATION

                                       TO

                                  [To be named]

                                     Trustee

                             -----------------------

                                    Indenture

                             Dated as of ...........

                             -----------------------

                                  $............



                   __% Convertible Subordinated Notes Due 1999

   2
                              MICROSOFT CORPORATION

                 Certain Sections of this Indenture relating to
                         Sections 310 through 318 of the
                          Trust Indenture Act of 1939:

Trust Indenture                                             Indenture
  Act Section                                                Section
- ---------------                                             ---------
   310(a)(1)   ........................................     609
      (a)(2)   ........................................     609
      (a)(3)   ........................................     Not
                                                            Applicable
      (a)(4)   ........................................     Not
                                                            Applicable
      (b)      ........................................     608
                                                            610
   311(a)      ........................................     613
      (b)      ........................................     613
   312(a)      ........................................     701
                                                            702(a)
      (b)      ........................................     702(b)
      (c)      ........................................     702(c)
   313(a)      ........................................     703(a)
      (a)(4)   ........................................     101
                                                            1004
      (b)      ........................................     703(a)
      (c)      ........................................     703(a)
      (d)      ........................................     703(b)
   314(a)      ........................................     704
      (b)      ........................................     Not
                                                            Applicable
      (c)(1)   ........................................     102
      (c)(2)   ........................................     102
      (c)(3)   ........................................     Not
                                                            Applicable
      (d)      ........................................     Not
                                                            Applicable
      (e)      ........................................     102
   315(a)      ........................................     601
      (b)      ........................................     602
      (c)      ........................................     601
      (d)      ........................................     601
      (e)      ........................................     514
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Trust Indenture                                             Indenture
  Act Section                                                Section
- ---------------                                             ---------
   316(a)      ........................................     101
      (a)(1)(A)........................................     502
                                                            512
      (a)(1)(B)........................................     513
      (a)(2)   ........................................     Not
                                                            Applicable
      (b)      ........................................     508
      (c)      ........................................     104(c)
   317(a)(1)   ........................................     503
      (a)(2)   ........................................     504
      (b)      ........................................     1003
   318(a)      ........................................     107

- --------------

      Note: This reconciliation and tie shall not, for any purpose, be deemed to
be a part of the Indenture.


                                      -ii-
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                                TABLE OF CONTENTS

                                                                            Page
                                                                            ----
Parties ...................................................................    1
Recitals of the Company ...................................................    1

                                   ARTICLE ONE

                        Definitions and Other Provisions
                             of General Application

SECTION 101. Definitions .................................................     1
             Act .........................................................     2
             Affiliate ...................................................     2
             Agent Member ................................................     2
             Authenticating Agent ........................................     2
             Board of Directors ..........................................     2
             Board Resolution ............................................     2
             Business Day ................................................     3
             Closing Price ...............................................     3
             Commission ..................................................     3
             Common Shares ...............................................     3
             Company .....................................................     4
             Company Request or Company Order ............................     4
             Conversion Amount ...........................................     4
             Conversion Date .............................................     4
             Conversion Election .........................................     4
             Corporate Trust Office ......................................     4
             corporation .................................................     4
             Current Market Price ........................................     4
             Defaulted Interest ..........................................     4
             Depositary ..................................................     4
             Event of Default ............................................     5
             Global Security .............................................     5
             Holder ......................................................     5
             Indenture ...................................................     5
             Initial Price ...............................................     5
             Interest Payment Date .......................................     5
             Maturity ....................................................     5
             Officers' Certificate .......................................     5
             Opinion of Counsel ..........................................     5
             Outstanding .................................................     6
             Paying Agent ................................................     6
             Person ......................................................     7
             Predecessor Security ........................................     7
             Regular Record Date .........................................     7


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                                                                            Page
                                                                            ----
             Security Register and Security
             Registrar ...................................................     7
             Senior Indebtedness .........................................     7
             Series A Preferred Shares ...................................     7
             Special Record Date .........................................     7
             Stated Maturity .............................................     7
             Subsidiary ..................................................     8
             Trading Day .................................................     8
             Trustee .....................................................     8
             Trust Indenture Act .........................................     8
             Vice President ..............................................     8

SECTION 102. Compliance Certificates and Opinions ........................     8

SECTION 103. Form of Documents Delivered to Trustee ......................     9

SECTION 104. Acts of Holders; Record Dates ...............................    10

SECTION 105. Notices, Etc., to Trustee and Company .......................    11

SECTION 106. Notice to Holders; Waiver ...................................    12

SECTION 107. Conflict with Trust Indenture Act ...........................    12

SECTION 108. Effect of Headings and Table of Contents ....................    13

SECTION 109. Successors and Assigns ......................................    13

SECTION 110. Separability Clause .........................................    13

SECTION 111. Benefits of Indenture .......................................    13

SECTION 112. Governing Law ...............................................    13

SECTION 113. Legal Holidays ..............................................    13


                                   ARTICLE TWO

                                 Security Forms

SECTION 201. Forms Generally .............................................    14

SECTION 202. Form of Face of Security ....................................    14

SECTION 203. Form of Reverse of Security .................................    19


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                                                                            Page
                                                                            ----
SECTION 204. Form of Trustee's Certificate of
             Authentication ..............................................    21

                                  ARTICLE THREE

                                 The Securities

SECTION 301. Title and Terms .............................................    21

SECTION 302. Denominations ...............................................    22

SECTION 303. Execution, Authentication, Delivery
             and Dating ..................................................    22

SECTION 304. Temporary Securities ........................................    23

SECTION 305. Registration, Registration of Transfer
             and Exchange ................................................    24

SECTION 306. Mutilated, Destroyed, Lost and Stolen
             Securities ..................................................    27

SECTION 307. Payment of Interest; Interest Rights
             Preserved ...................................................    28

SECTION 308. Persons Deemed Owners .......................................    29

SECTION 309. Cancellation ................................................    29

SECTION 310. Computation of Interest .....................................    30

SECTION 311. Listing of Securities .......................................    30


                                  ARTICLE FOUR

                           Satisfaction and Discharge

SECTION 401 Satisfaction and Discharge of Indenture ......................    30

SECTION 402 Application of Trust Money ...................................    31

                                  ARTICLE FIVE

                                    Remedies

SECTION 501. Events of Default ...........................................    32


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                                                                            Page
                                                                            ----
SECTION 502. Acceleration of Maturity;
             Rescission and Annulment ....................................    34

SECTION 503. Collection of Indebtedness and Suits
             for Enforcement by Trustee ..................................    35

SECTION 504. Trustee May File Proofs of Claim ............................    36

SECTION 505. Trustee May Enforce Claims
             Without Possession of Securities ............................    36

SECTION 506. Application of Money Collected ..............................    37

SECTION 507. Limitation on Suits .........................................    37

SECTION 508. Unconditional Right of Holders to
             Receive Principal and Interest and
             to Convert ..................................................    38

SECTION 509. Restoration of Rights and Remedies ..........................    38

SECTION 510. Rights and Remedies Cumulative ..............................    39

SECTION 511. Delay or Omission Not Waiver ................................    39

SECTION 512. Control by Holders ..........................................    39

SECTION 513. Waiver of Past Defaults .....................................    39

SECTION 514. Undertaking for Costs .......................................    40

SECTION 515. Waiver of Stay or Extension Laws ............................    40

                                   ARTICLE SIX

                                   The Trustee

SECTION 601. Certain Duties and Responsibilities .........................    41

SECTION 602. Notice of Defaults ..........................................    41

SECTION 603. Certain Rights of Trustee ...................................    41

SECTION 604. Not Responsible for Recitals
             or Issuance of Securities ...................................    43

SECTION 605. May Hold Securities .........................................    43


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                                                                            Page
                                                                            ----
SECTION 606. Money Held in Trust .........................................    43

SECTION 607. Compensation and Reimbursement ..............................    43

SECTION 608. Disqualification; Conflicting Interests .....................    44

SECTION 609. Corporate Trustee Required; Eligibility .....................    45

SECTION 610. Resignation and Removal;
             Appointment of Successor ....................................    45

SECTION 611. Acceptance of Appointment by Successor ......................    47

SECTION 612. Merger, Conversion, Consolidation or
             Succession to Business ......................................    47

SECTION 613. Preferential Collection of
             Claims Against Company ......................................    48

SECTION 614. Appointment of Authenticating Agent .........................    48

                                  ARTICLE SEVEN

                Holders' Lists and Reports by Trustee and Company

SECTION 701. Company to Furnish Trustee Names
             and Addresses of Holders ....................................    50

SECTION 702. Preservation of Information;
             Communications to Holders ...................................    50

SECTION 703. Reports by Trustee ..........................................    51

SECTION 704. Reports by Company ..........................................    51

                                  ARTICLE EIGHT

              Consolidation, Merger, Conveyance, Transfer or Lease

SECTION 801. Company May Consolidate, Etc.,
             Only on Certain Terms .......................................    52

SECTION 802. Successor Substituted .......................................    53

                                  ARTICLE NINE


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                             Supplemental Indentures
                                                                           Page
                                                                           ----
SECTION 901. Supplemental Indentures
             Without Consent of Holders ..................................    53

SECTION 902. Supplemental Indentures with
             Consent of Holders ..........................................    54

SECTION 903. Execution of Supplemental Indentures ........................    55

SECTION 904. Effect of Supplemental Indentures ...........................    55

SECTION 905. Conformity with Trust Indenture Act .........................    55

SECTION 906. Reference in Securities to
             Supplemental Indentures .....................................    56

                                   ARTICLE TEN

                                    Covenants

SECTION 1001. Payment of Principal and Interest ..........................    56

SECTION 1002. Maintenance of Office or Agency ............................    56

SECTION 1003. Money for Security Payments to
              Be Held in Trust ...........................................    57

SECTION 1004. Statement by Officers as to Default ........................    58

SECTION 1005. Existence ..................................................    59

                                 ARTICLE ELEVEN

                           Subordination of Securities

SECTION 1101. Securities Subordinate to Senior
              Indebtedness ...............................................    59

SECTION 1102. Payment Over of Proceeds Upon
              Dissolution, Etc ...........................................    59

SECTION 1103. Prior Payment to Senior Indebtedness Upon
              Acceleration of Securities .................................    61


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                                                                            Page
                                                                            ----
SECTION 1104. No Payment When Senior Indebtedness in
              Default ....................................................    61

SECTION 1105. Payment Permitted If No Default ............................    62

SECTION 1106. Subrogation to Rights of Holders of Senior
              Indebtedness ...............................................    63

SECTION 1107. Provisions Solely to Define Relative
              Rights .....................................................    63

SECTION 1108. Trustee to Effectuate Subordination ........................    64

SECTION 1109. No Waiver of Subordination Provisions ......................    64

SECTION 1110. Notice to Trustee ..........................................    65

SECTION 1111. Reliance on Judicial Order or Certificate
              of Liquidating Agent .......................................    66

SECTION 1112. Trustee Not Fiduciary for Holders of
              Senior Indebtedness ........................................    66

SECTION 1113. Rights of Trustee as Holder of Senior
              Indebtedness; Preservation of Trustee's
              Rights .....................................................    66

SECTION 1114. Article Applicable to Paying Agents ........................    67

                                 ARTICLE TWELVE

                            Conversion of Securities

SECTION 1201. Terms of Conversion and Settlement .........................    67

SECTION 1202. Merger Adjustments .........................................    69


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            INDENTURE, dated as of __________________, between MICROSOFT
CORPORATION, a corporation duly organized and existing under the laws of the
State of Washington (herein called the "Company"), having its principal office
at One Microsoft Way, Redmond, Washington 98052-6399, and CITIBANK, N.A., 
a ___________________________ duly organized and existing under the laws of 
__________________________, as Trustee (herein called the "Trustee").
    

                             RECITALS OF THE COMPANY

            The Company has duly authorized the creation of an issue of its
____% Convertible Subordinated Notes due 1999 (herein called the "Securities")
of substantially the tenor and amount hereinafter set forth, and to provide
therefor, the Company has duly authorized the execution and delivery of this
Indenture.

            All things necessary to make the Securities, when executed by the
Company and authenticated and delivered hereunder and duly issued by the
Company, the valid obligations of the Company, and to make this Indenture a
valid agreement of the Company, in accordance with their and its terms, have
been done.

            NOW, THEREFORE, THIS INDENTURE WITNESSETH:

            For and in consideration of the premises and the purchase of the
Securities by the Holders thereof, it is mutually agreed, for the equal and
proportionate benefit of all Holders of the Securities, as follows:

                                   ARTICLE ONE

                        Definitions and Other Provisions
                             of General Application

SECTION 101.      Definitions.

            For all purposes of this Indenture, except as otherwise expressly
provided or unless the context otherwise requires:

            (1) the terms defined in this Article have the meanings assigned to
      them in this Article and include the plural as well as the singular;
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            (2) all other terms used herein which are defined in the Trust
      Indenture Act, either directly or by reference therein, have the meanings
      assigned to them therein;

            (3) all accounting terms not otherwise defined herein have the
      meanings assigned to them in accordance with generally accepted accounting
      principles, and, except as otherwise herein expressly provided, the term
      "generally accepted accounting principles" with respect to any computation
      required or permitted hereunder shall mean such accounting principles as
      are generally accepted--at the date of this instrument--at the date of
      such computation; and

            (4) the words "herein", "hereof" and "hereunder" and other words of
      similar import refer to this Indenture as a whole and not to any
      particular Article, Section or other subdivision.

            "Act," when used with respect to any Holder, has the meaning
specified in Section 104.

            "Affiliate" of any specified Person means any other Person directly
or indirectly controlling or controlled by or under direct or indirect common
control with such specified Person. For the purposes of this definition,
"control" when used with respect to any specified Person means the power to
direct the management and policies of such Person, directly or indirectly,
whether through the ownership of voting securities, by contract or otherwise;
and the terms "controlling" and "controlled" have meanings correlative to the
foregoing.

            "Agent Member" means any member of, or participant in, the
Depositary.

            "Authenticating Agent" means any Person authorized by the Trustee
pursuant to Section 614 to act on behalf of the Trustee to authenticate
Securities.

            "Board of Directors" means either the board of directors of the
Company or any duly authorized committee of that board.

            "Board Resolution" means a copy of a resolution certified by the
Secretary or an Assistant Secretary of the Company to have been duly adopted by
the Board of Directors


                                      -2-
   13
and to be in full force and effect on the date of such certification, and
delivered to the Trustee.

            "Business Day" means each Monday, Tuesday, Wednesday, Thursday and
Friday which is not a day on which banking institutions in the Borough of
Manhattan, the City of New York, New York are authorized or obligated by law or
executive order to close.

            "Closing Price" of a share of Common Shares on any date of
determination means the closing sale price (or, if no closing price is reported,
the last reported sale price) of such share as reported by the Nasdaq National
Market on such date, or, if it is not so reported, as reported in the composite
transactions for the principal United States securities exchange on which the
Common Share is so listed, or, if it is not so listed on a United States
national or regional securities exchange, the last quoted bid price of the
Common Shares in the over-the-counter market as reported by the National
Quotation Bureau or similar organization, or, if such bid price is not
available, the market value of a Common Share on such date as determined by a
nationally recognized independent investment banking firm retained for this
purpose by the Company.

            "Commission" means the Securities and Exchange Commission, as from
time to time constituted, created under the Securities Exchange Act of 1934, or,
if at any time after the execution of this instrument such Commission is not
existing and performing the duties now assigned to it under the Trust Indenture
Act, then the body performing such duties at such time.

            "Common Shares" includes any shares of any class of the Company
which has no preference in respect of dividends or of amounts payable in the
event of any voluntary or involuntary liquidation, dissolution or winding-up of
the Company and which is not subject to redemption by the Company. However,
subject to the provisions of Section 1201, shares issuable on conversion of
Securities shall include only shares of the class designated as Common Shares of
the Company at [the date of this instrument] or shares of any class or classes
resulting from any reclassification or reclassifications thereof and which have
no preference in respect of dividends or of amounts payable in the event of any
voluntary or involuntary liquidation, dissolution or winding-up of the Company
and which are not subject to redemption by the Company; provided that if at any
time there shall be more than one such resulting class, the shares of each such
class then so


                                      -3-
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issuable shall be substantially in the proportion which the total number of
shares of such class resulting from all such reclassifications bears to the
total number of shares of all such classes resulting from all such
reclassifications.

            "Company" means the Person named as the "Company" in the first
paragraph of this instrument until a successor Person shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Company" shall mean such successor Person.

            "Company Request" or "Company Order" means a written request or
order signed in the name of the Company by its Chairman of the Board, its Vice
Chairman of the Board, its President or a Vice President, and by its Treasurer,
an Assistant Treasurer, its Secretary or an Assistant Secretary, and delivered
to the Trustee.

            "Conversion Amount" has the meaning specified in Section 1201.

            "Conversion Date" has the meaning specified in Section 1201.

            "Conversion Election" has the meaning specified in Section 1201.

            "Corporate Trust Office" means the principal office of the Trustee
in ______________ at which at any particular time its corporate trust business
shall be administered.

            "corporation" means a corporation, association, company, joint-stock
company or business trust.

            "Current Market Price" means the average Closing Price per share of
the Common Shares of the Company on the 20 Trading Days beginning on the
twenty-second Trading Day immediately prior to, but not including, the
Conversion Date and ending on the second Trading Day immediately prior to, but
not including, the Conversion Date.

            "Defaulted Interest" has the meaning specified in Section 307.

            "Depositary" means, with respect to the Securities issuable or
issued in whole or in part in the form of one or more Global Securities, The
Depository Trust Company for so long as it shall be a clearing agency registered
under the Securities Exchange Act of 1934, or such successor as the


                                      -4-
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Company shall designate from time to time in an Officers' Certificate delivered
to the Trustee.

                  "Event of Default" has the meaning specified in Section 501.

                  "Global Security" means a global certificate that evidences
all or part of the Securities and bears the legend set forth in Section 202.

                  "Holder" means a Person in whose name a Security is registered
in the Security Register or a Person who is the beneficial owner of a beneficial
interest in a Global Security.

                  "Indenture" means this instrument as originally executed or as
it may from time to time be supplemented or amended by one or more indentures
supplemental hereto entered into pursuant to the applicable provisions hereof,
including, for all purposes of this instrument and any such supplemental
indenture, the provisions of the Trust Indenture Act that are deemed to be a
part of and govern this instrument and any such supplemental indenture,
respectively.

                  "Initial Price" means $_______ per Common Share of the
Company.

                  "Interest Payment Date" means the Stated Maturity of an
instalment of interest on the Securities.

                  "Maturity," when used with respect to any Security, means the
date on which the principal of such Security becomes due and payable as therein
or herein provided, whether at the Stated Maturity or by declaration of
acceleration, or otherwise.

                  "Officers' Certificate" means a certificate signed by the
Chairman of the Board, a Vice Chairman of the Board, the President or a Vice
President, and by the Treasurer, an Assistant Treasurer, the Secretary or an
Assistant Secretary, of the Company, and delivered to the Trustee. One of the
officers signing an Officers' Certificate given pursuant to Section 1004 shall
be the principal executive, financial or accounting officer of the Company.

                  "Opinion of Counsel" means a written opinion of counsel, who
may be counsel for the Company, and who shall be acceptable to the Trustee.

                                      -5-

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                  "Outstanding," when used with respect to Securities, means, as
of the date of determination, all Securities theretofore authenticated and
delivered under this Indenture, except:

                  (i) Securities theretofore cancelled by the Trustee or
         delivered to the Trustee for cancellation;

                  (ii) Securities for whose payment money in the necessary
         amount has been theretofore deposited with the Trustee or any Paying
         Agent (other than the Company) in trust or set aside and segregated in
         trust by the Company (if the Company shall act as its own Paying Agent)
         for the Holders of such Securities;

                  (iii) Securities which have been paid pursuant to Section 306
         or in exchange for or in lieu of which other Securities have been
         authenticated and delivered pursuant to this Indenture, other than any
         such Securities in respect of which there shall have been presented to
         the Trustee proof satisfactory to it that such Securities are held by a
         bona fide purchaser in whose hands such Securities are valid
         obligations of the Company;

provided, however, that in determining whether the Holders of the requisite
principal amount of the Outstanding Securities have given any request, demand,
authorization, direction, notice, consent or waiver hereunder, Securities owned
by the Company or any other obligor upon the Securities or any Affiliate of the
Company or of such other obligor shall be disregarded and deemed not to be
Outstanding, except that, in determining whether the Trustee shall be protected
in relying upon any such request, demand, authorization, direction, notice,
consent or waiver, only Securities which the Trustee knows to be so owned shall
be so disregarded. Securities so owned which have been pledged in good faith may
be regarded as Outstanding if the pledgee establishes to the satisfaction of the
Trustee the pledgee's right so to act with respect to such Securities and that
the pledgee is not the Company or any other obligor upon the Securities or any
Affiliate of the Company or of such other obligor.

                  "Paying Agent" means any Person authorized by the Company to
pay the principal of or interest on any Securities on behalf of the Company.

                                      -6-

   17
                  "Person" means any individual, corporation, partnership, joint
venture, trust, unincorporated organization or government or any agency or
political subdivision thereof.

                  "Predecessor Security" of any particular Security means every
previous Security evidencing all or a portion of the same debt as that evidenced
by such particular Security; and, for the purposes of this definition, any
Security authenticated and delivered under Section 306 in exchange for or in
lieu of a mutilated, destroyed, lost or stolen Security shall be deemed to
evidence the same debt as the mutilated, destroyed, lost or stolen Security.

                  "Regular Record Date" for the interest payable on any Interest
Payment Date means the __________ or _____________ (whether or not a Business
Day), as the case may be, next preceding such Interest Payment Date.

                  "Security Register" and "Security Registrar" have the
respective meanings specified in Section 305.

                  "Senior Indebtedness" means (a) the principal of and interest
on all indebtedness of the Company (including indebtedness of others guaranteed
by the Company) other than the Securities, whether outstanding on the date of
this Indenture or thereafter created, incurred or assumed, which is (i) for
money borrowed or (ii) evidenced by a note or similar instrument given in
connection with the acquisition of any businesses, properties or assets of any
kind and (b) amendments, renewals, extensions, modifications and refundings of
any such indebtedness, unless in any case in the instrument creating or
evidencing any such indebtedness or pursuant to which the same is outstanding it
is provided that such indebtedness is not superior in right of payment to the
Securities.

                  "Series A Preferred Shares" means __% Convertible Exchangeable
Principal-Protected Preferred Shares, Series A, par value $0.01 per share, of
the Company, which are subject to conversion into Common Shares or exchange into
Securities.

                  "Special Record Date" for the payment of any Defaulted
Interest means a date fixed by the Trustee pursuant to Section 307.

                  "Stated Maturity," when used with respect to any Security or
any instalment of interest thereon, means the

                                      -7-

   18
date specified in such Security as the fixed date on which the principal of such
Security or such instalment of interest is due and payable.

                  "Subsidiary" means a corporation more than 50% of the
outstanding voting shares of which are owned, directly or indirectly, by the
Company or by one or more other Subsidiaries, or by the Company and one or more
other Subsidiaries. For the purposes of this definition, "voting shares" means
shares which ordinarily have voting power for the election of directors, whether
at all times or only so long as no senior class of shares has such voting power
by reason of any contingency.

                  "Trading Day" means a day on which the Common Shares (a) are
not suspended from trading on any national or regional securities exchange or
association or over-the-counter market at the close of business and (b) have
traded at least once on the national or regional securities exchange or
association or over-the-counter market that is the primary market for the
trading of such security.

                  "Trustee" means the Person named as the "Trustee" in the first
paragraph of this instrument until a successor Trustee shall have become such
pursuant to the applicable provisions of this Indenture, and thereafter
"Trustee" shall mean such successor Trustee.

                  "Trust Indenture Act" means the Trust Indenture Act of 1939 as
in force at the date as of which this instrument was executed; provided,
however, that in the event the Trust Indenture Act of 1939 is amended after such
date, "Trust Indenture Act" means, to the extent required by any such amendment,
the Trust Indenture Act of 1939 as so amended.

                  "Vice President," when used with respect to the Company or the
Trustee, means any vice president, whether or not designated by a number or a
word or words added before or after the title "vice president,"

SECTION 102. Compliance Certificates and Opinions.

                  Upon any application or request by the Company to the Trustee
to take any action under any provision of this Indenture, the Company shall
furnish to the Trustee such certificates and opinions as may be required under
the Trust Indenture Act. Each such certificate or opinion shall be given in the
form of an Officers' Certificate, if to be 

                                      -8-

   19
given by an officer of the Company, or an Opinion of Counsel, if to be given by
counsel, and shall comply with the requirements of the Trust Indenture Act and
any other requirement set forth in this Indenture.

                  Every certificate or opinion with respect to compliance with a
condition or covenant provided for in this Indenture shall include

                  (1) a statement that each individual signing such certificate
         or opinion has read such covenant or condition and the definitions
         herein relating thereto;

                  (2) a brief statement as to the nature and scope of the
         examination or investigation upon which the statements or opinions
         contained in such certificate or opinion are based;

                  (3) a statement that, in the opinion of each such individual,
         he has made such examination or investigation as is necessary to enable
         him to express an informed opinion as to whether or not such covenant
         or condition has been complied with; and

                  (4) a statement as to whether, in the opinion of each such
         individual, such condition or covenant has been complied with.

SECTION 103. Form of Documents Delivered to Trustee.

                  In any case where several matters are required to be certified
by, or covered by an opinion of, any specified Person, it is not necessary that
all such matters be certified by, or covered by the opinion of, only one such
Person, or that they be so certified or covered by only one document, but one
such Person may certify or give an opinion with respect to some matters and one
or more other such Persons as to other matters, and any such Person may certify
or give an opinion as to such matters in one or several documents.

                  Any certificate or opinion of an officer of the Company may be
based, insofar as it relates to legal matters, upon a certificate or opinion of,
or representations by, counsel, unless such officer knows, or in the exercise of
reasonable care should know, that the certificate or opinion or representations
with respect to the matters upon which his certificate or opinion is based are
erroneous. Any such certificate or opinion of counsel 

                                      -9-

   20
may be based, insofar as it relates to factual matters, upon a certificate or
opinion of, or representations by, an officer or officers of the Company stating
that the information with respect to such factual matters is in the possession
of the Company, unless such counsel knows, or in the exercise of reasonable care
should know, that the certificate or opinion or representations with respect to
such matters are erroneous.

                  Where any Person is required to make, give or execute two or
more applications, requests, consents, certificates, statements, opinions or
other instruments under this Indenture, they may, but need not, be consolidated
and form one instrument.

SECTION 104. Acts of Holders; Record Dates.

                  (a) Any request, demand, authorization, direction, notice,
consent, waiver or other action provided by this Indenture to be given or taken
by Holders may be embodied in and evidenced by one or more instruments of
substantially similar tenor signed by such Holders in person or by agent duly
appointed in writing; and, except as herein otherwise expressly provided, such
action shall become effective when such instrument or instruments are delivered
to the Trustee and, where it is hereby expressly required, to the Company. Such
instrument or instruments (and the action embodied therein and evidenced
thereby) are herein sometimes referred to as the "Act" of the Holders signing
such instrument or instruments. Proof of execution of any such instrument or of
a writing appointing any such agent shall be sufficient for any purpose of this
Indenture and (subject to Section 601) conclusive in favor of the Trustee and
the Company, if made in the manner provided in this Section.

                  (b) The fact and date of the execution by any Person of any
such instrument or writing may be proved by the affidavit of a witness of such
execution or by a certificate of a notary public or other officer authorized by
law to take acknowledgments of deeds, certifying that the individual signing
such instrument or writing acknowledged to him the execution thereof. Where such
execution is by a signer acting in a capacity other than his individual
capacity, such certificate or affidavit shall also constitute sufficient proof
of his authority. The fact and date of the execution of any such instrument or
writing, or the authority of the Person executing the same, may also be 

                                      -10-

   21
proved in any other manner which the Trustee deems sufficient.

                  (c) The Company may, in the circumstances permitted by the
Trust Indenture Act, fix any day as the record date for the purpose of
determining the Holders entitled to give or take any request, demand,
authorization, direction, notice, consent, waiver or other action, or to vote on
any action, authorized or permitted to be given or taken by Holders. If not set
by the Company prior to the first solicitation of a Holder made by any Person in
respect of any such action, or, in the case of any such vote, prior to such
vote, the record date for any such action or vote shall be the 30th day (or, if
later, the date of the most recent list of Holders required to be provided
pursuant to Section 701) prior to such first solicitation or vote, as the case
may be. With regard to any record date, only the Holders on such date (or their
duly designated proxies) shall be entitled to give or take, or vote on, the
relevant action.

                  (d) The ownership of Securities shall be proved by the
Security Register.

                  (e) Any request, demand, authorization, direction, notice,
consent, waiver or other Act of the Holder of any Security shall bind every
future Holder of the same Security and the Holder of every Security issued upon
the registration of transfer thereof or in exchange therefor or in lieu thereof
in respect of anything done, omitted or suffered to be done by the Trustee or
the Company in reliance thereon, whether or not notation of such action is made
upon such Security.

SECTION 105. Notices, Etc., to Trustee and Company.

                  Any request, demand, authorization, direction, notice,
consent, waiver or Act of Holders or other document provided or permitted by
this Indenture to be made upon, given or furnished to, or filed with,

                  (1) the Trustee by any Holder or by the Company shall be
         sufficient for every purpose hereunder if made, given, furnished or
         filed in writing to or with the Trustee at its Corporate Trust Office,
         Attention: _______________, or

                  (2) the Company by the Trustee or by any Holder shall be
         sufficient for every purpose hereunder (unless 

                                      -11-

   22
         otherwise herein expressly provided) if in writing and mailed,
         first-class postage prepaid, to the Company addressed to it at the
         address of its principal office specified in the first paragraph of
         this instrument or at any other address previously furnished in writing
         to the Trustee by the Company.

SECTION 106. Notice to Holders; Waiver.

                  Where this Indenture provides for notice to Holders of any
event, such notice shall be sufficiently given (unless otherwise herein
expressly provided) if in writing and mailed, first-class postage prepaid, to
each Holder affected by such event, at his address as it appears in the Security
Register, not later than the latest date (if any), and not earlier than the
earliest date (if any), prescribed for the giving of such notice. In any case
where notice to Holders is given by mail, neither the failure to mail such
notice, nor any defect in any notice so mailed, to any particular Holder shall
affect the sufficiency of such notice with respect to other Holders. Where this
Indenture provides for notice in any manner, such notice may be waived in
writing by the Person entitled to receive such notice, either before or after
the event, and such waiver shall be the equivalent of such notice. Waivers of
notice by Holders shall be filed with the Trustee, but such filing shall not be
a condition precedent to the validity of any action taken in reliance upon such
waiver.

                  In case by reason of the suspension of regular mail service or
by reason of any other cause it shall be impracticable to give such notice by
mail, then such notification as shall be made with the approval of the Trustee
shall constitute a sufficient notification for every purpose hereunder.

SECTION 107. Conflict with Trust Indenture Act.

                  If any provision hereof limits, qualifies or conflicts with a
provision of the Trust Indenture Act that is required under such Act to be a
part of and govern this Indenture, the latter provision shall control. If any
provision of this Indenture modifies or excludes any provision of the Trust
Indenture Act that may be so modified or excluded, the latter provision shall be
deemed to apply to this Indenture as so modified or to be excluded, as the case
may be.

                                      -12-

   23
SECTION 108. Effect of Headings and Table of Contents.

                  The Article and Section headings herein and the Table of
Contents are for convenience only and shall not affect the construction hereof.

SECTION 109. Successors and Assigns.

                  All covenants and agreements in this Indenture by the Company
shall bind its successors and assigns, whether so expressed or not.

SECTION 110. Separability Clause.

                  In case any provision in this Indenture or in the Securities
shall be invalid, illegal or unenforceable, the validity, legality and
enforceability of the remaining provisions shall not in any way be affected or
impaired thereby.

SECTION 111. Benefits of Indenture.

                  Nothing in this Indenture or in the Securities, express or
implied, shall give to any Person, other than the parties hereto and their
successors hereunder, the holders of Senior Indebtedness and the Holders of
Securities, any benefit or any legal or equitable right, remedy or claim under
this Indenture.

SECTION 112. Governing Law.

                  This Indenture and the Securities shall be governed by and
construed in accordance with the laws of the State of New York.

SECTION 113. Legal Holidays.

                  In any case where any Interest Payment Date or Stated Maturity
of any Security shall not be a Business Day, then (notwithstanding any other
provision of this Indenture or of the Securities) payment of interest or
principal need not be made on such date, but may be made on the next succeeding
Business Day with the same force and effect as if made on the Interest Payment
Date or at the Stated Maturity, provided that no interest shall accrue for the
period from 

                                      -13-

   24
and after such Interest Payment Date or Stated Maturity, as the case may be.

                                   ARTICLE TWO

                                 Security Forms

SECTION 201. Forms Generally.

                  The Securities and the Trustee's certificates of
authentication shall be in substantially the forms set forth in this Article,
with such appropriate insertions, omissions, substitutions and other variations
as are required or permitted by this Indenture, and may have such letters,
numbers or other marks of identification and such legends or endorsements placed
thereon as may be required to comply with the rules of any securities exchange
or as may, consistently herewith, be determined by the officers executing such
Securities, as evidenced by their execution of the Securities.

                  Upon their original issuance, the Securities shall be issued
in the form of one or more Global Securities registered in the name of the
Depositary or its nominee and deposited with a custodian for the Depositary, for
credit by the Depositary to the respective accounts of beneficial owners of the
Securities represented thereby (or such other accounts as they may direct).

                  The definitive Securities, if any, shall be printed,
lithographed or engraved or produced by any combination of these methods on
steel engraved borders or may be produced in any other manner permitted by the
rules of any securities exchange on which the Securities may be listed, all as
determined by the officers executing such Securities, as evidenced by their
execution of such Securities.

SECTION 202. Form of Face of Security.

                  [If a Global Security, then insert -- THIS SECURITY IS A
GLOBAL SECURITY WITHIN THE MEANING OF THE INDENTURE HEREINAFTER REFERRED TO AND
IS REGISTERED IN THE NAME OF A DEPOSITARY OR A NOMINEE THEREOF. THIS SECURITY
MAY NOT BE EXCHANGEABLE IN WHOLE OR IN PART FOR A SECURITY REGISTERED, AND NO
TRANSFER OF THIS SECURITY IN WHOLE OR IN PART MAY BE REGISTERED, IN THE NAME OF
ANY PERSON OTHER THAN 

                                      -14-

   25
SUCH DEPOSITARY OR A NOMINEE THEREOF, EXCEPT IN THE LIMITED CIRCUMSTANCES
DESCRIBED IN THE INDENTURE.]

                  [If a Global Security to be held by The Depository Trust
Company, then insert -- UNLESS THIS CERTIFICATE IS PRESENTED BY AN AUTHORIZED
REPRESENTATIVE OF THE DEPOSITORY TRUST COMPANY, A NEW YORK CORPORATION ("DTC"),
TO THE ISSUER OR ITS AGENT FOR REGISTRATION OF TRANSFER, EXCHANGE OR PAYMENT,
AND ANY CERTIFICATE ISSUED IS REGISTERED IN THE NAME OF CEDE & CO. OR IN SUCH
OTHER NAME AS IS REQUESTED BY AN AUTHORIZED REPRESENTATIVE OF DTC (AND ANY
PAYMENT IS MADE TO CEDE & CO. OR TO SUCH OTHER ENTITY AS IS REQUESTED BY AN
AUTHORIZED REPRESENTATIVE OF DTC), ANY TRANSFER, PLEDGE, OR OTHER USE HEREOF FOR
VALUE OR OTHERWISE BY OR TO ANY PERSON IS WRONGFUL INASMUCH AS THE REGISTERED
OWNER HEREOF, CEDE & CO., HAS AN INTEREST HEREIN.]

                              MICROSOFT CORPORATION

                  ____% Convertible Subordinated Notes due 1999

No. __________                                                        $________

                  Microsoft Corporation, a corporation duly organized and
existing under the laws of Washington (herein called the "Company", which term
includes any successor Person under the Indenture hereinafter referred to), for
value received, hereby promises to pay to __________________, or registered
assigns, the principal sum of _____________________ Dollars [if this Security is
a Global Security, then insert: (which principal amount may from time to time be
increased or decreased to such other principal amounts (which, taken together
with the principal amounts of all other Outstanding Securities, shall not exceed
$__________ in the aggregate at any time) by adjustments made on the records of
the Trustee hereinafter referred to in accordance with the Indenture)] on
____________ (the "Conversion Date"); provided, however, that at any time not
more than 20 Trading Days nor fewer than two Trading Days immediately prior to,
but not including, the Conversion Date, the holder of a beneficial interest in
this [Global] Security representing such holder's interest in a __% Convertible
Subordinated Note due 1999 (a "Security" or "Convertible Note") may elect (a
"Conversion Election"), by written notice to the Trustee, to convert such
interest, on the Conversion Date, into the right to receive in respect of each
Convertible Note the sum of (i) the Conversion Amount (as defined below) payable
at the Company's option in either Common Shares or in cash, plus (ii) the
Additional Amount (as defined below) payable 

                                      -15-

   26
in cash. In the event that such holder does not make a timely Conversion
Election, such holder shall receive on the Conversion Date, in lieu of the
Conversion Amount and the Additional Amount and in full satisfaction of such
Convertible Note, the principal sum of $[ ] in cash for each Convertible Note.
The Company will mail written notice of its election to pay the Conversion
Amount in either Common Shares or cash to each holder of record of Convertible
Notes not less than 30 Trading Days nor more than 45 Trading Days prior to the
Conversion Date and will include with such notice a description of the procedure
for making a Conversion Election. The "Conversion Amount" means an amount
(payable in either Common Shares or cash) for each Convertible Note equal to the
Current Market Price of Common Shares multiplied by the product of (x) .995 and
(y) the Convertible Note Exchange Rate. The Convertible Note Exchange Rate is
equal to (a) if the Current Market Price of the Common Shares is greater than or
equal to $_______ per share (the "Threshold Price"), a ratio equal to the
Threshold Price divided by the Current Market Price, (b) if the Current Market
Price is less than the Threshold Price but greater than the Initial Price, a
ratio of 1.0, and (c) if the Current Market Price is less than or equal to the
Initial Price, a ratio equal to the Initial Price divided by the Current Market
Price, subject in each case to adjustments in certain events as provided in the
Indenture. The "Additional Amount" means an amount (payable in cash) in respect
of each Convertible Note equal to [$ Equal to .005 of Initial Price of the
Common Shares; to be filled in at pricing]. In addition, the Company hereby
promises to pay interest hereon from _____________* or from the most recent
Interest Payment Date to which interest has been paid or duly provided for,
quarterly ____________, ________, ________ and ___________ in each year,
commencing ___________, at the rate of ___% per annum, until the principal
hereof is paid or made available for payment. The interest so payable, and
punctually paid or duly provided for, on any Interest Payment Date will, as
provided in such Indenture, be paid to the Person in whose name this Security
(or one or more Predecessor Securities) is registered at the close of business
on the Regular Record Date for such interest, which shall be the _________ or
__________ (whether or not a Business Day), as the case may be, next preceding
such Interest Payment Date. Any such interest not so punctually paid or duly
provided for will forthwith cease to be payable to the Holder on such Regular
Record Date and may either be paid to the Person in whose name this Security (or
one or more Predecessor Securities) is registered at the close of business on a
Special Record Date for the payment 

* Insert date on which the Convertible Notes are issued in exchange for the
  Series A Preferred Shares.

                                      -16-

   27
of such Defaulted Interest to be fixed by the Trustee, notice whereof shall be
given to holders of Securities not less than 10 days prior to such Special
Record Date, or be paid at any time in any other lawful manner not inconsistent
with the requirements of any securities exchange on which the Securities may be
listed, and upon such notice as may be required by such exchange, all as more
fully provided in said Indenture. Payment of the principal of and interest on
this Security will be made at the office or agency of the Company maintained for
that purpose in ________, in such coin or currency of the United States of
America as at the time of payment is legal tender for payment of public and
private debts; provided, however, that at the option of the Company payment of
interest may be made by check mailed to the address of the Person entitled
thereto as such address shall appear in the Security Register.

                  The Company will mail written notice of its election to pay
the Conversion Amount in either Common Shares or cash to each holder of record
of Convertible Notes not less than 30 Trading Days nor more than 45 Trading Days
prior to the Conversion Date. In the case of election by the Company to pay the
Conversion Amount in Common Shares the Company will issue the number of full
Common Shares issuable in payment thereof. No fractional Common Shares will be
issued on payment of the Conversion Amount, but in lieu thereof, such fractional
interest shall be rounded down to the next whole share or an amount will be paid
in cash by the Company for such fractional interest based upon the Current
Market Price.

                  Reference is hereby made to the further provisions of this
Security set forth on the reverse hereof, which further provisions shall for all
purposes have the same effect as if set forth at this place.

                  Unless the certificate of authentication hereon has been
executed by the Trustee referred to on the reverse hereof by manual signature,
this Security shall not be entitled to any benefit under the Indenture or be
valid or obligatory for any purpose.

         IN WITNESS WHEREOF, the Company has caused this instrument to be duly
executed under its corporate seal.

Dated:

                                             -------------------------

                                      -17-

   28



                                                      By_______________________


Attest:


- ------------------------------



SECTION 203.  Form of Reverse of Security.

                  This [Global] Security is one of a duly authorized issue of
Securities of the Company designated as its __% Convertible Subordinated Notes
Due 1999 (herein called the "Securities"), limited in aggregate principal amount
to $______, issued and to be issued under an Indenture, dated as of _______
(herein called the "Indenture"), between the Company and
________________________, as Trustee (herein called the "Trustee", which term
includes any successor trustee under the Indenture), to which Indenture and all
indentures supplemental thereto reference is hereby made for a statement of the
respective rights, limitations of rights, duties and immunities thereunder of
the Company, the Trustee, the holders of Senior Indebtedness and the holders of
the Securities and of the terms upon which the Securities are, and are to be,
authenticated and delivered.

                  The indebtedness evidenced by this Security is, to the extent
provided in the Indenture, subordinate and subject in right of payment to the
prior payment in full of all Senior Indebtedness, and this Security is issued
subject to the provisions of the Indenture with respect thereto. Each Holder of
this Security, by accepting the same, (a) agrees to and shall be bound by such
provisions, (b) authorizes and directs the Trustee on his behalf to take such
action as may be necessary or appropriate to effectuate the subordination so
provided and (c) appoints the Trustee his attorney-in-fact for any and all such
purposes.

                  If an Event of Default shall occur and be continuing, the
principal of all the Securities may be declared due and payable in the manner
and with the effect provided in the Indenture.

                  The Indenture permits, with certain exceptions as therein
provided, the amendment thereof and the modification of the rights and
obligations of the Company and the rights


                                  -18-
   29
of the holders of the Securities under the Indenture at any time by the Company
and the Trustee with the consent of the holders of 66 2/3% in aggregate
principal amount of the Securities at the time Outstanding. The Indenture also
contains provisions permitting the holders of specified percentages in aggregate
principal amount of the Securities at the time Outstanding, on behalf of the
holders of all the Securities, to waive compliance by the Company with certain
provisions of the Indenture and certain past defaults under the Indenture and
their consequences. Any such consent or waiver by the holders of the Securities
shall be conclusive and binding upon such holders and upon all future holders of
the Securities and of any Security issued upon the registration of transfer
hereof or in exchange herefor or in lieu hereof, whether or not notation of such
consent or waiver is made upon this Security.

                  [If a Global Security insert -- In the event of a deposit or
withdrawal of an interest in this Security (including upon an exchange,
transfer, redemption or repurchase of this Security in part only) effected in
accordance with the Applicable Procedures, the Security Registrar, upon receipt
of notice of such event from the Depositary's custodian for this Security, shall
make an adjustment on its records to reflect an increase or decrease of the
Outstanding principal amount of this Security resulting from such deposit or
withdrawal, as the case may be.]

                  No reference herein to the Indenture and no provision of this
Security or of the Indenture shall alter or impair the obligation of the
Company, which is absolute and unconditional, to pay the principal of and
interest on this Security at the times, place and rate, and in the coin or
currency, herein prescribed or to convert this Security as provided in the
Indenture.

                  As provided in the Indenture and subject to certain
limitations therein set forth, the transfer of this Security is registrable in
the Security Register, upon surrender of this Security for registration of
transfer at the office or agency of the Company in the Borough of Manhattan, the
City of New York, New York, duly endorsed by, or accompanied by a written
instrument of transfer in form satisfactory to the Company and the Security
Registrar duly executed by, the Holder hereof or his attorney duly authorized in
writing, and thereupon one or more new Securities, of authorized denominations
and for the same aggregate principal amount, will be issued to the designated
transferee or transferees.


                                      -19-
   30
                  The Securities will be evidenced by a global security, in
fully registered form without coupons, deposited with a custodian for and
registered in the name of a nominee of the Depositary. The Securities will be in
denominations of $[initial price].

                  No service charge shall be made for any such registration of
transfer, but the Company may require payment of a sum sufficient to cover any
tax or other governmental charge payable in connection therewith.

                  Prior to due presentment of this Security for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the Person in whose name this Security is registered as the owner
hereof for all purposes, whether or not this Security be overdue, and neither
the Company, the Trustee nor any such agent shall be affected by notice to the
contrary.

                  All terms used in this Security which are defined in the
Indenture shall have the meanings assigned to them in the Indenture.


SECTION 204. Form of Trustee's Certificate of Authentication.

                  This is one of the Securities referred to in the
within-mentioned Indenture.


                                                      -------------------------,
                                                                      as Trustee


                                                      By _______________________
                                                              Authorized Officer



                                  ARTICLE THREE

                                 The Securities

SECTION 301.  Title and Terms.

                  The aggregate principal amount of Securities which may be
authenticated and delivered under this Indenture is


                                     -20-
   31
limited to $___________, except for Securities authenticated and delivered upon
registration of transfer of, or in exchange for, or in lieu of, other Securities
pursuant to Sections 304, 305, 306, 906 or 1201.

                  The Securities shall be known and designated as the "__%
Convertible Subordinated Notes due 1999" of the Company. Their Stated Maturity
shall be ____________, 1999, and they shall bear interest at the rate of ____%
per annum, from the date or dates on which Securities are issued for Series A
Preferred Shares or from the most recent Interest Payment Date to which interest
has been paid or duly provided for, as the case may be, payable quarterly on
__________, _________, __________ and ________, commencing ___________, until
the principal thereof is paid or made available for payment.

                  The principal of and interest on the Securities shall be
payable at the office or agency of the Company in the Borough of Manhattan, the
City of New York, New York, maintained for such purpose and at any other office
or agency maintained by the Company for such purpose; provided, however, that at
the option of the Company payment of interest may be made by check mailed to the
address of the Person entitled thereto as such address shall appear in the
Security Register.

                  The Securities shall be subordinated in right of payment to
Senior Indebtedness as provided in Article Eleven.

                  The Securities shall be convertible as provided in Article
Twelve.

   
                  Upon receipt by the Trustee of an Officer's Certificate, dated
as of a dividend payment date on the Series A Preferred Shares, stating (i) that
the Company has elected to exchange Series A Preferred Shares for Securities,
(ii) the amount of Securities to be issued in such exchange and (iii) that,
after giving effect to such exchange, (A) the aggregate outstanding principal
balance of Securities will not be less than $250,000,000, (B) that, if there
will be additional Series A Preferred Shares outstanding, they will have an
aggregate liquidating distribution amount of not less than $250,000,000, (C) all
accrued and unpaid interest on any outstanding Securities has been paid in full,
(D) all accrued and unpaid dividends on the Series A Preferred Shares have been
paid in full, and (E) no Event of Default, or event which with the passage of
time or the giving of notice would become an Event of Default, has occurred, the
Trustee shall authenticate and


                                      -21-
   32
deliver, on such dividend payment date, in accordance with this Indenture such
amount of Securities as are specified by the Company to be issued in such
exchange. The Company will mail written notice to the Trustee of its intention
to exchange Series A Preferred Shares for Securities not less than 30 Trading
Days prior to the date fixed for exchange.
    

SECTION 302.  Denominations.

                  The Securities will be evidenced by one or more Global
Securities, in fully registered form without coupons, deposited with a custodian
for and registered in the name of the Depository or a nominee of the Depositary.
The Securities will be in denominations of $[initial price].


SECTION 303. Execution, Authentication, Delivery and Dating.

                  The Securities shall be executed on behalf of the Company by
its Chairman of the Board, its Vice Chairman of the Board, its President or one
of its Vice Presidents, under its corporate seal reproduced thereon attested by
its Secretary or one of its Assistant Secretaries. The signature of any of these
officers on the Securities may be manual or facsimile.

                  Securities bearing the manual or facsimile signatures of
individuals who were at any time the proper officers of the Company shall bind
the Company, notwithstanding that such individuals or any of them have ceased to
hold such offices prior to the authentication and delivery of such Securities or
did not hold such offices at the date of such Securities.

                  At any time and from time to time after the execution and
delivery of this Indenture, the Company may deliver Securities executed by the
Company to the Trustee for authentication, together with a Company Order for the
authentication and delivery of such Securities; and the Trustee in accordance
with such Company Order shall authenticate and deliver such Securities as in
this Indenture provided and not otherwise.

                  Each Security shall be dated the date of its authentication.

                  No Security shall be entitled to any benefit under this
Indenture or be valid or obligatory for any purpose unless there appears on such
Security a certificate of


                                  -22-
   33
authentication substantially in the form provided for herein executed by the
Trustee by manual signature, and such certificate upon any Security shall be
conclusive evidence, and the only evidence, that such Security has been duly
authenticated and delivered hereunder.


SECTION 304.  Temporary Securities.

                  Pending the preparation of definitive Securities, if any, the
Company may execute, and upon Company Order the Trustee shall authenticate and
deliver, temporary Securities which are printed, lithographed, typewritten,
mimeographed or otherwise produced, in any authorized denomination,
substantially of the tenor of the definitive Securities in lieu of which they
are issued and with such appropriate insertions, omissions, substitutions and
other variations as the officers executing such Securities may determine, as
evidenced by their execution of such Securities.

                  If temporary Securities are issued, the Company will cause
definitive Securities to be prepared without unreasonable delay. After the
preparation of definitive Securities, the temporary Securities shall be
exchangeable for definitive Securities upon surrender of the temporary
Securities at any office or agency of the Company designated pursuant to Section
1002, without charge to the Holder. Upon surrender for cancellation of any one
or more temporary Securities the Company shall execute and the Trustee shall
authenticate and deliver in exchange therefor a like principal amount of
definitive Securities of authorized denominations. Until so exchanged the
temporary Securities shall in all respects be entitled to the same benefits
under this Indenture as definitive Securities.


SECTION 305. Registration, Registration of Transfer and Exchange.

                  (a) The Company shall cause to be kept at the Corporate Trust
Office of the Trustee a register (the register maintained in such office and in
any other office or agency designated pursuant to Section 1002 being herein
sometimes collectively referred to as the "Security Register") in which, subject
to such reasonable regulations as it may prescribe, the Company shall provide
for the registration of Securities and of transfers of Securities. The Trustee
is hereby appointed "Security Registrar" for the purpose of registering
Securities and transfers of Securities as herein provided.


                                      -23-
   34
                  Upon surrender for registration of transfer of any Security at
an office or agency of the Company designated pursuant to Section 1002 for such
purpose, the Company shall execute, and the Trustee shall authenticate and
deliver, in the name of the designated transferee or transferees, one or more
new Securities of any authorized denominations and of a like aggregate principal
amount.

                  At the option of the Holder, Securities may be exchanged for
other Securities of any authorized denominations and of a like aggregate
principal amount, upon surrender of the Securities to be exchanged at such
office or agency. Whenever any Securities are so surrendered for exchange, the
Company shall execute, and the Trustee shall authenticate and deliver, the
Securities which the Holder making the exchange is entitled to receive.

                  All Securities issued upon any registration of transfer or
exchange of Securities shall be the valid obligations of the Company, evidencing
the same debt, and entitled to the same benefits under this Indenture, as the
Securities surrendered upon such registration of transfer or exchange.

                  Every Security presented or surrendered for registration of
transfer or for exchange shall (if so required by the Company or the Trustee) be
duly endorsed, or be accompanied by a written instrument of transfer in form
satisfactory to the Company and the Security Registrar duly executed, by the
Holder thereof or his attorney duly authorized in writing.

                  No service charge shall be made for any registration of
transfer or exchange of Securities, but the Company may require payment of a sum
sufficient to cover any tax or other governmental charge that may be imposed in
connection with any registration of transfer or exchange of Securities, other
than exchanges pursuant to Section 304, 906 or 1201 not involving any transfer.

                  (b) The provisions of Clauses (1), (2), (3), (4) and (5) below
shall apply only to Global Securities:

                  (1) Each Global Security authenticated under this Indenture
         shall be registered in the name of the Depositary or a nominee thereof
         and delivered to the Depositary or a nominee thereof or custodian
         therefor, and each such Global Security shall constitute a single
         Security for all purposes of this Indenture.


                                      -24-
   35
                  (2) Notwithstanding any other provision in this Indenture, no
         Global Security may be exchanged in whole or in part for Securities
         registered, and no transfer of a Global Security in whole or in part
         may be registered, in the name of any Person other than the Depositary
         or a nominee thereof unless (A) the Depositary (i) has notified the
         Company that it is unwilling or unable to continue as Depositary for
         such Global Security and the Company thereupon fails to appoint a
         successor Depository or (ii) has ceased to be a clearing agency
         registered under the Exchange Act, (B) the Company, at its option,
         notifies the Trustee in writing that it elects to cause the issuance of
         the Securities in definitive registered certificated form or (C) there
         shall have occurred and be continuing an Event of Default or any event
         which after notice or lapse of time or both would be an Event of
         Default with respect to the Securities evidenced by such Global
         Security.

                  (3) If any Global Security is to be exchanged for other
         Securities or cancelled in whole, it shall be surrendered by or on
         behalf of the Depositary or its nominee to the Trustee, as Security
         Registrar, for exchange or cancellation as provided in this Article
         Three. If any Global Security is to be exchanged for other Securities
         or cancelled in part, or if another Security is to be exchanged in
         whole or in part for a beneficial interest in any Global Security, then
         either (i) such Global Security shall be so surrendered for exchange or
         cancellation as provided in this Article Three or (ii) the principal
         amount thereof shall be reduced or increased by an amount equal to the
         portion thereof to be so exchanged or cancelled, or equal to the
         principal amount of such other Security to be so exchanged for a
         beneficial interest therein, as the case may be, by means of an
         appropriate adjustment made on the records of the Trustee, as Security
         Registrar, whereupon the Trustee, in accordance with the Applicable
         Procedures, shall instruct the Depositary or its authorized
         representative to make a corresponding adjustment to its records. Upon
         any such surrender or adjustment of a Global Security, the Trustee
         shall, subject to Section 305(b)(2) and as otherwise provided in this
         Article Three, authenticate and deliver any Securities issuable in
         exchange for such Global Security (or any portion thereof) to or upon
         the order of, and registered in such names as may be directed by, the
         Depositary or its authorized representative. Upon


                                      -25-
   36
         the request of the Trustee in connection with the occurrence of any of
         the events specified in the preceding paragraph, the Company shall
         promptly make available to the Trustee a reasonable supply of
         Securities that are not in the form of Global Securities. The Trustee
         shall be entitled to rely upon any order, direction or request of the
         Depositary or its authorized representative which is given or made
         pursuant to this Article Three if such order, direction or request is
         given or made in accordance with the Applicable Procedures.

                  (4) Every Security authenticated and delivered upon
         registration of transfer of, or in exchange for or in lieu of, a Global
         Security or any portion thereof, whether pursuant to this Section ,
         Section 304, 306, or 906 or otherwise, shall be authenticated and
         delivered in the form of, and shall be, a Global Security, unless such
         Security is registered in the name of a Person other than the
         Depositary or a nominee thereof.

                  (5) None of the Company, the Trustee, any agent of the
         Trustee, any Paying Agent or the Security Registrar will have any
         responsibility or liability for any aspect of the Depository's records
         (or the records of the participant of such Depository) relating to or
         payments made on account of beneficial ownership interests of a Global
         Security or for maintaining, supervising or reviewing any records of
         the Depository relating to such beneficial ownership interests.


SECTION 306. Mutilated, Destroyed, Lost and Stolen Securities.

                  If any mutilated Security is surrendered to the Trustee, the
Company shall execute and the Trustee shall authenticate and deliver in exchange
therefor a new Security of like tenor and principal amount and bearing a number
not contemporaneously outstanding.

                  If there shall be delivered to the Company and the Trustee (i)
evidence to their satisfaction of the destruction, loss or theft of any Security
and (ii) such security or indemnity as may be required by them to save each of
them and any agent of either of them harmless, then, in the absence of notice to
the Company or the Trustee that such Security has been acquired by a bona fide
purchaser, the Company shall execute and the Trustee shall authenticate and
deliver, in lieu of any such destroyed, lost or stolen


                                      -26-
   37

Security, a new Security of like tenor and principal amount and bearing a number
not contemporaneously outstanding.

                  In case any such mutilated, destroyed, lost or stolen Security
has become or is about to become due and payable, the Company in its discretion
may, instead of issuing a new Security, pay such Security.

                  Upon the issuance of any new Security under this Section , the
Company may require the payment of a sum sufficient to cover any tax or other
governmental charge that may be imposed in relation thereto and any other
expenses (including the fees and expenses of the Trustee) connected therewith.

                  Every new Security issued pursuant to this Section in lieu of
any destroyed, lost or stolen Security shall constitute an original additional
contractual obligation of the Company, whether or not the destroyed, lost or
stolen Security shall be at any time enforceable by anyone, and shall be
entitled to all the benefits of this Indenture equally and proportionately with
any and all other Securities duly issued hereunder.

                  The provisions of this Section are exclusive and shall
preclude (to the extent lawful) all other rights and remedies with respect to
the replacement or payment of mutilated, destroyed, lost or stolen Securities.


SECTION 307. Payment of Interest; Interest Rights Preserved.

                  Interest on any Security which is payable, and is punctually
paid or duly provided for, on any Interest Payment Date shall be paid to the
Person in whose name that Security (or one or more Predecessor Securities) is
registered at the close of business on the Regular Record Date for such
interest.

                  Any interest on any Security which is payable, but is not
punctually paid or duly provided for, on any Interest Payment Date (herein
called "Defaulted Interest") shall forthwith cease to be payable to the Holder
on the relevant Regular Record Date by virtue of having been such Holder, and
such Defaulted Interest may be paid by the Company, at its election in each
case, as provided in Clause (1) or (2) below:


                                      -27-
   38
                  (1) The Company may elect to make payment of any Defaulted
         Interest to the Persons in whose names the Securities (or their
         respective Predecessor Securities) are registered at the close of
         business on a Special Record Date for the payment of such Defaulted
         Interest, which shall be fixed in the following manner. The Company
         shall notify the Trustee in writing of the amount of Defaulted Interest
         proposed to be paid on each Security and the date of the proposed
         payment, and at the same time the Company shall deposit with the
         Trustee an amount of money equal to the aggregate amount proposed to be
         paid in respect of such Defaulted Interest or shall make arrangements
         satisfactory to the Trustee for such deposit prior to the date of the
         proposed payment, such money when deposited to be held in trust for the
         benefit of the Persons entitled to such Defaulted Interest as in this
         Clause provided. Thereupon the Trustee shall fix a Special Record Date
         for the payment of such Defaulted Interest which shall be not more than
         15 days and not less than 10 days prior to the date of the proposed
         payment and not less than 10 days after the receipt by the Trustee of
         the notice of the proposed payment. The Trustee shall promptly notify
         the Company of such Special Record Date and, in the name and at the
         expense of the Company, shall cause notice of the proposed payment of
         such Defaulted Interest and the Special Record Date therefor to be
         mailed, first-class postage prepaid, to each Holder at his address as
         it appears in the Security Register, not less than 10 days prior to
         such Special Record Date. Notice of the proposed payment of such
         Defaulted Interest and the Special Record Date therefor having been so
         mailed, such Defaulted Interest shall be paid to the Persons in whose
         names the Securities (or their respective Predecessor Securities) are
         registered at the close of business on such Special Record Date and
         shall no longer be payable pursuant to the following Clause (2).

                  (2) The Company may make payment of any Defaulted Interest in
         any other lawful manner not inconsistent with the requirements of any
         securities exchange on which the Securities may be listed, and upon
         such notice as may be required by such exchange, if, after notice given
         by the Company to the Trustee of the proposed payment


                                      -28-
   39
         pursuant to this Clause, such manner of payment shall be deemed
         practicable by the Trustee.

                  Subject to the foregoing provisions of this Section , each
Security delivered under this Indenture upon registration of transfer of or in
exchange for or in lieu of any other Security shall carry the rights to interest
accrued and unpaid, and to accrue, which were carried by such other Security.


SECTION 308.  Persons Deemed Owners.

                  Prior to due presentment of a Security for registration of
transfer, the Company, the Trustee and any agent of the Company or the Trustee
may treat the Person in whose name such Security is registered as the owner of
such Security for the purpose of receiving payment of principal of and (subject
to Section 307) interest on such Security and for all other purposes whatsoever,
whether or not such Security be overdue, and neither the Company, the Trustee
nor any agent of the Company or the Trustee shall be affected by notice to the
contrary.


SECTION 309.  Cancellation.

                  All Securities surrendered for payment, registration of
transfer or exchange or conversion shall, if surrendered to any Person other
than the Trustee, be delivered to the Trustee and shall be promptly cancelled by
it. The Company may at any time deliver to the Trustee for cancellation any
Securities previously authenticated and delivered hereunder which the Company
may have acquired in any manner whatsoever, and all Securities so delivered
shall be promptly cancelled by the Trustee. No Securities shall be authenticated
in lieu of or in exchange for any Securities cancelled as provided in this
Section , except as expressly permitted by this Indenture. All cancelled
Securities held by the Trustee shall be disposed of as directed by a Company
Order.


SECTION 310.  Computation of Interest.

                  Interest on the Securities shall be computed on the basis of a
360-day year of twelve 30-day months.

SECTION 311.  Listing of Securities.


                                      -29-
   40
                  An Application will be made to have the Securities quoted on
the Nasdaq National Market under the symbol " ."

                                  ARTICLE FOUR

                           Satisfaction and Discharge


SECTION  401.  Satisfaction and Discharge of Indenture.

                  This Indenture shall cease to be of further effect (except as
to any surviving rights of conversion, registration of transfer or exchange of
Securities herein expressly provided for), and the Trustee, on demand of and at
the expense of the Company, shall execute proper instruments acknowledging
satisfaction and discharge of this Indenture, when

                  (1)  either

                           (A) all Securities theretofore authenticated and
                  delivered (other than (i) Securities which have been
                  destroyed, lost or stolen and which have been replaced or paid
                  as provided in Section 306 and (ii) Securities for whose
                  payment money has theretofore been deposited in trust or
                  segregated and held in trust by the Company and thereafter
                  repaid to the Company or discharged from such trust, as
                  provided in Section 1003) have been delivered to the Trustee
                  for cancellation; or

                           (B) all such Securities not theretofore delivered to
                  the Trustee for cancellation have become due and payable at
                  their stated maturity and the Company has deposited or caused
                  to be deposited with the Trustee as trust funds in trust for
                  the purpose an amount sufficient to pay and discharge all
                  amounts due and payable in respect of such Securities not
                  theretofore delivered to the Trustee for cancellation.

                  (2) the Company has paid or caused to be paid all other sums
         payable hereunder by the Company; and


                                      -30-
   41
                  (3) the Company has delivered to the Trustee an Officers'
         Certificate and an Opinion of Counsel, each stating that all conditions
         precedent herein provided for relating to the satisfaction and
         discharge of this Indenture have been complied with.

Notwithstanding the satisfaction and discharge of this Indenture, the
obligations of the Company to the Trustee under Section 607, the obligations of
the Trustee to any Authenticating Agent under Section 614 and, if money shall
have been deposited with the Trustee pursuant to subclause (B) of Clause (1) of
this Section , the obligations of the Trustee under Section 402 and the last
paragraph of Section 1003 shall survive.


SECTION 402.  Application of Trust Money.

                  Subject to the provisions of the last paragraph of Section
1003, all money deposited with the Trustee pursuant to Section 401 shall be held
in trust and applied by it, in accordance with the provisions of the Securities
and this Indenture, to the payment, either directly or through any Paying Agent
(including the Company acting as its own Paying Agent) as the Trustee may
determine, to the Persons entitled thereto, of the principal and interest for
whose payment such money has been deposited with the Trustee.



                                  ARTICLE FIVE

                                    Remedies


SECTION 501.  Events of Default.

                  "Event of Default", wherever used herein, means any one of the
following events (whatever the reason for such Event of Default and whether it
shall be voluntary or involuntary or be effected by operation of law or pursuant
to any judgment, decree or order of any court or any order, rule or regulation
of any administrative or governmental body):

                  (1) default in the payment of any interest upon any Security
         when it becomes due and payable, and continuance of such default for a
         period of 30 days; or


                                      -31-
   42
                  (2) default in the payment of the principal (which for
         purposes of this Indenture shall be deemed to include the Conversion
         Amount with respect to any Security for which a Conversion Amount is
         applicable pursuant to Section 1201) of any Security at its Maturity;
         or

                  (3) default in the performance, or breach, of any covenant or
         warranty of the Company in this Indenture (other than a covenant or
         warranty a default in whose performance or whose breach is elsewhere in
         this Section specifically dealt with), and continuance of such default
         or breach for a period of 60 days after there has been given, by
         registered or certified mail, to the Company by the Trustee or to the
         Company and the Trustee by the Holders of at least 10% in principal
         amount of the Outstanding Securities a written notice specifying such
         default or breach and requiring it to be remedied and stating that such
         notice is a "Notice of Default" hereunder; or

                  (4) the entry by a court having jurisdiction in the premises
         of (A) a decree or order for relief in respect of the Company in an
         involuntary case or proceeding under any applicable Federal or State
         bankruptcy, insolvency, reorganization or other similar law or (B) a
         decree or order adjudging the Company a bankrupt or insolvent, or
         approving as properly filed a petition seeking reorganization,
         arrangement, adjustment or composition of or in respect of the Company
         under any applicable Federal or State law, or appointing a custodian,
         receiver, liquidator, assignee, trustee, sequestrator or other similar
         official of the Company or of any substantial part of its property, or
         ordering the winding up or liquidation of its affairs, and the
         continuance of any such decree or order for relief or any such other
         decree or order unstayed and in effect for a period of 60 consecutive
         days; or

                  (5) the commencement by the Company of a voluntary case or
         proceeding under any applicable Federal or State bankruptcy,
         insolvency, reorganization or other similar law or of any other case or
         proceeding to be adjudicated a bankrupt or insolvent, or the consent by
         it to the entry of a decree or order for relief in respect


                                      -32-
   43
         of the Company in an involuntary case or proceeding under any
         applicable Federal or State bankruptcy, insolvency, reorganization or
         other similar law or to the commencement of any bankruptcy or
         insolvency case or proceeding against it, or the filing by it of a
         petition or answer or consent seeking reorganization or relief under
         any applicable Federal or State law, or the consent by it to the filing
         of such petition or to the appointment of or taking possession by a
         custodian, receiver, liquidator, assignee, trustee, sequestrator or
         other similar official of the Company or of any substantial part of its
         property, or the making by it of an assignment for the benefit of
         creditors, or the admission by it in writing of its inability to pay
         its debts generally as they become due, or the taking of corporate
         action by the Company in furtherance of any such action.


SECTION  502.     Acceleration of Maturity; Rescission and Annulment.

                  If an Event of Default occurs and is continuing, then and in
every such case the Trustee or the Holders of not less than 25% in principal
amount of the Outstanding Securities may declare the principal of all the
Securities to be due and payable immediately, by a notice in writing to the
Company (and to the Trustee if given by Holders), and upon any such declaration
such principal shall become immediately due and payable.

                  At any time after such a declaration of acceleration has been
made and before a judgment or decree for payment of the money due has been
obtained by the Trustee as hereinafter in this Article provided, the Holders of
a majority in principal amount of the Outstanding Securities, by written notice
to the Company and the Trustee, may rescind and annul such declaration and its
consequences if

                  (1) the Company has paid or deposited with the Trustee a sum
         sufficient to pay

                           (A)  all overdue interest on all Securities,

                           (B) the principal (which for purposes of this
                  Indenture shall be deemed to include


                                      -33-
   44
                  the Conversion Amount with respect to any Security for which a
                  Conversion Amount is applicable pursuant to Section 1201) of
                  any Securities which have become due otherwise than by such
                  declaration of acceleration and interest thereon at the rate
                  borne by the Securities,

                           (C) to the extent that payment of such interest is
                  lawful, interest upon overdue interest at the rate borne by
                  the Securities, and

                           (D) all sums paid or advanced by the Trustee
                  hereunder and the reasonable compensation, expenses,
                  disbursements and advances of the Trustee, its agents and
                  counsel;

and

                  (2) all Events of Default, other than the non-payment of the
         principal of Securities which have become due solely by such
         declaration of acceleration, have been cured or waived as provided in
         Section 513.

No such rescission shall affect any subsequent default or impair any right
consequent thereon.


SECTION 503. Collection of Indebtedness and Suits for Enforcement by Trustee.

                  The Company covenants that if

                  (1) default is made in the payment of any interest on any
         Security when such interest becomes due and payable and such default
         continues for a period of 30 days, or

                  (2) default is made in the payment of the principal (which for
         purposes of this Indenture shall be deemed to include the Conversion
         Amount with respect to any Security for which a Conversion Amount is
         applicable pursuant to Section 1201) of any Security at the Maturity
         thereof,


                                      -34-
   45
the Company will, upon demand of the Trustee, pay to it, for the benefit of the
Holders of such Securities, the whole amount then due and payable on such
Securities for principal and interest, and, to the extent that payment of such
interest shall be legally enforceable, interest on any overdue principal and on
any overdue interest, at the rate borne by the Securities, and, in addition
thereto, such further amount as shall be sufficient to cover the costs and
expenses of collection, including the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel.

                  If an Event of Default occurs and is continuing, the Trustee
may in its discretion proceed to protect and enforce its rights and the rights
of the Holders by such appropriate judicial proceedings as the Trustee shall
deem most effectual to protect and enforce any such rights, whether for the
specific enforcement of any covenant or agreement in this Indenture or in aid of
the exercise of any power granted herein, or to enforce any other proper remedy.


SECTION 504.  Trustee May File Proofs of Claim.

                  In case of any judicial proceeding relative to the Company (or
any other obligor upon the Securities), its property or its creditors, the
Trustee shall be entitled and empowered, by intervention in such proceeding or
otherwise, to take any and all actions authorized under the Trust Indenture Act
in order to have claims of the Holders and the Trustee allowed in any such
proceeding. In particular, the Trustee shall be authorized to collect and
receive any moneys or other property payable or deliverable on any such claims
and to distribute the same; and any custodian, receiver, assignee, trustee,
liquidator, sequestrator or other similar official in any such judicial
proceeding is hereby authorized by each Holder to make such payments to the
Trustee and, in the event that the Trustee shall consent to the making of such
payments directly to the Holders, to pay to the Trustee any amount due it for
the reasonable compensation, expenses, disbursements and advances of the
Trustee, its agents and counsel, and any other amounts due the Trustee under
Section 607.

                  No provision of this Indenture shall be deemed to authorize
the Trustee to authorize or consent to or accept or adopt on behalf of any
Holder any plan of reorganization, arrangement, adjustment or composition
affecting the Securities or the rights of any Holder thereof or to


                                      -35-
   46

authorize the Trustee to vote in respect of the claim of any Holder in any such
proceeding.


SECTION 505. Trustee May Enforce Claims Without Possession of Securities.

                  All rights of action and claims under this Indenture or the
Securities may be prosecuted and enforced by the Trustee without the possession
of any of the Securities or the production thereof in any proceeding relating
thereto, and any such proceeding instituted by the Trustee shall be brought in
its own name as trustee of an express trust, and any recovery of judgment shall,
after provision for the payment of the reasonable compensation, expenses,
disbursements and advances of the Trustee, its agents and counsel, be for the
ratable benefit of the Holders of the Securities in respect of which such
judgment has been recovered.


SECTION 506.  Application of Money Collected.

                  Subject to Article Eleven any money collected by the Trustee
pursuant to this Article shall be applied in the following order, at the date or
dates fixed by the Trustee and, in case of the distribution of such money on
account of principal or interest, upon presentation of the Securities and the
notation thereon of the payment if only partially paid and upon surrender
thereof if fully paid:

                  FIRST: To the payment of all amounts due the Trustee under
         Section 607; and

                  SECOND: To the payment of the amounts then due and unpaid for
         principal of and interest on the Securities in respect of which or for
         the benefit of which such money has been collected, ratably, without
         preference or priority of any kind, according to the amounts due and
         payable on such Securities for principal and interest, respectively.


SECTION 507.  Limitation on Suits.

                  No Holder of any Security shall have any right to institute
any proceeding, judicial or otherwise, with respect to this Indenture, or for
the appointment of a


                                      -36-
   47
receiver or trustee, or for any other remedy hereunder, unless

                  (1) such Holder has previously given written notice to the
         Trustee of a continuing Event of Default;

                  (2) the Holders of not less than 25% in principal amount of
         the Outstanding Securities shall have made written request to the
         Trustee to institute proceedings in respect of such Event of Default in
         its own name as Trustee hereunder;

                  (3) such Holder or Holders have offered to the Trustee
         reasonable indemnity against the costs, expenses and liabilities to be
         incurred in compliance with such request;

                  (4) the Trustee for 60 days after its receipt of such notice,
         request and offer of indemnity has failed to institute any such
         proceeding; and

                  (5) no direction inconsistent with such written request has
         been given to the Trustee during such 60-day period by the Holders of a
         majority in principal amount of the Outstanding Securities;

it being understood and intended that no one or more Holders shall have any
right in any manner whatever by virtue of, or by availing of, any provision of
this Indenture to affect, disturb or prejudice the rights of any other Holders,
or to obtain or to seek to obtain priority or preference over any other Holders
or to enforce any right under this Indenture, except in the manner herein
provided and for the equal and ratable benefit of all the Holders.


SECTION 508. Unconditional Right of Holders to Receive Principal and Interest
and to Convert.

                  Notwithstanding any other provision in this Indenture, the
Holder of any Security shall have the right, which is absolute and
unconditional, to receive payment of the principal of and (subject to Section
307) interest on such Security on the respective Stated Maturities expressed in
such Security and to convert such Security in accordance with Article Twelve and
to institute suit for the enforcement of any such payment and right to convert,
and


                                      -37-
   48
such rights shall not be impaired without the consent of such Holder.


SECTION 509.  Restoration of Rights and Remedies.

                  If the Trustee or any Holder has instituted any proceeding to
enforce any right or remedy under this Indenture and such proceeding has been
discontinued or abandoned for any reason, or has been determined adversely to
the Trustee or to such Holder, then and in every such case, subject to any
determination in such proceeding, the Company, the Trustee and the Holders shall
be restored severally and respectively to their former positions hereunder and
thereafter all rights and remedies of the Trustee and the Holders shall continue
as though no such proceeding had been instituted.


SECTION 510.  Rights and Remedies Cumulative.

                  Except as otherwise provided with respect to the replacement
or payment of mutilated, destroyed, lost or stolen Securities in the last
paragraph of Section 306, no right or remedy herein conferred upon or reserved
to the Trustee or to the Holders is intended to be exclusive of any other right
or remedy, and every right and remedy shall, to the extent permitted by law, be
cumulative and in addition to every other right and remedy given hereunder or
now or hereafter existing at law or in equity or otherwise. The assertion or
employment of any right or remedy hereunder, or otherwise, shall not prevent the
concurrent assertion or employment of any other appropriate right or remedy.


SECTION 511. Delay or Omission Not Waiver.

                  No delay or omission of the Trustee or of any Holder of any
Security to exercise any right or remedy accruing upon any Event of Default
shall impair any such right or remedy or constitute a waiver of any such Event
of Default or an acquiescence therein. Every right and remedy given by this
Article or by law to the Trustee or to the Holders may be exercised from time to
time, and as often as may be deemed expedient, by the Trustee or by the Holders,
as the case may be.


SECTION 512.  Control by Holders.


                                      -38-
   49
                  The Holders of a majority in principal amount of the
Outstanding Securities shall have the right to direct the time, method and place
of conducting any proceeding for any remedy available to the Trustee or
exercising any trust or power conferred on the Trustee, provided that

                  (1) such direction shall not be in conflict with any rule of
         law or with this Indenture, and

                  (2) the Trustee may take any other action deemed proper by the
         Trustee which is not inconsistent with such direction.


SECTION 513.  Waiver of Past Defaults.

                  The Holders of not less than a majority in principal amount of
the Outstanding Securities may on behalf of the Holders of all the Securities
waive any past default hereunder and its consequences, except a default

                  (1) in the payment of the principal of or interest on any
         Security, or

                  (2) in respect of a covenant or provision hereof which under
         Article Nine cannot be modified or amended without the consent of the
         Holder of each Outstanding Security affected.

                  Upon any such waiver, such default shall cease to exist, and
any Event of Default arising therefrom shall be deemed to have been cured, for
every purpose of this Indenture; but no such waiver shall extend to any
subsequent or other default or impair any right consequent thereon.


SECTION 514.  Undertaking for Costs.

                  In any suit for the enforcement of any right or remedy under
this Indenture, or in any suit against the Trustee for any action taken,
suffered or omitted by it as Trustee, a court may require any party litigant in
such suit to file an undertaking to pay the costs of such suit, and may assess
costs against any such party litigant, in the manner and to the extent provided
in the Trust Indenture Act; provided, that neither this Section nor the Trust
Indenture Act shall be deemed to authorize any court to require such an
undertaking or to make such an assessment in any suit instituted by the Company
or in any suit for the


                                      -39-
   50
enforcement of the right to convert any Security in accordance with Article
Twelve.


SECTION 515.  Waiver of Stay or Extension Laws.

                  The Company covenants (to the extent that it may lawfully do
so) that it will not at any time insist upon, or plead, or in any manner
whatsoever claim or take the benefit or advantage of, any stay or extension law
wherever enacted, now or at any time hereafter in force, which may affect the
covenants or the performance of this Indenture; and the Company (to the extent
that it may lawfully do so) hereby expressly waives all benefit or advantage of
any such law and covenants that it will not hinder, delay or impede the
execution of any power herein granted to the Trustee, but will suffer and permit
the execution of every such power as though no such law had been enacted.



                                   ARTICLE SIX

                                   The Trustee


SECTION 601.  Certain Duties and Responsibilities.

                  The duties and responsibilities of the Trustee shall be as
provided by the Trust Indenture Act. Notwithstanding the foregoing, no provision
of this Indenture shall require the Trustee to expend or risk its own funds or
otherwise incur any financial liability in the performance of any of its duties
hereunder, or in the exercise of any of its rights or powers, if it shall have
reasonable grounds for believing that repayment of such funds or adequate
indemnity against such risk or liability is not reasonably assured to it.
Whether or not therein expressly so provided, every provision of this Indenture
relating to the conduct or affecting the liability of or affording protection to
the Trustee shall be subject to the provisions of this Section .


SECTION 602.  Notice of Defaults.

                  The Trustee shall give the Holders notice of any default
hereunder as and to the extent provided by the Trust Indenture Act; provided,
however, that in the case of any default of the character specified in Section
501(3), no


                                      -40-
   51
such notice to Holders shall be given until at least 30 days after the
occurrence thereof. For the purpose of this Section , the term "default" means
any event which is, or after notice or lapse of time or both would become, an
Event of Default.


SECTION 603.  Certain Rights of Trustee.

                  Subject to the provisions of Section 601:

                  (a) the Trustee may rely and shall be protected in acting or
         refraining from acting upon any resolution, certificate, statement,
         instrument, opinion, report, notice, request, direction, consent,
         order, bond, debenture, note, other evidence of indebtedness or other
         paper or document believed by it to be genuine and to have been signed
         or presented by the proper party or parties;

                  (b) any request or direction of the Company mentioned herein
         shall be sufficiently evidenced by a Company Request or Company Order
         and any resolution of the Board of Directors may be sufficiently
         evidenced by a Board Resolution;

                  (c) whenever in the administration of this Indenture the
         Trustee shall deem it desirable that a matter be proved or established
         prior to taking, suffering or omitting any action hereunder, the
         Trustee (unless other evidence be herein specifically prescribed) may,
         in the absence of bad faith on its part, rely upon an Officers'
         Certificate;

                  (d) the Trustee may consult with counsel and the written
         advice of such counsel or any Opinion of Counsel shall be full and
         complete authorization and protection in respect of any action taken,
         suffered or omitted by it hereunder in good faith and in reliance
         thereon;

                  (e) the Trustee shall be under no obligation to exercise any
         of the rights or powers vested in it by this Indenture at the request
         or direction of any of the Holders pursuant to this Indenture, unless
         such Holders shall have offered to the Trustee reasonable security or
         indemnity against the costs, expenses and liabilities which might be


                                      -41-
   52
         incurred by it in compliance with such request or direction;

                  (f) the Trustee shall not be bound to make any investigation
         into the facts or matters stated in any resolution, certificate,
         statement, instrument, opinion, report, notice, request, direction,
         consent, order, bond, debenture, note, other evidence of indebtedness
         or other paper or document, but the Trustee, in its discretion, may
         make such further inquiry or investigation into such facts or matters
         as it may see fit, and, if the Trustee shall determine to make such
         further inquiry or investigation, it shall be entitled to examine the
         books, records and premises of the Company, personally or by agent or
         attorney; and

                  (g) the Trustee may execute any of the trusts or powers
         hereunder or perform any duties hereunder either directly or by or
         through agents or attorneys and the Trustee shall not be responsible
         for any misconduct or negligence on the part of any agent or attorney
         appointed with due care by it hereunder.


SECTION 604. Not Responsible for Recitals or Issuance of Securities.

                  The recitals contained herein and in the Securities, except
the Trustee's certificates of authentication, shall be taken as the statements
of the Company, and the Trustee assumes no responsibility for their correctness.
The Trustee makes no representations as to the validity or sufficiency of this
Indenture or of the Securities. The Trustee shall not be accountable for the use
or application by the Company of Securities or the proceeds thereof.


SECTION 605.  May Hold Securities.

                  The Trustee, any Authenticating Agent, any Paying Agent, any
Security Registrar or any other agent of the Company, in its individual or any
other capacity, may become the owner or pledgee of Securities and, subject to
Sections 608 and 613, may otherwise deal with the Company with the same rights
it would have if it were not Trustee, Authenticating Agent, Paying Agent,
Security Registrar or such other agent.


                                      -42-
   53

SECTION 606.  Money Held in Trust.

                  Money held by the Trustee in trust hereunder need not be
segregated from other funds except to the extent required by law. The Trustee
shall be under no liability for interest on any money received by it hereunder
except as otherwise agreed with the Company.


SECTION 607.  Compensation and Reimbursement.

                  The Company agrees

                  (1) to pay to the Trustee from time to time reasonable
         compensation for all services rendered by it hereunder (which
         compensation shall not be limited by any provision of law in regard to
         the compensation of a trustee of an express trust);

                  (2) except as otherwise expressly provided herein, to
         reimburse the Trustee upon its request for all reasonable expenses,
         disbursements and advances incurred or made by the Trustee in
         accordance with any provision of this Indenture (including the
         reasonable compensation and the expenses and disbursements of its
         agents and counsel), except any such expense, disbursement or advance
         as may be attributable to its negligence or bad faith; and

                  (3) to indemnify the Trustee for, and to hold it harmless
         against, any loss, liability or expense incurred without negligence or
         bad faith on its part, arising out of or in connection with the
         acceptance or administration of this trust, including the costs and
         expenses of defending itself against any claim or liability in
         connection with the exercise or performance of any of its powers or
         duties hereunder.


SECTION 608.  Disqualification; Conflicting Interests.

                  If the Trustee has or shall acquire a conflicting interest
within the meaning of the Trust Indenture Act, the Trustee shall either
eliminate such interest or resign, to the extent and in the manner provided by,
and subject to the provisions of, the Trust Indenture Act and this Indenture.


                                      -43-
   54
SECTION 609.  Corporate Trustee Required; Eligibility.

                  There shall at all times be a Trustee hereunder which shall be
a Person that is eligible pursuant to the Trust Indenture Act to act as such and
has a combined capital and surplus of at least $50,000,000 and its Corporate
Trust Office in _________________________________________. If such Person
publishes reports of condition at least annually, pursuant to law or to the
requirements of said supervising or examining authority, then for the purposes
of this Section , the combined capital and surplus of such Person shall be
deemed to be its combined capital and surplus as set forth in its most recent
report of condition so published. If at any time the Trustee shall cease to be
eligible in accordance with the provisions of this Section , it shall resign
immediately in the manner and with the effect hereinafter specified in this
Article.


SECTION 610. Resignation and Removal; Appointment of Successor.

                  (a) No resignation or removal of the Trustee and no
appointment of a successor Trustee pursuant to this Article shall become
effective until the acceptance of appointment by the successor Trustee under
Section 611.

                  (b) The Trustee may resign at any time by giving written
notice thereof to the Company. If an instrument of acceptance by a successor
Trustee shall not have been delivered to the Trustee within 30 days after the
giving of such notice of resignation, the resigning Trustee may petition any
court of competent jurisdiction for the appointment of a successor Trustee.

                  (c) The Trustee may be removed at any time by Act of the
Holders of a majority in principal amount of the Outstanding Securities,
delivered to the Trustee and to the Company.

                  (d)  If at any time:

                  (1) the Trustee shall fail to comply with Section 608 after
         written request therefor by the Company or by any Holder who has been a
         bona fide Holder of a Security for at least six months, or

                  (2) the Trustee shall cease to be eligible under Section 609
         and shall fail to resign after


                                      -44-
   55
         written request therefor by the Company or by any such Holder, or

                  (3) the Trustee shall become incapable of acting or shall be
         adjudged a bankrupt or insolvent or a receiver of the Trustee or of its
         property shall be appointed or any public officer shall take charge or
         control of the Trustee or of its property or affairs for the purpose of
         rehabilitation, conservation or liquidation,

then, in any such case, (i) the Company by a Board Resolution may remove the
Trustee, or (ii) subject to Section 514, any Holder who has been a bona fide
Holder of a Security for at least six months may, on behalf of himself and all
others similarly situated, petition any court of competent jurisdiction for the
removal of the Trustee and the appointment of a successor Trustee.

                  (e) If the Trustee shall resign, be removed or become
incapable of acting, or if a vacancy shall occur in the office of Trustee for
any cause, the Company, by a Board Resolution, shall promptly appoint a
successor Trustee. If, within one year after such resignation, removal or
incapability, or the occurrence of such vacancy, a successor Trustee shall be
appointed by Act of the Holders of a majority in principal amount of the
Outstanding Securities delivered to the Company and the retiring Trustee, the
successor Trustee so appointed shall, forthwith upon its acceptance of such
appointment, become the successor Trustee and supersede the successor Trustee
appointed by the Company. If no successor Trustee shall have been so appointed
by the Company or the Holders and accepted appointment in the manner hereinafter
provided, any Holder who has been a bona fide Holder of a Security for at least
six months may, on behalf of himself and all others similarly situated, petition
any court of competent jurisdiction for the appointment of a successor Trustee.

                  (f) The Company shall give notice of each resignation and each
removal of the Trustee and each appointment of a successor Trustee to all
Holders in the manner provided in Section 106. Each notice shall include the
name of the successor Trustee and the address of its Corporate Trust Office.


                                      -45-
   56
SECTION 611.  Acceptance of Appointment by Successor.

                  Every successor Trustee appointed hereunder shall execute,
acknowledge and deliver to the Company and to the retiring Trustee an instrument
accepting such appointment, and thereupon the resignation or removal of the
retiring Trustee shall become effective and such successor Trustee, without any
further act, deed or conveyance, shall become vested with all the rights,
powers, trusts and duties of the retiring Trustee; but, on request of the
Company or the successor Trustee, such retiring Trustee shall, upon payment of
its charges, execute and deliver an instrument transferring to such successor
Trustee all the rights, powers and trusts of the retiring Trustee and shall duly
assign, transfer and deliver to such successor Trustee all property and money
held by such retiring Trustee hereunder. Upon request of any such successor
Trustee, the Company shall execute any and all instruments for more fully and
certainly vesting in and confirming to such successor Trustee all such rights,
powers and trusts.

                  No successor Trustee shall accept its appointment unless at
the time of such acceptance such successor Trustee shall be qualified and
eligible under this Article.


SECTION 612.      Merger, Conversion, Consolidation or Succession to Business.

                  Any corporation into which the Trustee may be merged or
converted or with which it may be consolidated, or any corporation resulting
from any merger, conversion or consolidation to which the Trustee shall be a
party, or any corporation succeeding to all or substantially all the corporate
trust business of the Trustee, shall be the successor of the Trustee hereunder,
provided such corporation shall be otherwise qualified and eligible under this
Article, without the execution or filing of any paper or any further act on the
part of any of the parties hereto. In case any Securities shall have been
authenticated, but not delivered, by the Trustee then in office, any successor
by merger, conversion or consolidation to such authenticating Trustee may adopt
such authentication and deliver the Securities so authenticated with the same
effect as if such successor Trustee had itself authenticated such Securities.


                                      -46-
   57
SECTION 613. Preferential Collection of Claims Against Company.

                  If and when the Trustee shall be or become a creditor of the
Company (or any other obligor upon the Securities), the Trustee shall be subject
to the provisions of the Trust Indenture Act regarding the collection of claims
against the Company (or any such other obligor).


SECTION 614. Appointment of Authenticating Agent.

                  The Trustee may appoint an Authenticating Agent or Agents
which shall be authorized to act on behalf of the Trustee to authenticate
Securities issued upon original issue and upon exchange, registration of
transfer or pursuant to Section 306, and Securities so authenticated shall be
entitled to the benefits of this Indenture and shall be valid and obligatory for
all purposes as if authenticated by the Trustee hereunder. Wherever reference is
made in this Indenture to the authentication and delivery of Securities by the
Trustee or the Trustee's certificate of authentication, such reference shall be
deemed to include authentication and delivery on behalf of the Trustee by an
Authenticating Agent and a certificate of authentication executed on behalf of
the Trustee by an Authenticating Agent. Each Authenticating Agent shall be
acceptable to the Company and shall at all times be a corporation organized and
doing business under the laws of the United States of America, any State thereof
or the District of Columbia, authorized under such laws to act as Authenticating
Agent, having a combined capital and surplus of not less than $50,000,000 and
subject to supervision or examination by Federal or State authority. If such
Authenticating Agent publishes reports of condition at least annually, pursuant
to law or to the requirements of said supervising or examining authority, then
for the purposes of this Section , the combined capital and surplus of such
Authenticating Agent shall be deemed to be its combined capital and surplus as
set forth in its most recent report of condition so published. If at any time an
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section , such Authenticating Agent shall resign immediately
in the manner and with the effect specified in this Section .

                  Any corporation into which an Authenticating Agent may be
merged or converted or with which it may be consolidated, or any corporation
resulting from any merger, conversion or consolidation to which such
Authenticating Agent shall be a party, or any corporation succeeding to the


                                      -47-
   58
corporate agency or corporate trust business of an Authenticating Agent, shall
continue to be an Authenticating Agent, provided such corporation shall be
otherwise eligible under this Section , without the execution or filing of any
paper or any further act on the part of the Trustee or the Authenticating Agent.

                  An Authenticating Agent may resign at any time by giving
written notice thereof to the Trustee and to the Company. The Trustee may at any
time terminate the agency of an Authenticating Agent by giving written notice
thereof to such Authenticating Agent and to the Company. Upon receiving such a
notice of resignation or upon such a termination, or in case at any time such
Authenticating Agent shall cease to be eligible in accordance with the
provisions of this Section , the Trustee may appoint a successor Authenticating
Agent which shall be acceptable to the Company and shall mail written notice of
such appointment by first-class mail, postage prepaid, to all Holders as their
names and addresses appear in the Security Register. Any successor
Authenticating Agent upon acceptance of its appointment hereunder shall become
vested with all the rights, powers and duties of its predecessor hereunder, with
like effect as if originally named as an Authenticating Agent. No successor
Authenticating Agent shall be appointed unless eligible under the provisions of
this Section .

                  The Trustee agrees to pay to each Authenticating Agent from
time to time reasonable compensation for its services under this Section , and
the Trustee shall be entitled to be reimbursed for such payments, subject to the
provisions of Section 607.

                  If an appointment is made pursuant to this Section , the
Securities may have endorsed thereon, in addition to the Trustee's certificate
of authentication, an alternative certificate of authentication in the following
form:

                  This is one of the Securities described in the
within-mentioned Indenture.



                                                  -----------------------------,
                                                                      As Trustee


                                      -48-
   59
                                                  By___________________________,
                                                         As Authenticating Agent



                                                   By___________________________
                                                              Authorized Officer




                                  ARTICLE SEVEN

                Holders' Lists and Reports by Trustee and Company


SECTION 701. Company to Furnish Trustee Names and Addresses of Holders.

                  The Company will furnish or cause to be furnished to the
         Trustee

                  (a) semi-annually, not more than 15 days after each Regular
         Record Date, a list, in such form as the Trustee may reasonably
         require, of the names and addresses of the Holders as of such Regular
         Record Date, and

                  (b) at such other times as the Trustee may request in writing,
         within 30 days after the receipt by the Company of any such request, a
         list of similar form and content as of a date not more than 15 days
         prior to the time such list is furnished;

excluding from any such list names and addresses received by the Trustee in its
capacity as Security Registrar.


SECTION 702. Preservation of Information; Communications to Holders.

                  (a) The Trustee shall preserve, in as current a form as is
reasonably practicable, the names and addresses of Holders contained in the most
recent list furnished to the Trustee as provided in Section 701 and the names
and addresses of Holders received by the Trustee in its capacity as Security
Registrar. The Trustee may destroy any list furnished to it as provided in
Section 701 upon receipt of a new list so furnished.


                                      -49-
   60
                  (b) The rights of Holders to communicate with other Holders
with respect to their rights under this Indenture or under the Securities, and
the corresponding rights and duties of the Trustee, shall be as provided by the
Trust Indenture Act.

                  (c) Every Holder of Securities, by receiving and holding the
same, agrees with the Company and the Trustee that neither the Company nor the
Trustee nor any agent of either of them shall be held accountable by reason of
any disclosure of information as to names and addresses of Holders made pursuant
to the Trust Indenture Act.


SECTION 703. Reports by Trustee.

                  (a) The Trustee shall transmit to Holders such reports
concerning the Trustee and its actions under this Indenture as may be required
pursuant to the Trust Indenture Act at the times and in the manner provided
pursuant thereto.

                  (b) A copy of each such report shall, at the time of such
transmission to Holders, be filed by the Trustee with each stock exchange upon
which the Securities are listed, with the Commission and with the Company. The
Company will notify the Trustee when the Securities are listed on any stock
exchange.


SECTION 704. Reports by Company.

                  The Company shall file with the Trustee and the Commission,
and transmit to Holders, such information, documents and other reports, and such
summaries thereof, as may be required pursuant to the Trust Indenture Act at the
times and in the manner provided pursuant to such Act; provided that any such
information, documents or reports required to be filed with the Commission
pursuant to Section 13 or 15(d) of the Securities Exchange Act of 1934 shall be
filed with the Trustee within 15 days after the same is so required to be filed
with the Commission.


                                      -50-
   61
                                  ARTICLE EIGHT

              Consolidation, Merger, Conveyance, Transfer or Lease


SECTION 801. Company May Consolidate, Etc., Only on Certain Terms.

                  The Company shall not consolidate with or merge into any other
Person or convey, transfer or lease its properties and assets substantially as
an entirety to any Person, and the Company shall not permit any Person to
consolidate with or merge into the Company or convey, transfer or lease its
properties and assets substantially as an entirety to the Company, unless:

                  (1) in case the Company shall consolidate with or merge into
         another Person or convey, transfer or lease its properties and assets
         substantially as an entirety to any Person, the Person formed by such
         consolidation or into which the Company is merged or the Person which
         acquires by conveyance or transfer, or which leases, the properties and
         assets of the Company substantially as an entirety shall be a
         corporation, partnership or trust, shall be organized and validly
         existing under the laws of the United States of America, any State
         thereof or the District of Columbia and shall expressly assume, by an
         indenture supplemental hereto, executed and delivered to the Trustee,
         in form satisfactory to the Trustee, the due and punctual payment of
         the principal of and interest on all the Securities and the performance
         or observance of every covenant of this Indenture on the part of the
         Company to be performed or observed and shall have provided for
         conversion rights in accordance with Section 1201;

                  (2) immediately after giving effect to such transaction, no
         Event of Default, and no event which, after notice or lapse of time or
         both, would become an Event of Default, shall have happened and be
         continuing; and

                  (3) the Company has delivered to the Trustee an Officers'
         Certificate and an Opinion of Counsel, each stating that such
         consolidation, merger, conveyance, transfer or lease and, if a
         supplemental indenture is required in connection with such transaction,
         such supplemental indenture


                                      -51-
   62
         comply with this Article and that all conditions precedent herein
         provided for relating to such transaction have been complied with.


SECTION 802. Successor Substituted.

                  Upon any consolidation of the Company with, or merger of the
Company into, any other Person or any conveyance, transfer or lease of the
properties and assets of the Company substantially as an entirety in accordance
with Section 801, the successor Person formed by such consolidation or into
which the Company is merged or to which such conveyance, transfer or lease is
made shall succeed to, and be substituted for, and may exercise every right and
power of, the Company under this Indenture with the same effect as if such
successor Person had been named as the Company herein, and thereafter, except in
the case of a lease, the predecessor Person shall be relieved of all obligations
and covenants under this Indenture and the Securities.



                                  ARTICLE NINE

                             Supplemental Indentures


SECTION 901. Supplemental Indentures Without Consent of Holders.

                  Without the consent of any Holders, the Company, when
authorized by a Board Resolution, and the Trustee, at any time and from time to
time, may enter into one or more indentures supplemental hereto, in form
satisfactory to the Trustee, for any of the following purposes:

                  (1) to evidence the succession of another Person to the
         Company and the assumption by any such successor of the covenants of
         the Company herein and in the Securities; or

                  (2) to add to the covenants of the Company for the benefit of
         the Holders, or to surrender any right or power herein conferred upon
         the Company; or

                  (3) to secure the Securities pursuant to the requirements of
         Section 1003 or otherwise; or


                                      -52-
   63
                  (4) to cure any ambiguity, to correct or supplement any
         provision herein which may be inconsistent with any other provision
         herein, or to make any other provisions with respect to matters or
         questions arising under this Indenture which shall not be inconsistent
         with the provisions of this Indenture, provided that such action
         pursuant to this Clause (4) shall not adversely affect the interests of
         the Holders in any material respect.


SECTION 902. Supplemental Indentures with Consent of Holders.

                  With the consent of the Holders of not less than 66 2/3% in
principal amount of the Outstanding Securities, by Act of said Holders delivered
to the Company and the Trustee, the Company, when authorized by a Board
Resolution, and the Trustee may enter into an indenture or indentures
supplemental hereto for the purpose of adding any provisions to or changing in
any manner or eliminating any of the provisions of this Indenture or of
modifying in any manner the rights of the Holders under this Indenture;
provided, however, that no such supplemental indenture shall, without the
consent of the Holder of each Outstanding Security affected thereby,

                  (1) change the Stated Maturity of the principal of, or any
         instalment of interest on, any Security, or reduce the principal amount
         thereof or the rate of interest thereon, or change the place of payment
         where, or the coin or currency in which, any Security or interest
         thereon is payable, or impair the right to institute suit for the
         enforcement of any such payment on or after the Stated Maturity
         thereof, or adversely affect the right to convert any Security as
         provided in Article Twelve, or modify the provisions of this Indenture
         with respect to the subordination of the Securities in a manner adverse
         to the Holders, or

                  (2) reduce the percentage in principal amount of the
         Outstanding Securities, the consent of whose Holders is required for
         any such supplemental indenture, or the consent of whose Holders is
         required for any waiver (of compliance with certain provisions of this
         Indenture or


                                      -53-
   64
         certain defaults hereunder and their consequences) provided for in this
         Indenture, or

                  (3) modify any of the provisions of this Section or Section
         513, except to increase any such percentage or to provide that certain
         other provisions of this Indenture cannot be modified or waived without
         the consent of the Holder of each Outstanding Security affected
         thereby.

                  It shall not be necessary for any Act of Holders under this
Section to approve the particular form of any proposed supplemental indenture,
but it shall be sufficient if such Act shall approve the substance thereof.


SECTION 903. Execution of Supplemental Indentures.

                  In executing, or accepting the additional trusts created by,
any supplemental indenture permitted by this Article or the modifications
thereby of the trusts created by this Indenture, the Trustee shall be entitled
to receive, and (subject to Section 601) shall be fully protected in relying
upon, an Opinion of Counsel stating that the execution of such supplemental
indenture is authorized or permitted by this Indenture. The Trustee may, but
shall not be obligated to, enter into any such supplemental indenture which
affects the Trustee's own rights, duties or immunities under this Indenture or
otherwise.


SECTION 904. Effect of Supplemental Indentures.

                  Upon the execution of any supplemental indenture under this
Article, this Indenture shall be modified in accordance therewith, and such
supplemental indenture shall form a part of this Indenture for all purposes; and
every Holder of Securities theretofore or thereafter authenticated and delivered
hereunder shall be bound thereby.


SECTION 905. Conformity with Trust Indenture Act.

                  Every supplemental indenture executed pursuant to this Article
shall conform to the requirements of the Trust Indenture Act.


                                      -54-
   65
SECTION 906. Reference in Securities to Supplemental Indentures.

                  Securities authenticated and delivered after the execution of
any supplemental indenture pursuant to this Article may, and shall if required
by the Trustee, bear a notation in form approved by the Trustee as to any matter
provided for in such supplemental indenture. If the Company shall so determine,
new Securities so modified as to conform, in the opinion of the Trustee and the
Company, to any such supplemental indenture may be prepared and executed by the
Company and authenticated and delivered by the Trustee in exchange for
Outstanding Securities.



                                   ARTICLE TEN

                                    Covenants


SECTION 1001. Payment of Principal and Interest.

                  The Company will duly and punctually pay the principal of and
interest on the Securities in accordance with the terms of the Securities and
this Indenture.


SECTION 1002.     Maintenance of Office or Agency.

                  The Company will maintain in the Borough of Manhattan, the
City of New York, New York an office or agency where Securities may be presented
or surrendered for payment, where Securities may be surrendered for registration
of transfer or exchange, where Securities may be surrendered for conversion and
where notices and demands to or upon the Company in respect of the Securities
and this Indenture may be served. The Company will give prompt written notice to
the Trustee of the location, and any change in the location, of such office or
agency. If at any time the Company shall fail to maintain any such required
office or agency or shall fail to furnish the Trustee with the address thereof,
such presentations, surrenders, notices and demands may be made or served at the
Corporate Trust Office of the Trustee, and the Company hereby appoints the
Trustee as its agent to receive all such presentations, surrenders, notices and
demands.

                  The Company may also from time to time designate one or more
other offices or agencies (in or outside the


                                      -55-
   66
Borough of Manhattan, the City of New York, New York) where the Securities may
be presented or surrendered for any or all such purposes and may from time to
time rescind such designations; provided, however, that no such designation or
rescission shall in any manner relieve the Company of its obligation to maintain
an office or agency in the Borough of Manhattan, the City of New York, New York
for such purposes. The Company will give prompt written notice to the Trustee of
any such designation or rescission and of any change in the location of any such
other office or agency.


SECTION 1003. Money for Security Payments to Be Held in Trust.

                  If the Company shall at any time act as its own Paying Agent,
it will, on or before each due date of the principal of or interest on any of
the Securities, segregate and hold in trust for the benefit of the Persons
entitled thereto a sum sufficient to pay the principal or interest so becoming
due until such sums shall be paid to such Persons or otherwise disposed of as
herein provided and will promptly notify the Trustee of its action or failure so
to act.

                  Whenever the Company shall have one or more Paying Agents, it
will, prior to each due date of the principal of or interest on any Securities,
deposit with a Paying Agent a sum sufficient to pay such amount, such sum to be
held as provided by the Trust Indenture Act, and (unless such Paying Agent is
the Trustee) the Company will promptly notify the Trustee of its action or
failure so to act.

                  The Company will cause each Paying Agent other than the
Trustee to execute and deliver to the Trustee an instrument in which such Paying
Agent shall agree with the Trustee, subject to the provisions of this Section ,
that such Paying Agent will (i) comply with the provisions of the Trust
Indenture Act applicable to it as a Paying Agent and (ii) during the continuance
of any default by the Company (or any other obligor upon the Securities) in the
making of any payment in respect of the Securities, upon the written request of
the Trustee, forthwith pay to the Trustee all sums held in trust by such Paying
Agent as such.

                  The Company may at any time, for the purpose of obtaining the
satisfaction and discharge of this Indenture or for any other purpose, pay, or
by Company Order direct any Paying Agent to pay, to the Trustee all sums held in
trust by the Company or such Paying Agent, such sums to be


                                      -56-
   67
held by the Trustee upon the same trusts as those upon which such sums were held
by the Company or such Paying Agent; and, upon such payment by any Paying Agent
to the Trustee, such Paying Agent shall be released from all further liability
with respect to such money.

                  Any money deposited with the Trustee or any Paying Agent, or
then held by the Company, in trust for the payment of the principal of or
interest on any Security and remaining unclaimed for two years after such
principal or interest has become due and payable shall be paid to the Company on
Company Request, or (if then held by the Company) shall be discharged from such
trust; and the Holder of such Security shall thereafter, as an unsecured general
creditor, look only to the Company for payment thereof, and all liability of the
Trustee or such Paying Agent with respect to such trust money, and all liability
of the Company as trustee thereof, shall thereupon cease; provided, however,
that the Trustee or such Paying Agent, before being required to make any such
repayment, may at the expense of the Company cause to be published once, in a
newspaper published in the English language, customarily published on each
Business Day and of general circulation in the Borough of Manhattan, the City of
New York, New York, notice that such money remains unclaimed and that, after a
date specified therein, which shall not be less than 30 days from the date of
such publication, any unclaimed balance of such money then remaining will be
repaid to the Company.


SECTION 1004. Statement by Officers as to Default.

                  The Company will deliver to the Trustee, within 120 days after
the end of each fiscal year of the Company ending after the date hereof, an
Officers' Certificate, stating whether or not to the best knowledge of the
signers thereof the Company is in default in the performance and observance of
any of the terms, provisions and conditions of this Indenture (without regard to
any period of grace or requirement of notice provided hereunder) and, if the
Company shall be in default, specifying all such defaults and the nature and
status thereof of which they may have knowledge.


                                      -57-
   68
SECTION 1005. Existence.

                  Subject to Article Eight, the Company will do or cause to be
done all things necessary to preserve and keep in full force and effect its
existence, rights (charter and statutory) and franchises; provided, however,
that the Company shall not be required to preserve any such right or franchise
if the Board of Directors shall determine that the preservation thereof is no
longer desirable in the conduct of the business of the Company and that the loss
thereof is not disadvantageous in any material respect to the Holders.



                                 ARTICLE ELEVEN

                           Subordination of Securities

SECTION 1101. Securities Subordinate to Senior Indebtedness.

                  The Company covenants and agrees, and each Holder of a
Security, by his acceptance thereof, likewise covenants and agrees, that, to the
extent and in the manner hereinafter set forth in this Article, the indebtedness
represented by the Securities and the payment of the principal of and interest
on each and all of the Securities are hereby expressly made subordinate and
subject in right of payment to the prior payment in full of all Senior
Indebtedness.


SECTION 1102. Payment Over of Proceeds Upon Dissolution, Etc.

                  In the event of (a) any insolvency or bankruptcy case or
proceeding, or any receivership, liquidation, reorganization or other similar
case or proceeding in connection therewith, relative to the Company or to its
creditors, as such, or to its assets, or (b) any liquidation, dissolution or
other winding up of the Company, whether voluntary or involuntary and whether or
not involving insolvency or bankruptcy, or (c) any assignment for the benefit of
creditors or any other marshalling of assets and liabilities of the Company,
then and in any such event the holders of Senior Indebtedness shall be entitled
to receive payment in full of all amounts due or to become due on or in respect
of all Senior Indebtedness, or provision shall be made for such payment in cash,
before the Holders of the Securities are entitled to receive any


                                      -58-
   69
payment on account of principal of or interest on the Securities, and to that
end the holders of Senior Indebtedness shall be entitled to receive, for
application to the payment thereof, any payment or distribution of any kind or
character, whether in cash, property or securities, which may be payable or
deliverable in respect of the Securities in any such case, proceeding,
dissolution, liquidation or other winding up or event.

                  In the event that, notwithstanding the foregoing provisions of
this Section , the Trustee or the Holder of any Security shall have received any
payment or distribution of assets of the Company of any kind or character,
whether in cash, property or securities, before all Senior Indebtedness is paid
in full or payment thereof provided for, and if such fact shall, at or prior to
the time of such payment or distribution, have been made known to the Trustee
or, as the case may be, such Holder, then and in such event such payment or
distribution shall be paid over or delivered forthwith to the trustee in
bankruptcy, receiver, liquidating trustee, custodian, assignee, agent or other
Person making payment or distribution of assets of the Company for application
to the payment of all Senior Indebtedness remaining unpaid, to the extent
necessary to pay all Senior Indebtedness in full, after giving effect to any
concurrent payment or distribution to or for the holders of Senior Indebtedness.

                  For purposes of this Article only, the words "cash, property
or securities" shall not be deemed to include shares of the Company as
reorganized or readjusted, or securities of the Company or any other corporation
provided for by a plan of reorganization or readjustment which are subordinated
in right of payment to all Senior Indebtedness which may at the time be
outstanding to substantially the same extent as, or to a greater extent than,
the Securities are so subordinated as provided in this Article. The
consolidation of the Company with, or the merger of the Company into, another
Person or the liquidation or dissolution of the Company following the conveyance
or transfer of its properties and assets substantially as an entirety to another
Person upon the terms and conditions set forth in Article Eight shall not be
deemed a dissolution, winding up, liquidation, reorganization, assignment for
the benefit of creditors or marshalling of assets and liabilities of the Company
for the purposes of this Section if the Person formed by such consolidation or
into which the Company is merged or which acquires by conveyance or transfer
such properties and assets substantially as an entirety, as the case may be,


                                      -59-
   70
shall, as a part of such consolidation, merger, conveyance or transfer, comply
with the conditions set forth in Article Eight.


SECTION 1103. Prior Payment to Senior Indebtedness Upon Acceleration of
Securities.

                  In the event that any Securities are declared due and payable
before their Stated Maturity, then and in such event the holders of the Senior
Indebtedness outstanding at the time such Securities so become due and payable
shall be entitled to receive payment in full of all amounts due or to become due
on or in respect of all Senior Indebtedness, or provision shall be made for such
payment in cash, before the Holders of the Securities are entitled to receive
any payment [(including any payment which may be payable by reason of the
payment of any other indebtedness of the Company being subordinated to the
payment of the Securities)](*) by the Company on account of the principal of or
interest on the Securities or on account of the purchase or other acquisition of
Securities.

                  In the event that, notwithstanding the foregoing, the Company
shall make any payment to the Trustee or the Holder of any Security prohibited
by the foregoing provisions of this Section , and if such fact shall, at or
prior to the time of such payment, have been made known to the Trustee or, as
the case may be, such Holder, then and in such event such payment shall be paid
over and delivered forthwith to the Company.

                  The provisions of this Section shall not apply to any payment
with respect to which Section 1102 would be applicable.


SECTION 1104. No Payment When Senior Indebtedness in Default.

                  (a) In the event and during the continuation of any default in
the payment of principal of or interest on any Senior Indebtedness beyond any
applicable grace period with respect thereto, or in the event that any event of
default with respect to any Senior Indebtedness shall have

*        This provision should be included if the Company may have a class or
         classes of debt which are subordinated to the Securities.


                                      -60-
   71
occurred and be continuing permitting the holders of such Senior Indebtedness
(or a trustee on behalf of the holders thereof) to declare such Senior
Indebtedness due and payable prior to the date on which it would otherwise have
become due and payable, unless and until such event of default shall have been
cured or waived or shall have ceased to exist and such acceleration shall have
been rescinded or annulled, or (b) in the event any judicial proceeding shall be
pending with respect to any such default in payment or event of default, then no
payment shall be made by the Company on account of principal of or interest on
the Securities or on account of the purchase or other acquisition of Securities.

                  In the event that, notwithstanding the foregoing, the Company
shall make any payment to the Trustee or the Holder of any Security prohibited
by the foregoing provisions of this Section , and if such fact shall, at or
prior to the time of such payment, have been made known to the Trustee or, as
the case may be, such Holder, then and in such event such payment shall be paid
over and delivered forthwith to the Company.

                  The provisions of this Section shall not apply to any payment
with respect to which Section 1102 would be applicable.


SECTION 1105. Payment Permitted If No Default.

                  Nothing contained in this Article or elsewhere in this
Indenture or in any of the Securities shall prevent [(a)] the Company, at any
time except during the pendency of any case, proceeding, dissolution,
liquidation or other winding up, assignment for the benefit of creditors or
other marshalling of assets and liabilities of the Company referred to in
Section 1102 or under the conditions described in Section 1103 or 1104, from
making payments at any time of principal of or interest on the Securities [, or
(b) the application by the Trustee of any money deposited with it hereunder to
the payment of or on account of the principal of or interest on the Securities
or the retention of such payment by the Holders, if, at the time of such
application by the Trustee, it did not have knowledge that such payment would
have been prohibited by the provisions of this Article].


                                      -61-
   72
SECTION 1106. Subrogation to Rights of Holders of Senior Indebtedness.

                  Subject to the payment in full of all Senior Indebtedness, the
Holders of the Securities shall be subrogated to the extent of the payments or
distributions made to the holders of such Senior Indebtedness pursuant to the
provisions of this Article to the rights of the holders of such Senior
Indebtedness to receive payments and distributions of cash, property and
securities applicable to the Senior Indebtedness until the principal of and
interest on the Securities shall be paid in full. For purposes of such
subrogation, no payments or distributions to the holders of the Senior
Indebtedness of any cash, property or securities to which the Holders of the
Securities or the Trustee would be entitled except for the provisions of this
Article, and no payments pursuant to the provisions of this Article to the
holders of Senior Indebtedness by Holders of the Securities or the Trustee,
shall, as among the Company, its creditors other than holders of Senior
Indebtedness and the Holders of the Securities, be deemed to be a payment or
distribution by the Company to or on account of the Senior Indebtedness.


SECTION 1107. Provisions Solely to Define Relative Rights.

                  The provisions of this Article are and are intended solely for
the purpose of defining the relative rights of the Holders of the Securities on
the one hand and the holders of Senior Indebtedness on the other hand. Nothing
contained in this Article or elsewhere in this Indenture or in the Securities is
intended to or shall (a) impair, as among the Company, its creditors other than
holders of Senior Indebtedness and the Holders of the Securities, the obligation
of the Company, which is absolute and unconditional (and which, subject to the
rights under this Article of the holders of Senior Indebtedness, is intended to
rank equally with all other general obligations of the Company), to pay to the
Holders of the Securities the principal of and interest on the Securities as and
when the same shall become due and payable in accordance with their terms; or
(b) affect the relative rights against the Company of the Holders of the
Securities and creditors of the Company other than the holders of Senior
Indebtedness; or (c) prevent the Trustee or the Holder of any Security from
exercising all remedies otherwise permitted by applicable law upon default under
this Indenture, subject to the rights, if any, under this Article of the holders
of Senior Indebtedness to receive cash, property and securities


                                      -62-
   73
otherwise payable or deliverable to the Trustee or such Holder.


SECTION 1108. Trustee to Effectuate Subordination.

                  Each holder of a Security by his acceptance thereof authorizes
and directs the Trustee on his behalf to take such action as may be necessary or
appropriate to effectuate the subordination provided in this Article and
appoints the Trustee his attorney-in-fact for any and all such purposes.


SECTION 1109. No Waiver of Subordination Provisions.

                  No right of any present or future holder of any Senior
Indebtedness to enforce subordination as herein provided shall at any time in
any way be prejudiced or impaired by any act or failure to act on the part of
the Company or by any act or failure to act, in good faith, by any such holder,
or by any non-compliance by the Company with the terms, provisions and covenants
of this Indenture, regardless of any knowledge thereof any such holder may have
or be otherwise charged with.

                  Without in any way limiting the generality of the foregoing
paragraph, the holders of Senior Indebtedness may, at any time and from time to
time, without the consent of or notice to the Trustee or the Holders of the
Securities, without incurring responsibility to the Holders of the Securities
and without impairing or releasing the subordination provided in this Article or
the obligations hereunder of the Holders of the Securities to the holders of
Senior Indebtedness, do any one or more of the following: (i) change the manner,
place or terms of payment or extend the time of payment of, or renew or alter,
Senior Indebtedness, or otherwise amend or supplement in any manner Senior
Indebtedness or any instrument evidencing the same or any agreement under which
Senior Indebtedness is outstanding; (ii) sell, exchange, release or otherwise
deal with any property pledged, mortgaged or otherwise securing Senior
Indebtedness; (iii) release any Person liable in any manner for the collection
of Senior Indebtedness; and (iv) exercise or refrain from exercising any rights
against the Company and any other Person.


                                      -63-
   74
SECTION 1110. Notice to Trustee.

                  The Company shall give prompt written notice to the Trustee of
any fact known to the Company which would prohibit the making of any payment to
or by the Trustee in respect of the Securities. Notwithstanding the provisions
of this Article or any other provision of this Indenture, the Trustee shall not
be charged with knowledge of the existence of any facts which would prohibit the
making of any payment to or by the Trustee in respect of the Securities, unless
and until the Trustee shall have received written notice thereof from the
Company or a holder of Senior Indebtedness or from any trustee therefor; and,
prior to the receipt of any such written notice, the Trustee, subject to the
provisions of Section 601, shall be entitled in all respects to assume that no
such facts exist [; provided, however, that if the Trustee shall not have
received the notice provided for in this Section at least [to be discussed with
the Trustee] Business Days prior to the date upon which by the terms hereof any
money may become payable for any purpose (including, without limitation, the
payment of the principal of or interest on any Security), then, anything herein
contained to the contrary notwithstanding, the Trustee shall have full power and
authority to receive such money and to apply the same to the purpose for which
such money was received and shall not be affected by any notice to the contrary
which may be received by it within [to be discussed with the Trustee] Business
Days prior to such date].

                  Subject to the provisions of Section 601, the Trustee shall be
entitled to rely on the delivery to it of a written notice by a Person
representing himself to be a holder of Senior Indebtedness (or a trustee
therefor) to establish that such notice has been given by a holder of Senior
Indebtedness (or a trustee therefor). In the event that the Trustee determines
in good faith that further evidence is required with respect to the right of any
Person as a holder of Senior Indebtedness to participate in any payment or
distribution pursuant to this Article, the Trustee may request such Person to
furnish evidence to the reasonable satisfaction of the Trustee as to the amount
of Senior Indebtedness held by such Person, the extent to which such Person is
entitled to participate in such payment or distribution and any other facts
pertinent to the rights of such Person under this Article, and if such evidence
is not furnished, the Trustee may defer any payment to such Person pending
judicial determination as to the right of such Person to receive such payment.


                                      -64-
   75
SECTION 1111. Reliance on Judicial Order or Certificate of Liquidating Agent.

                  Upon any payment or distribution of assets of the Company
referred to in this Article, the Trustee, subject to the provisions of Section
601, and the Holders of the Securities shall be entitled to rely upon any order
or decree entered by any court of competent jurisdiction in which such
insolvency, bankruptcy, receivership, liquidation, reorganization, dissolution,
winding up or similar case or proceeding is pending, or a certificate of the
trustee in bankruptcy, receiver, liquidating trustee, custodian, assignee for
the benefit of creditors, agent or other Person making such payment or
distribution, delivered to the Trustee or to the Holders of Securities, for the
purpose of ascertaining the Persons entitled to participate in such payment or
distribution, the holders of the Senior Indebtedness and other indebtedness of
the Company, the amount thereof or payable thereon, the amount or amounts paid
or distributed thereon and all other facts pertinent thereto or to this Article.


SECTION 1112. Trustee Not Fiduciary for Holders of Senior Indebtedness.

                  The Trustee shall not be deemed to owe any fiduciary duty to
the holders of Senior Indebtedness and shall not be liable to any such holders
if it shall in good faith mistakenly pay over or distribute to Holders of
Securities or to the Company or to any other Person cash, property or securities
to which any holders of Senior Indebtedness shall be entitled by virtue of this
Article or otherwise.


SECTION 1113. Rights of Trustee as Holder of Senior Indebtedness; Preservation
of Trustee's Rights.

                  The Trustee in its individual capacity shall be entitled to
all the rights set forth in this Article with respect to any Senior Indebtedness
which may at any time be held by it, to the same extent as any other holder of
Senior Indebtedness, and nothing in this Indenture shall deprive the Trustee of
any of its rights as such holder.


                                      -65-
   76
                  Nothing in this Article shall apply to claims of, or payments
to, the Trustee under or pursuant to Section 607.


SECTION 1114. Article Applicable to Paying Agents.

                  In case at any time any Paying Agent other than the Trustee
shall have been appointed by the Company and be then acting hereunder, the term
"Trustee" as used in this Article shall in such case (unless the context
otherwise requires) be construed as extending to and including such Paying Agent
within its meaning as fully for all intents and purposes as if such Paying Agent
were named in this Article in addition to or in place of the Trustee; provided,
however, that Section 1113 shall not apply to the Company or any Affiliate of
the Company if it or such Affiliate acts as Paying Agent.



                                 ARTICLE TWELVE

                            Conversion of Securities

SECTION 1201. Terms of Conversion and Settlement.

At any time not more than 20 Trading Days nor fewer than two Trading Days
immediately prior to, but not including, the Conversion Date, any Holder may
elect (a "Conversion Election"), by written notice to the Trustee, to convert a
Security on the Conversion Date, into the right to receive in respect of each
Security the sum of (i) the Conversion Amount (as defined below) payable at the
Company's option in either Common Shares or in cash, plus (ii) the Additional
Amount (as defined below) payable in cash. Any Holder who does not make a timely
Conversion Election shall receive on the Conversion Date, in lieu of the
Conversion Amount and the Additional Amount and in full satisfaction of the
Holder's Securities, the principal sum of $_______ dollars in cash for each
Security. The Company will mail written notice of its election to pay the
Conversion Amount in either Common Shares or cash to each holder of record of
Convertible Notes not less than 30 Trading Days nor more than 45 Trading Days
prior to the Conversion Date and will include with such notice a description of
the procedure for making a Conversion Election. The "Conversion Amount" means an
amount (payable in either Common Shares or cash) for each Security equal to the
Current Market Price of Common Shares multiplied by the product of (x) .995 and
(y) the Convertible Note Exchange Rate. The Convertible Note Exchange Rate is
equal to (a) if the Current Market Price of the Common Shares is greater than or
equal to $_______ per share (the "Threshold Price"), a ratio equal to the
Threshold Price divided by the Current Market Price,


                                      -66-
   77
(b) if the Current Market Price is less than the Threshold Price but greater
than the Initial Price, a ratio of 1.0, and (c) if the Current Market Price is
less than or equal to the Initial Price, a ratio equal to the Initial Price
divided by the Current Market Price, subject in each case to adjustments in
certain events. The "Additional Amount" means an amount (payable in cash) in
respect of each Security equal to [$ Equal to .005 of Initial Price of the
Common Share].

                  The Convertible Note Exchange Rate is subject to adjustment as
appropriate in certain circumstances, including if the Company (a) pays a share
dividend or makes a distribution with respect to its Common Shares in Common
Shares, (b) subdivides or splits its outstanding Common Shares, (c) combines its
outstanding Common Shares into a smaller number of shares, (d) issues by
reclassification of its Common Shares any capital shares , (e) issues certain
rights or warrants to all holders of its Common Shares or (f) pays a dividend
of, or distributes to all holders of its Common Shares, evidences of its
indebtedness or other assets (including capital shares of the Company but
excluding any cash dividends or distributions and dividends referred to in
clause (a) above). In addition, the Company will be entitled to make such upward
adjustments in the Convertible Note Exchange Rate as the Company, in its
discretion, determines to be advisable, in order that any share dividend,
subdivision of shares, distribution of rights to purchase shares or securities,
or distribution of securities convertible into or exchangeable for shares (or
any transaction which could be treated as any of the foregoing transactions
pursuant to Section 305 of the Internal Revenue Code of 1986, as amended)
hereafter made by the Company to its shareholders will not be taxable. All
adjustments to the Convertible Note Exchange Rate will be calculated to the
nearest 1/10,000th of a Common Share. No adjustment in the Convertible Note
Exchange Rate will be required unless such adjustment would require an increase
or decrease of at least one percent in the Convertible Note Exchange Rate,
provided that any adjustments which, by reason of the foregoing, are not
required to be made shall be carried forward and taken into account in any
subsequent adjustment. All adjustments will be made successively. All
adjustments to the Convertible Note Exchange Rate shall be made consistent with
the provisions of paragraphs (d) and (f) of Section 4.4.3 of the Restated
Articles of Incorporation of the Company dated ________, 199_, treating the
Securities in the same manner as the Series A Preferred Shares for which they
were exchanged.


                                      -67-
   78
                  Whenever the Convertible Note Exchange Rate is adjusted as
provided in the preceding paragraph, the Company will file with the Trustee a
certificate with respect to such adjustment, make a prompt public announcement
thereof and mail a notice to Holders providing specified information with
respect to such adjustment.


                  The Company will reserve and at all times keep available, free
from preemptive rights, out of its authorized but unissued shares, for the
purpose of effecting the conversion of the Securities, such number of its duly
authorized Common Shares as will from time to time be sufficient to effect the
conversion of all outstanding Securities; provided, however, that the Company
shall not be obligated to keep such shares available with respect to any
Securities during any time that the conversion of such Securities is prohibited
under a contract or other agreement between the holder of such Securities and
the Company.

                  The Company will mail written notice of its election to pay
the Conversion Amount in either Common Shares or cash to each Holder of record
of Securities not less than 30 Trading Days nor more than 45 Trading Days prior
to the Conversion Date. In the case of election by the Company to pay the
Conversion Amount in Common Shares the Company will issue the number of full
shares of Common Shares issuable in payment thereof. No fractional Common Shares
will be issued on payment of the Conversion Amount, but in lieu thereof, such
fractional interest shall be rounded down to the next whole share and an amount
will be paid in cash by the Company for such fractional interest based upon the
Current Market Price.

SECTION 1202.  Merger Adjustments

                  In case of any consolidation or merger to which the Company is
a party (other than a merger or consolidation in which the Company is the
continuing corporation and in which the Common Shares outstanding immediately
prior to the merger or consolidation remain unchanged), or in case of any sale
or transfer to another entity of the property of the Company as an entirety or
substantially as an entirety, or in case of any statutory share exchange with
another entity (other than in connection with an acquisition in which the Common
Shares outstanding immediately prior to the share exchange remain unchanged),
each Security shall, after consummation of such transaction, be subject to (i)
conversion at the option of the holder into the kind and


                                      -68-
   79
amount of securities, cash, or other property receivable upon consummation of
such transaction by a holder of the number of Common Shares into which such
Securities might have been converted immediately prior to consummation of such
transaction and (ii) conversion on the Conversion Date into the kind and amount
of securities, cash, or other property receivable upon consummation of such
transaction by a holder of the number of Common Shares into which such Security
would have been converted if the conversion on the Conversion Date had occurred
immediately prior to the date of consummation of such transaction assuming in
each case that such holder of Common Shares failed to exercise rights of
election if any, as to the kind or amount of securities, cash, or other property
receivable upon consummation of such transaction (provided that if the kind or
amount of securities, cash, or other property receivable upon consummation of
such transaction is not the same for each nonelecting share, then the kind and
amount of securities, cash, or other property receivable upon consummation of
such transaction for each nonelecting share shall be deemed to be the kind and
amount so receivable per share by a plurality of the nonelecting shares). The
kind and amount of securities into which the Securities shall be convertible
after consummation of such transaction shall be subject to adjustment as
described above under Section 1201 following the date of consummation of such
transaction. The Company may not become a party to any such transaction unless
the terms thereof are consistent with the foregoing.



                  This instrument may be executed in any number of counterparts,
each of which so executed shall be deemed to be an original, but all such
counterparts shall together constitute but one and the same instrument.

                  IN WITNESS WHEREOF, the parties hereto have caused this
Indenture to be duly executed, and their respective corporate seals to be
hereunto affixed and attested, all as of the day and year first above written.


                                                  MICROSOFT CORPORATION
                                                  -----------------------------


                                                  By___________________________

Attest:


                                      -69-
   80
- --------------------------


                                                   CITICORP, N.A.
                                                   -----------------------------


                                                   By___________________________

Attest:


- ---------------------------

                                      -70-
   81
STATE OF NEW YORK  )   ss.:
COUNTY OF NEW YORK )


                  On the _____ day of __________, 19__, before me personally
came ___________________________, to me known, who, being by me duly sworn, did
depose and say that [he --she] is
___________________________________________________ of
___________________________, one of the corporations described in and which
executed the foregoing instrument; that [he -- she] knows the seal of said
corporation; that the seal affixed to said instrument is such corporate seal;
that it was so affixed by authority of the Board of Directors of said
corporation, and that [he -- she] signed [his -her] name thereto by like
authority.



                                                  ------------------------------






STATE OF NEW YORK  )   ss.:
COUNTY OF NEW YORK )


                  On the _____ day of __________, 19__, before me personally
came ___________________________, to me known, who, being by me duly sworn, did
depose and say that [he --she] is
___________________________________________________ of
___________________________, one of the corporations described in and which
executed the foregoing instrument; that [he -- she] knows the seal of said
corporation; that the seal affixed to said instrument is such corporate seal;
that it was so affixed by authority of the Board of Directors of said
corporation, and that [he -- she] signed [his -- her] name thereto by like
authority.



                                                  ------------------------------


                                      -71-