December 27, 2000


PMC - Sierra, Inc.
105 - 8555 Baxter Place
Burnaby, B.C.
V5A 4V7

Attention:  Mr. John Sullivan

Dear Sirs:

         We, CIBC Inc., are pleased to establish the following credit for you,
our customer.


                            Committed Operating Line



Credit Limit:            U.S.  $25,000,000,  less  the  U.S.  equivalent  of the
                         principal  amount  at the  time of the  liabilities  of
                         PMC-Sierra Ltd., a Canadian  corporation,  ("PMC Ltd.")
                         in connection with its operating line facility pursuant
                         to the credit  agreement  issued by  Canadian  Imperial
                         Bank of Commerce  ("CIBC") on or about the date hereof,
                         as amended and replaced  from time to time,  (the "CIBC
                         Credit Agreement").

Availability:            May be  availed  by you by way of U.S.  alternate  base
                         rate loans, and/or LIBOR Loans and/or financial standby
                         letters of credit.  Availments by way of U.S. alternate
                         base rate loans  and/or  LIBOR Loans will be limited to
                         minimum draws of $1,000,000.

Description and Rate:    A revolving  committed  credit,  for  general  business
                         purposes, having the following parts:

                              (1)      U.S. alternate base rate loans.  The
                                       Interest Rate is as follows: U.S.
                                       Alternate Base Rate plus 0% per year.
                              (2)      U.S. dollar LIBOR loans.  The Interest
                                       Rate is as follows:  LIBO Rate plus 1.0%
                                       per year.

                              (3)      Financial standby letters of credit.  The
                                       fees are equal to 1% of the principal
                                       amount of the L/C, plus out of pocket
                                       expenses.

Letters of Credit:       L/Cs  may not  have  terms to  expiry  of more  than 12
                         months or beyond the committed term of this Credit. Our
                         standard  L/C  documentation  is also  required.  If we
                         issue  an  L/C,  the  available  Credit  Limit  will be
                         reduced by 100% of the face amount of the L/C. If there
                         is a drawing  under any L/C,  you will  forthwith  upon
                         demand pay us the amount(s) drawn under the L/C. If you
                         do not pay us the amount demanded  interest will accrue
                         on the  amount  drawn  under  the  L/C  at the  Default
                         Interest  Rate until the amount  drawn under the L/C is
                         paid in full,  unless you have made other  arrangements
                         with us.



Repayment/Termination:   Repayments  of U.S.  alternate  base rate loans  and/or
                         LIBOR  Loans must be in minimum  amounts of  $1,000,000
                         or, if less, the then outstanding amount thereof.

                         This  Credit  will  expire two years  after the date of
                         this Agreement,  except CIBC Inc. may from time to time
                         renew its  commitment by an additional  year;  provided
                         that this  Credit  must be  repaid in full  immediately
                         upon, and further availments will cease to be available
                         upon,  the earlier of the expiry of the committed  term
                         of this Credit,  the occurrence of an Event of Default,
                         or there having occurred (in our reasonable  opinion) a
                         change in effective control of your company or PMC Ltd.
                         with  respect to the power to elect the majority of the
                         Board of Directors of your company or PMC Ltd. ("Change
                         of Control").

Standby Fee:             A standby  fee of 25 basis  points  per  year,  payable
                         monthly in arrears, will apply to the unused portion of
                         this Credit.


                                    Security

Security:                Unsecured.


                                    Covenants



Financial Covenants:     You   will   ensure   that  the   following   financial
                         covenants/requirements,  tested  at the  end of each of
                         your fiscal  quarters,  are  satisfied  on the basis of
                         your consolidated financial statements:

                         Quick Ratio:  The Quick Ratio (cash or equivalents plus
                         accounts  receivable  plus the  unused  portion of this
                         Credit,  divided  by current  liabilities)  must not be
                         less than 0.8:1.

                         Debt to Effective  Equity Ratio:  The Debt to Effective
                         Equity Ratio (using the following definitions) must not
                         exceed 2:1.

                              Debt  is  defined  as all  debts  and  liabilities
                              (whether absolute or contingent, and including all
                              lease  obligations  which  would be required to be
                              disclosed   on   your    consolidated    financial
                              statements)  excluding  deferred  income taxes and
                              excluding debt  subordinated and postponed to CIBC
                              Inc.  and CIBC  (provided  that  all the  terms of
                              which are satisfactory to such lenders).

                              Effective Equity is 0fined as the aggregate of:

                              (a)  amounts  paid  up on  issued  and  outstandin
                                   shares of all classes;

                              (b) retained earnings;

                              (c) contributed surplus;

                              (d) debt  subordinated  and postponed to CIBC Inc.
                                  and CIBC (provided that all the terms of which
                              are satisfactory   to  such   lenders)  to  the
                              prior repayment  and  satisfaction  of  all  debts
                              and  liabilities  pursuant to this Agreement,  the
                              CIBC Credit  Agreement and your  guarantee
                              thereunder; plus

                              (e)  Special  Shares of PMC Ltd  convertible  into
                                   your common stock;

                              minus all intangibles  including,  but not limited
                              to  goodwill,  copyrights,   patents,  trademarks,
                              licences,  research  and  development  costs,  and
                              deferred development costs;  provided that for the
                              purposes  of this  ratio,  equity  investments  in
                              non-affiliated  companies  will not be  treated as
                              intangibles  so long as the combined  total of all
                              such investments  does not exceed  $40,000,000 (or
                              any higher  amount  agreed to in this regard by us
                              in writing).

                         Profitability:  An operating  loss must not be incurred
                         in two  consecutive  fiscal  quarters  except where the
                         operating  loss is caused by In  Process  Research  and
                         Development   charges   relating  to  purchase   method
                         accounting for acquisitions.

                         Capital Expenditures  (excluding  acquisitions):  Total
                         capital expenditures,  excluding acquisitions permitted
                         below under  "Restriction  on  Acquisitions",  must not
                         exceed  $120,000,000 in fiscal 2000 and $200,000,000 in
                         fiscal 2001 without our prior  written  consent  (which
                         consent will not be unreasonably withheld).


Other Covenants:         Restriction on Acquisitions:  "All Stock Acquisitions":
                         So long as the  Borrower's  Debt  to  Effective  Equity
                         Ratio is less  than  1:1,  the  Borrower  or any of its
                         Subsidiaries   are   permitted   to  make   all   stock
                         acquisitions  up to  an  aggregate  total  of  U.S.  $2
                         billion   (Note:   this  limit   excludes   the  recent
                         acquisitions of Toucan  Technology,  AANetcom Inc., and
                         Extreme  Packet  Devices,  Inc.)  annually  without the
                         Lenders' consent being obtained  providing the Borrower
                         remains  within  all of the  provisions  of the  credit
                         facilities.

                         All other forms of acquisitions will be governed by the
                         following restrictions:

                         Neither you nor any of your  subsidiaries will make any
                         material acquisitions (excluding all stock acquisitions
                         as detailed  above) without our prior written  consent,
                         except,  provided  no Event of Default  exists nor will
                         result from the proposed  acquisition during the fiscal
                         quarter  immediately   succeeding  the  fiscal  quarter
                         within which the  acquisition  was made  (calculated on
                         the   basis   of  your   financial   statements   on  a
                         consolidated  basis  submitted for your fiscal  quarter
                         immediately preceding the date of the acquisition), and
                         provided there has not been a Change of Control of your
                         company or PMC Ltd:



                         (a)  you,  or any of  your  subsidiaries,  may  make an
                              acquisition  without our prior written  consent if
                              the  purchase  price in  respect  of the  proposed
                              acquisition  does not exceed the Applicable  Limit
                              referred to below; and

                         (b)  if the  purchase  price in respect of the proposed
                              acquisition  exceeds the Applicable Limit referred
                              to below,  you, or any of your  subsidiaries,  may
                              nevertheless make the proposed  acquisition if you
                              first provide proforma financial  statements to us
                              which take into account the effect of the proposed
                              acquisition  and all debt  incurred  or assumed in
                              connection   therewith,   and  which   demonstrate
                              compliance        with        all        financial
                              covenants/requirements   set  forth  herein,  both
                              before and after the proposed acquisition.

                         For the purposes hereof,  the "Applicable  Limit" means
                         $250,000,000 unless your Debt to Effective Equity Ratio
                         on a consolidated  basis (exclusive of the acquisition)
                         exceeds 1:1, in which case the "Applicable Limit" means
                         $125,000,000.

                         Restriction on Divestments: Neither you nor any of your
                         subsidiaries    will   make   any   material   business
                         divestment,  other  than for  cash,  without  our prior
                         written  consent.  The cash  proceeds from the material
                         divestment will be used in the first instance to retire
                         any  outstanding   borrowings/indebtedness   under  the
                         credit facilities established hereunder which, however,
                         may be readvanced or incurred subject to your continued
                         compliance  with all of the terms and conditions of the
                         credit facilities provided for hereunder.

                         Restriction on Cash  Dividends:  You will not issue any
                         cash dividends without our prior written consent.

                         Negative   Pledge:   Neither   you   nor  any  of  your
                         subsidiaries  will  create  or allow any Lien on any of
                         your/their  present or future assets, nor will you/they
                         assign  any  right to any  income,  without  our  prior
                         written consent, except you/they are permitted to enter
                         into  lease  commitments  or  Purchase  Money  Liens on
                         normal  commercial  terms,  in the  ordinary  course of
                         business  up  to   $50,000,000  in  each  fiscal  year,
                         provided  no  Event  of  Default  exists  nor  will the
                         proposed  transaction give rise to an Event of Default,
                         and provided  there has not been a Change of Control of
                         your company or PMC Ltd.


Reporting Requirements: (1)   Within  30  days  of each  quarter-end,  you  will
                              provide us with a consolidated  aged list of trade
                              accounts receivable, as of that quarter-end.

                        (2)   Within  60 days  of the end of each of the  first,
                              second  and third  quarters,  you will  provide us
                              with  a  copy  of  your  Form  10-Q,  as  of  each
                              quarter-end.

                        (3)   Within 120 days of each fiscal year-end,  you will
                              provide  us with a copy of  your  Form  10-K as of
                              that year-end,  which is to include a copy of your
                              audited     consolidated     year-end    financial
                              statements.



                                Other Provisions


Indemnity re Reserves,   If the introduction or  implementation of or any change
Capital Adequacy, Etc.   in or in the  interpretation  of, or any  change in its
                         application  to us of,  any  law or any  regulation  or
                         guideline   issued  by  any   central   bank  or  other
                         governmental authority (whether or not having the force
                         of law),  including  without  limitation any reserve or
                         special deposit  requirement or any tax (other than tax
                         on our general income) or any capital requirement,  has
                         (due  to  our  compliance)  the  effect,   directly  or
                         indirectly,  of  (i)  increasing  the  cost  to  us  of
                         performing our obligations  hereunder or under any L/C;
                         (ii)  reducing any amount  received or receivable by us
                         hereunder or our effective  return  hereunder or on our
                         capital;  or (iii) causing us to make any payment or to
                         forgo  any  return  based  on any  amount  received  or
                         receivable  by us  hereunder  or in respect of any L/C;
                         then  upon  demand  from time to time you will pay such
                         amount  as  shall  compensate  us for  any  such  cost,
                         reduction,  payment or forgone return. You will further
                         indemnify us for all  out-of-pocket  costs,  losses and
                         expenses  incurred by us in connection with any L/C and
                         agree  that we will  have no  liability  to you for any
                         reason  in  respect  of any  availment  other  than  on
                         account of our gross  negligence or wilful  misconduct.
                         Any   certificate  of  CIBC  Inc.  in  respect  of  the
                         foregoing  will be  conclusive  and  binding  upon you,
                         except  for  manifest  error,  provided  that we  shall
                         determine  the amounts  owing to us in good faith using
                         any reasonable averaging and attribution methods.




Obligations re L/Cs if   You  will  pay to us on  demand  all of our  contingent
Credit Terminated:       liability  in respect of (i) any L/C  outstanding  upon
                         any  termination  of this Credit and (ii) any L/C which
                         is  the   subject   matter  of  any  order,   judgment,
                         injunction  or  other  such  determination  restricting
                         payment by us under and in accordance  with such L/C or
                         extending  our  liability  under  such L/C  beyond  the
                         expiration  date stated therein (an "Order").  We agree
                         that we will,  with respect to each such L/C,  upon the
                         later of:

                         (a)  the earlier  of: (i) the date on which  either the
                              original counterpart of such L/C is returned to us
                              for   cancellation  or  we  are  released  by  the
                              beneficiary   from  any  further   obligations  in
                              respect of such L/C;  and, (ii) the expiry of such
                              L/C; and

                        (b)   the date on which any  final  order,  judgment  or
                              other  such  determination  has been  rendered  or
                              issued either terminating the applicable Order, or
                              permanently  enjoining  us from paying  under such
                              L/C;

                         pay to you an amount  equal to any excess of the amount
                         received by us hereunder  in respect of our  contingent
                         liability  under such L/C (the "Received  Amount") over
                         the  total  of  amounts  applied  to  reimburse  us for
                         amounts paid by us under such L/C (CIBC Inc. having the
                         right to so appropriate  such funds),  together with an
                         additional amount computed by applying to the amount of
                         such excess from time to time a per annum rate equal to
                         3% per year less  than the U.S.  Alternate  Base  Rate.
                         Such additional amount shall be calculated daily on the
                         basis of a calendar  year for the actual number of days
                         elapsed from and including the date of payment to us of
                         the Received  Amount to (but not including) the date of
                         return to you of the excess.

Default Interest Rate:   Currently 21% per year.


Next Scheduled Review    May 31,  2001.  Such  that  CIBC  Inc.  may  renew  its
Date:                    commitment  by  an  additional  one  year  on  mutually
                         agreeable terms.


Termination of Agreement This  Agreement  may be  terminated  by you at any time
by Borrower:             upon  written  notice to CIBC Inc. and upon payment and
                         satisfaction  of all of  your  debts  and  liabilities,
                         absolute and contingent, to CIBC Inc. and CIBC.


Standard Credit Terms:   The   attached   Schedule  -  Standard   Credit   Terms
                         (including   the   revisions   indicated   thereon   in
                         bold-faced  or  struck-out  text)  forms  part  of this
                         Agreement.


Expenses and Costs:      All  reasonable out of pocket  expenses  incurred by us
                         (excluding any syndication or  participation  expenses)
                         will be for your account.


Amendment:               This  Agreement  may  only  be  amended  by a  document
                         executed by the party against whom  enforcement  of the
                         amendment is sought.


Assignment:              You may not  assign  this  Agreement.  We may assign or
                         grant  participation  in  our  rights  and  obligations
                         hereunder, with each such assignee or participant being
                         entitled to rely on all indemnities contained herein.


Governing Law:           This Agreement will be construed in accordance with the
                         laws of the State of New York.


Set-Off:                 Upon the  occurrence of an Event of Default and so long
                         as the Event of Default exists,  we may at any time and
                         from  time to time,  without  notice  to you (any  such
                         notice being expressly  waived),  set-off and apply any
                         and all  deposits  (general or  special)  and any other
                         indebtedness  at any time held by or owing by us to you
                         or for your  credit  or your  account,  against  and on
                         account of any or all of your debts and  liabilities to
                         us hereunder, whether or not then due, whether absolute
                         or contingent, and irrespective of the currency(ies) in
                         question.


Entire Agreement:        In accordance with the scheduled review date set out in
                         the Credit  Agreement  dated June 15,  2000,  issued by
                         CIBC Inc. to you the "Previous Credit Agreement",  this
                         Agreement  extends the Previous  Credit  Agreement  and
                         restates the terms thereof as set out above.  There are
                         no   understandings,    inducements,   representations,
                         warranties,   collateral   agreements   or   conditions
                         affecting or supported by this Agreement  other than as
                         expressed in this Agreement.


Accounting Terms         All  accounting  terms not  otherwise  defined have the
and GAAP:                meanings  assigned to them in accordance  with GAAP. In
                         this  Agreement,   "GAAP"  means   generally   accepted
                         accounting  principles  from time to time applicable in
                         the  United  States  of  America  and  approved  by the
                         Financial  Accounting  Standards Board or any successor
                         thereto,  as  applied  on a basis  consistent  with the
                         financial  statements of the preceding  fiscal  period,
                         except as disclosed  therein or where the inconsistency
                         is immaterial.


Successors:

In this  Agreement,      Unless otherwise indicated all dollar amounts referred
any  reference to a      to in this Agreement are in lawful money of the United
corporate entity that    States of America
is a successor to such
entity, whether immediate
or derivative. Currency:


Waviers of Jury Trial:   CIBC Inc. and PMC - Sierra, Inc. hereby irrevocably and
                         unconditionally waive trial by jury in any legal action
                         or proceeding  relating to this  Agreement or any other
                         loan document and for any counterclaim therein.


Please  indicate  your  acceptance  of these terms by returning a signed copy of
this  Agreement.  If we do not receive a signed copy by December 31, 2000,  then
this offer will expire.


Upon  acceptance,  this  Agreement  extends the Previous  Credit  Agreements and
restates the terms thereof, as set out above. Outstanding amounts (and security)
under the Previous Credit Agreement will be covered by this Agreement.


Yours truly,


CIBC Inc.


by:_________________________
Howard A. Palmer
Authorized Signatory
Phone no.: (212) 856-3504
Fax no.:   (212) 856-3761



Acknowledgement:         The undersigned certifies that all information provided
                         to CIBC Inc.  is true,  and  acknowledges  receipt of a
                         copy of,  and  accepts  the  terms of,  this  Agreement
                         (including  the  attached  Schedule -  Standard  Credit
                         Terms).



                                   Accepted this       day of ______, 2000.
                                                 -----

                                   PMC - Sierra, Inc.

                                   By:_______________________

                                   Name:_____________________

                                   Title:____________________


                                   By:_______________________

                                   Name:_____________________

                                   Title:____________________




Form 6326-95/06                                                       (WP51CRED)


                        Schedule - Standard Credit Terms


ARTICLE 1 - GENERAL



1.1   Interest Rate.  You will pay interest on each Credit at nominal rates per
year equal to:

  (a) for  amounts  above the Credit  Limit of a Credit or a part of a Credit or
  for amounts that are not paid when due, the Default Interest Rate, and

  (b) for any other amounts, the rate specified in this Agreement.

1.2 Variable  interest.  Each  variable  interest  rate  provided for under this
Agreement will change automatically,  without notice, whenever the Prime Rate or
the U.S. Alternate Base Rate, as the case may be, changes.

1.3 Payment of  interest.  Interest is  calculated  on the daily  balance of the
Credit  at the end of  each  day.  Interest  is due  once a  month,  unless  the
Agreement  states otherwise and you will pay the interest when it is due. Unless
you have made other  arrangements with us regarding the payment of interest,  we
will  automatically  debit your Operating Account for interest amounts owing. If
your Operating  Account is in overdraft and you do not deposit to the account an
amount  equal to the  monthly  interest  payment,  the effect is that we will be
charging  interest on overdue interest (which is known as  compounding).  Unpaid
interest  continues to compound whether or not we have demanded payment from you
or started a legal action, or get judgment, against you.

1.4   Default Interest.  To determine whether Default Interest is to be charged,
the following rules apply:

  (a) Default  Interest  will be charged on the amount  that  exceeds the Credit
  Limit of any particular Credit.

  (b) If there are several parts of a Credit,  Default  Interest will be charged
  if the Credit Limit of a particular part is exceeded.  For example,  if Credit
  A's limit is $250,000,  and the limit of one part is $100,000 and the limit of
  that part is  exceeded by $25,000,  Default  Interest  will be charged on that
  $25,000 excess,  even if the total amount  outstanding  under Credit A is less
  than $250,000.

1.5 Fees.  You will pay CIBC  Inc.'s  fees for each  Credit as  outlined  in the
Letter.  You will also reimburse us for all  reasonable  fees  (including  legal
fees) and out-of-pocket  expenses  incurred in registering any security,  and in
enforcing our rights under this Agreement or any security. We will automatically
debit your Operating Account for fee amounts owing.

1.6  Our  rights  re  demand  Credits.   At  CIBC  Inc.,  we  believe  that  the
banker-customer  relationship  is based  on  mutual  trust  and  respect.  It is
important  for us to know all the  relevant  information  (whether  good or bad)
about  your  business.  CIBC  Inc.  is  itself a  business.  Managing  risks and
monitoring  our  customers'  ability  to repay is  critical  to us.  We can only
continue to lend when we feel that we are likely to be repaid.  As a result,  if
you do something that  jeopardizes  that  relationship,  or if we no longer feel
that you are likely to repay all  amounts  borrowed,  we may have to act. We may
decide to act, for example,  because of something you have done,  information we
receive  about your  business,  or  changes  to the  economy  that  affect  your
business.  Some of the actions that we may decide to take include  requiring you
to give us more financial information, negotiating a change in the interest rate
or fees, or asking you to get further accounting assistance,  put more cash into
the business, provide more security, or produce a satisfactory business plan. It
is  important  to us  that  your  business  succeeds.  We may,  however,  at our
discretion,  demand  immediate  repayment of any  outstanding  amounts under any
demand  Credit.  We may also,  at any time and for any cause,  cancel the unused
portion of any demand Credit. Under normal circumstances,  however, we will give
you 30 days' notice of any of these actions.

1.7   Payments.  If any payment is due on a day other than a Business Day, then
the payment is due on the next Business Day.

1.8 Applying money  received.  If you have not made payments as required by this
Agreement,  or if you have failed to satisfy any term of this  Agreement (or any
other agreement you have that relates to this Agreement),  or at any time before
default  but after we have given you  appropriate  notice,  we may decide how to
apply any money that we receive.  This means that we may choose  which Credit to
apply the money against,  or what mix of principal,  interest,  fees and overdue
amounts within any Credit will be paid.

1.9 Information requirements. We may from time to time reasonably require you to
provide further information about your business. We may require information from
you to be in a form  acceptable  to us.  We will  use your  information  only in
connection with the credits and will keep it confidential  unless required to be
disclosed by law or court order.

1.10 Insurance.  You will keep all your business assets and property insured (to
the full  insurable  value)  against  loss or damage by fire and all other risks
usual for  property  such as yours (plus for any other  risks we may  reasonably
require). If we request, these policies will include a loss payee clause (and if
you are giving us mortgage security,  a mortgagee clause).  As further security,
you assign all insurance  proceeds to us. If we ask, you will give us either the
policies  themselves or adequate evidence of their existence.  If your insurance
coverage for any reason stops,  we may (but do not have to) insure the property.
We will automatically  debit your Operating Account for these amounts.  Finally,
you will notify us immediately of any loss or damage to the property.

1.11  Environmental.  You will carry on your business,  and maintain your assets
and  property,  in  accordance  with  all  applicable   environmental  laws  and
regulations.  If (a) there is any  release,  deposit,  discharge  or disposal of
pollutants of any sort  (collectively,  a "Discharge") in connection with either
your business or your property, and we pay any fines or for any clean-up, or (b)
we suffer any loss or damage as a result of any  Discharge,  you will  reimburse
CIBC Inc., its directors, officers, employees and agents for any and all losses,
damages,  fines,  costs and other amounts (including amounts spent preparing any
necessary environmental  assessment or other reports, or defending any lawsuits)
that  result.  If we ask,  you  will  defend  any  lawsuits,  investigations  or
prosecutions  brought  against  CIBC  Inc.  or any of its  directors,  officers,
employees and agents in connection  with any  Discharge.  Your  obligation to us
under this  section  continues  even after all Credits have been repaid and this
Agreement has terminated.

1.12 Consent to release information. We may from time to time give any credit or
other  information  about you to, or  receive  such  information  from,  (a) any
financial institution,  credit reporting agency, rating agency or credit bureau,
(b) any person,  firm or  corporation  with whom you may have or propose to have
financial  dealings,  and (c) any person, firm or corporation in connection with
any dealings you have or propose to have with us. You agree that we may use that
information to establish and maintain your relationship with us and to offer any
services as permitted  by law,  including  services and products  offered by our
subsidiaries when it is considered that this may be suitable to you.

1.13 Our pricing policy: Fees, interest rates and other charges for your banking
arrangements are dependent upon each other. If you decide to cancel any of these
arrangements,  you will have to pay us any  increased  or added  fees,  interest
rates and  charges we  determine  and notify you of.  These  increased  or added
amounts are effective from the date of the changes that you make.

1.14 Proof of debt.  This  Agreement  provides the proof,  between CIBC Inc. and
you, of the credit made  available  to you.  There may be times when the type of
Credit you have requires you to sign additional  documents.  Throughout the time
that we provide you credit under this  Agreement,  our loan  accounting  records
will provide  complete proof of all terms and conditions of your credit (such as
principal loan balances, interest calculations, and payment dates).

1.15 Renewals of this  Agreement.  This Agreement will remain in effect for your
Credits for as long as they  remain  unchanged.  We have shown a Next  Scheduled
Review Date in the Letter. If there are no changes to the Credits this Agreement
will continue to apply, and you will not need to sign anything further. If there
are any changes, we will provide you with either an amending agreement, or a new
replacement Letter, for you to sign.

1.16  Confidentiality:  The terms of this Agreement are confidential between you
and CIBC  Inc..  You  therefore  agree  not to  disclose  the  contents  of this
Agreement to anyone  except your  professional  advisors or (as required by law)
any regulatory or governmental body, including,  without limitation,  the United
States Securities and Exchange Commission.

1.17  Pre-conditions.  You may use the Credits granted to you under this
Agreement only if:

  (a) we have received properly signed copies of all  documentation  that we may
  reasonably  require and which we have provided to you in  connection  with the
  operation of your accounts and your ability to borrow and give security;

  (b)  all the  required  security  has  been  received  and  registered  to our
  satisfaction; (c) any special provisions or conditions set forth in the Letter
  have been complied with; and (d) if applicable, you have given us the required
  number of days notice for a drawing under a Credit.

1.18  Notices.  We may give you any notice in person or by telephone, or by
letter that is sent either by fax or by mail.

1.19 Use of the Operating  Line.  You will use your Operating Line only for your
business  operating  cash  needs.  You are  responsible  for all debits from the
Operating  Account  that you  have  either  initiated  (such  as  cheques,  loan
payments,  pre-authorized  debits,  etc.) or authorized us to make. Payments are
made by making deposits to the Operating Account. You may not at any time exceed
the  Credit  Limit.  We may,  without  notice to you,  return any debit from the
Operating  Account  that,  if paid,  would  result  in the  Credit  Limit  being
exceeded,  unless  you have made  prior  arrangements  with us. If we pay any of
these debits, you must repay us immediately the amount by which the Credit Limit
is exceeded.

1.20 Foreign Currency  Conversion.  If this Agreement  includes foreign currency
Credits, then currency changes may affect whether either the Credit Limit of any
Credit or the Overall Credit Limit has been exceeded.

  (a)  See  section  1.4  for the  general  rules  on how  Default  Interest  is
  calculated.

  (b) To determine the Overall Credit Limit,  all foreign  currency  amounts are
  converted to U.S. dollars, even if the Credit Limits of any particular Credits
  are quoted  directly  in a foreign  currency  (such as Canadian  dollars).  No
  matter  how the Credit  Limit of a  particular  Credit is  quoted,  therefore,
  currency  fluctuations  can affect  whether the Overall  Credit Limit has been
  exceeded. For example, if Credits X and Y have Credit Limits of US$100,000 and
  CDN$50,000,  respectively,  with an Overall  Credit  Limit of  US$135,000,  if
  Credit X is at US$90,000 and Credit Y is at CDN$45,000,  Default Interest will
  be charged only if,  after  converting  the Cdn.  dollar  amount,  the Overall
  Credit Limit is exceeded.

  (c) Whether the Credit Limit of a  particular  Credit has been  exceeded  will
  depend on how the Credit Limit is quoted, as described below.

  (d) If the  Credit  Limit is quoted  as,  for  example,  the  Canadian  dollar
  equivalent of a U.S.  dollar  amount,  daily  exchange rate  fluctuations  may
  affect whether that Credit Limit has been exceeded. If, on the other hand, the
  Credit Limit is quoted in a foreign  currency (for  example,  directly in Cdn.
  dollars),  whether  that  Credit  Limit has been  exceeded  is  determined  by
  reference only to the closing balance of that Credit in that currency.

  (e) For example, assume an outstanding balance of a Credit on a particular day
  of CDN$200,000.  If the Credit Limit is stated as "the Cdn. dollar  equivalent
  of US$140,000", then whether the Credit Limit of that Credit has been exceeded
  will  depend on the value of the U.S.  dollar on that day.  If the  conversion
  calculations determine that the outstanding balance is under the Credit Limit,
  a drop in the value of the U.S. dollar the next day (without any change in the
  balance) may have the effect of putting that Credit over its Credit Limit. If,
  on the other hand,  the Credit  Limit is stated as  "CDN$200,000",  the Credit
  Limit is not exceeded, and a drop in the value of the dollar the next day will
  not change that (although the Overall Credit Limit may be affected).

  (f)  Conversion  calculations  are done on the  closing  daily  balance of the
  Credit.  The  conversion  factor used is the mid-point  between the buying and
  selling rate offered by CIBC Inc. (or if such rates can not be determined, the
  mid-point  between  such  rates  offered  by CIBC)  for that  currency  on the
  conversion date.

1.21  Instalment Loans.  The following terms apply to each Instalment Loan.

  (a) Non-revolving loans. Unless otherwise stated in the Letter, any Instalment
  Loan is non-revolving.  This means that any principal payment made permanently
  reduces the available Loan Amount.  Any payment we receive is applied first to
  overdue interest,  then to current interest owing, then to overdue  principal,
  then to any fees and charges owing, and finally to current principal.

  (b) Floating Rate Instalment  Loans.  Floating Rate Instalment  Loans may have
  either (i) blended payments or (ii) payments of fixed principal amounts,  plus
  interest, as described below.

      (i) Blended  payments.  If you have a Floating  Rate Loan that has blended
      payments,  the amount of your monthly payment is fixed for the term of the
      loan,  but the  interest  rate  varies  with  changes in the Prime or U.S.
      Alternate  Base Rate (as the case may be). If the Prime or U.S.  Alternate
      Base Rate  during any month is lower than what the rate was at the outset,
      you may end up paying off the loan  before  the  scheduled  end date.  If,
      however,  the Prime or U.S. Alternate Base Rate is higher than what it was
      at the outset,  the amount of principal that is paid off is reduced.  As a
      result,  you may  end up  still  owing  principal  at the end of the  term
      because of these changes in the Prime or U.S. Alternate Base Rate.

      (ii) Payments of principal plus interest. If you have a Floating Rate Loan
      that has regular principal payments,  plus interest, the principal payment
      amount of your Loan is due on each payment  date  specified in the Letter.
      The interest  payment is also due on the same date, but it is debited from
      your  Operating  Account  one or two  banking  days  later.  Although  the
      principal  payment amount is fixed,  your interest payment will usually be
      different each month, for at least one and possibly more reasons,  namely:
      the  reducing  principal  balance of your loan,  the number of days in the
      month,  and changes to the Prime Rate or U.S.  Alternate Base Rate (as the
      case may be).

  (c) Prepayment.  Unless otherwise agreed, the following terms apply to
      prepayment of any Instalment Loan:

      (i)  Floating  Rate  Instalment  Loans.  You may  prepay  all or part of a
      Floating Rate Instalment Loan (whether it is a Demand or a Committed Loan)
      at any time without notice or penalty.

      (ii) Fixed Rate  Instalment  Loans.  You may prepay all or part of a Fixed
      Rate Instalment Loan, on the following condition.  You must pay us, on the
      prepayment date, a prepayment fee equal to the interest rate  differential
      for the remainder of the term of the Loan, in accordance with the standard
      formula used by CIBC Inc. in these situations.

  (d) Demand of Fixed Rate  Demand  Instalment  Loans.  If you have a Fixed Rate
  Demand Instalment Loan and we make demand for payment, you will owe us (i) all
  outstanding  principal,  (ii) interest,  (iii) any other amount due under this
  Agreement,  and (iv) a  prepayment  fee.  The  prepayment  fee is equal to the
  interest  rate  differential  for the  remainder  of the term of the loan,  in
  accordance with the standard formula used by CIBC Inc. in these situations.

1.22 Notice of Default.  You will  promptly  notify us of the  occurrence of any
event that is an Event of  Default  (or any that would be an Event of Default if
the only thing required is either notice being given or time elapsing, or both).


                        ARTICLE 1 - LIBO RATE PROVISIONS

1.1   Definitions.  In this Agreement, the following terms have the following
meanings:

"LIBO Rate" for any LIBOR  Period means a rate of interest per year equal to the
rate at which we are prepared to offer, as at 11:00 a.m. (London,  England time)
on the second LIBOR Business Day before the start of that LIBOR Period, deposits
to leading banks in London,  England interbank  eurocurrency market in an amount
of U.S.  dollars  similar to the amount of the  applicable  LIBOR Loan and for a
deposit  period  comparable  to that LIBOR  Period;  except  that,  if we do not
receive  proper or timely  notice as required  below but we permit your request,
then the LIBOR Rate for such LIBOR Period means the rate of interest per year as
determined by us (in our absolute discretion) and offered to you and immediately
accepted by you.

"LIBOR Business Day" means a Business Day on which U.S. dollar  transactions can
be carried out between  leading  banks in the interbank  eurocurrency  market in
London, England and between CIBC Inc. and other leading banks in New York City.

"LIBOR  Loan"  means a Fixed  Rate Loan in U.S.  dollars in whole  multiples  of
US$1,000,000 on which interest is calculated by reference to a LIBO Rate.

"LIBOR  Period"  means  the  period  selected  by you in  accordance  with  this
Agreement for computing interest from time to time on a LIBOR Loan.

1.2   Availability.  LIBOR Loans are available only in whole multiples of
US$1,000,000 each, for terms of one to six months.

1.3   Required Notice.

  (a) You may draw down or roll over a LIBOR Loan,  or convert  another  type of
  Credit under this  Agreement to a LIBOR Loan, or repay a LIBOR Loan,  but only
  as provided in this Article.  Any such action must be done on a LIBOR Business
  Day.  Also,  you must give  notice (in the form we  require)  to the CIBC Inc.
  Branch/Centre before 10:00 a.m. (local time where the CIBC Inc.  Branch/Centre
  is located).  The notice must be given on the third LIBOR  Business Day before
  the requested  date of drawdown,  rollover,  conversion or repayment.  You may
  roll over or  convert an  existing  LIBOR Loan only on the expiry of its LIBOR
  Period.

  (b) If we do not receive  proper or timely notice as required by the preceding
  paragraph, we may (but we are not obliged to) decide what you are permitted to
  do for that  LIBOR  Loan.  We may,  on the  other  hand,  simply  roll over an
  existing LIBOR Loan at the end of its LIBOR Period for a new LIBOR Loan with a
  new LIBOR Period determined by us.

1.4  Maturity  Limitation.  The expiry date of a LIBOR Period for any LIBOR Loan
may not (a) be after a scheduled or required  maturity or  termination  date for
that Credit or (b)  conflict,  in our opinion,  with any  scheduled or mandatory
repayment for that Credit.

1.5 Repayments.  You may only repay all (but not part) of a LIBOR Loan, and only
on the last day of the LIBOR Period for that LIBOR Loan.

1.6 Interest Calculation and Payment. Interest at a LIBO Rate will be calculated
on the daily  balance of each LIBOR Loan for the actual  number of days elapsed,
on the basis of a 360 day year.  You will pay  interest  on each  LIBOR  Loan in
arrears at the end of each LIBOR Period. If a LIBOR Period is greater than three
months,  you will pay interest at the end of each three month period during that
LIBOR  Period,  except that  overdue  interest  will be payable  immediately  on
demand.  Overdue  amounts  in respect of a LIBOR  Loan  (including  any  overdue
interest)  may at our option be either  converted  to  another  type of loan (if
available)  under any  Credit or  considered  to be a LIBOR Loan for one or more
LIBOR Periods as we may determine.

1.7  Interest  Act.  Each nominal  rate of interest  referenced  to a LIBO Rate,
expressed as an annual rate for purposes of the Interest Act  (Canada),  is that
rate  multiplied  by the actual number of days in the calendar year in which the
rate is to be ascertained, and divided by 360.

1.8 Lack of LIBO  Rate.  At any time  before the start of any LIBOR  Period,  we
might  determine  that (a) by  reason of  circumstances  affecting  the  London,
England interbank eurocurrency market generally,  adequate and fair means do not
exist for  determining  the LIBO Rate  applicable for that LIBOR Period,  or (b)
deposits in U.S. dollars are not in the ordinary course of business available to
CIBC Inc. in that market for deposit periods  comparable to that LIBOR Period in
a total amount similar to that LIBOR Loan bearing  interest at a rate no greater
than the LIBO Rate  applicable to that LIBOR Loan. If we do, then from and after
that date, you may not roll over any existing LIBOR Loan at the end of its LIBOR
Period, or obtain any new LIBOR Loan. Our determination of any events under this
paragraph will be conclusive.

1.9  Illegality.  If at any time we  determine  in good  faith  that  any  legal
requirement  or any  official  directive  or request  (whether or not having the
force of law) by a central  bank or other  governmental  authority  will make it
unlawful or impossible for us to make,  maintain or fund any LIBOR Loan, we will
notify you accordingly. Upon receiving such a notice, you will either (a) on the
last day of the LIBOR  Period of any LIBOR Loan,  if we can continue to maintain
that loan, or (b) immediately, if we cannot legally maintain that loan,

  (1) pay us in full the then  outstanding  principal  amount of each such LIBOR
  Loan, together with all accrued interest, or

  (2) convert that loan into another type of loan allowed under this Agreement.

For clarification,  upon a payment or conversion of a LIBOR Loan made under this
section  in the  middle  of its LIBOR  Period,  you will  immediately  on demand
compensate us as provided elsewhere in this Agreement.  Our determination of any
matters under this paragraph will be conclusive.


                             ARTICLE 2 - DEFINITIONS

2.1   Definitions.  In this Agreement, the following terms have the following
meanings:

"Alternate Base Rate Loan" means a U.S. dollar loan on which interest is
calculated by reference to the U.S. Alternate Base Rate.

"Business  Day" means any day (other than a Saturday or a Sunday)  that the CIBC
Inc. Branch/Centre is open for business.

"CIBC Inc.  Branch/Centre" means the CIBC Inc. branch or banking centre noted on
the first  page of this  Agreement,  as changed  from time to time by  agreement
between the parties.

"Committed  Instalment  Loan" means an Instalment a Loan (including an operating
line)that is payable in regular  instalments  but is repayable in full only upon
the earlier of the expiry of the committed  term of the Loan,  the occurrence of
an Event of Default,  or there  having  occurred (in our  reasonable  opinion) a
Change of Control of (as defined in the Letter) of your company or PMC Ltd. Such
a Loan may be either at a fixed or a floating rate of interest.

"Credit"  means any credit  referred to in the  Letter,  and if there are two or
more parts to a Credit, "Credit" includes reference to each part.

"Credit  Limit" of any Credit  means the amount  specified  in the Letter as its
Credit  Limit,  and if there are two or more parts to a Credit,  "Credit  Limit"
includes reference to each such part.

"Default  Interest  Rate",  unless  otherwise  defined in the Letter,  means the
Standard Overdraft Rate.

"Demand  Instalment  Loan" means an Instalment Loan that is payable upon demand.
Such a Loan may be either at a fixed or a floating rate of interest.

"Event of Default" means, in connection with any Committed Instalment Loan (even
if that Loan has not yet been drawn),  the  occurrence  of any of the  following
events  (or the  occurrence  of any other  event of  default  described  in this
Agreement,  in any of the  security  documents  or in  any  other  agreement  or
document you have signed with us):

  (1) You do not pay, when due, any amount that you are required to pay us under
  this  Agreement  or otherwise  and such failure is not remedied  within 5 days
  after notice,  or you do not perform any of your other obligations to us under
  this  Agreement or otherwise and any such failure (if curable) is not remedied
  within 10 days after notice.

  (2) Any part of the security terminates or is no longer in effect, without our
  prior written consent.

  (3) You cease to carry on your business in the normal course, or it reasonably
  appears to us that that may happen.

  (4) A  representation  that  you  have  made (or  deemed  to have  made in any
  certificate or document  delivered to CIBC  hereunder) in this Agreement or in
  any security agreement is incorrect or misleading in any material respect.

  (5) (i) An  actual  or  potential  default  or  event  of  default  occurs  in
  connection  with any debt owed by you or by PMC Ltd  (including  any actual or
  potential default or event of default under the CIBC Credit  Agreement),  with
  the result that the payment of the debt has become, or is capable of becoming,
  accelerated, or (ii) you do not make a payment when due in connection with any
  such  debt  after  the  expiration  of  any  applicable  grace  period.  (This
  subsection (5), however,  applies only to amounts that we reasonably  consider
  to be material.)

  (6) If you are a corporation, there is, in our reasonable opinion, a change in
  effective control of the corporation, or if you are a partnership,  there is a
  change in the partnership membership.

  (7) We believe, in good faith and upon commercially  reasonable grounds,  that
  all or a material part of your property part of the property subject to any of
  the  security  is or is about to be  placed  in  jeopardy  or that a  material
  adverse change in your business operations, or financial affairs has occurred.

  (8) The holder of a Lien or a receiver or similar official takes possession of
  all or a material  part of your  property;  or a distress,  execution or other
  similar process is levied against any such property.

  (9) You (i) become  insolvent;  (ii) are unable generally to pay your debts as
  they become  due;  (iii) make a proposal  in  bankruptcy,  or file a notice of
  intention to make such a proposal; (iv) make an assignment in bankruptcy;  (v)
  bring a court action to have  yourself  declared  insolvent  or  bankrupt;  or
  someone else brings an action for such a  declaration;  or (vi) you default in
  payment  or  breach  any  other  material  obligation  to  any of  your  other
  creditors.

  (10) If you are a corporation,  (i) you are dissolved;  (ii) your shareholders
  or members pass a resolution for your winding-up or liquidation; (iii) someone
  goes to court seeking your winding-up or liquidation, or the appointment of an
  administrator,  conservator,  receiver,  trustee,  custodian or other  similar
  official for you or for all or substantially all your assets; or (iv) you seek
  protection under any statute offering relief against the company's creditors.

"Fixed Rate Instalment  Loan" means an Instalment Loan that is also a Fixed Rate
Loan.

"Fixed  Rate Loan"  means any loan drawn down,  converted  or  extended  under a
Credit at an interest rate which was fixed for a term,  instead of referenced to
a variable rate such as the Prime Rate or U.S.  Alternate Base Rate, at the time
of such drawdown,  conversion or extension.  For purposes of certainty,  a Fixed
Rate Loan includes a LIBOR Loan.

"Floating Rate Instalment  Loan" means an Instalment Loan that is either a Prime
Rate Loan or an Alternate Base Rate Loan.

"Instalment  Loan" means a loan that is repayable either in fixed instalments of
principal,  plus  interest,  or in blended  instalments  of both  principal  and
interest.  A  Demand  Instalment  Loan  is  repayable  on  demand.  A  Committed
Instalment Loan is repayable only upon the occurrence of an Event of Default.

"Letter" or "Agreement"  means the letter agreement between you and CIBC Inc. to
which this  Schedule  and any other  Schedules  are  attached  and  includes the
schedule(s).

"Letter of Credit" or "L/C" means a documentary or stand-by letter of credit,  a
letter of guarantee,  or a similar instrument in form and substance satisfactory
to us.

"L/C  Acceptance"  means a draft (as  defined  under the Bills of  Exchange  Act
(_____________))  payable to the  beneficiary of a documentary L/C which the L/C
applicant or beneficiary, as the case may be, has presented to us for acceptance
under the terms of the L/C.

"Lien" includes a mortgage,  charge,  lien,  security interest or encumbrance of
any sort on an asset, and includes conditional sales contracts,  title retention
agreements, capital trusts and capital leases.

"Normal  Course Lien" means a Lien that (a) arises by operation of law or in the
ordinary  course of  business as a result of owning any such asset (but does not
include a Lien given to another  creditor to secure debts owed to that creditor)
and (b), taken together with all other Normal Course Liens,  does not materially
affect the value of the asset or its use in the business.

"Operating  Account"  means the account that you normally use for the day-to-day
cash needs of your  business,  and may be either or both of a U.S.  dollar and a
Canadian dollar account.

"Prime Rate" means the variable  reference rate of interest per year declared by
CIBC from time to time to be its prime rate for  Canadian  dollar  loans made by
CIBC in Canada.

"Prime Rate Loan" means a Canadian  dollar loan on which  interest is calculated
by reference to Prime Rate.

"Purchase  Money Lien" means a Lien incurred in the ordinary  course of business
only to secure all or part of the purchase price of an asset,  or to secure debt
used only to finance all or part of the purchase of the asset.

"Standard  Overdraft Rate" means the variable  reference  interest rate per year
declared by CIBC Inc.  from time to time to be its  standard  overdraft  rate on
overdrafts in U.S. or Canadian dollar accounts  maintained with CIBC Inc. in the
United States of America.

"U.S.  Alternate Base Rate" means the variable  reference interest rate per year
as declared by CIBC Inc.  from time to time to be its base rate for U.S.  dollar
commercial  demand loans made by CIBC Inc. in the United States of America,  and
means on any day a  fluctuating  rate of interest  per year equal to the highest
of:

  (a) the rate of interest  most recently  established  by CIBC Inc. as its base
  rate for U.S. dollar  commercial  demand loans made by CIBC Inc. in the United
  States; and

  (b) the "Federal  Funds Rate" plus 0.5%,  where the Federal  Funds Rate means,
  for any particular day, the variable rate of interest per year,  calculated on
  the basis of a year of 360 days,  equal to the  weighted  average  of rates on
  overnight  federal  funds  transactions  with  members of the Federal  Reserve
  System  arranged by Federal Funds  brokers as released on the next  succeeding
  business day by the Federal Reserve Bank of New York;


Neither the U.S.  Alternate  Base Rate nor any component  thereof is necessarily
intended to be the lowest rate of interest determined by CIBC Inc. in connection
with extensions of credit.