Document:

<PAGE>
                                                                    EXHIBIT 10.1

                       FIRST AMENDMENT TO LOAN AGREEMENT

               THIS FIRST AMENDMENT ("Amendment") to the certain Loan Agreement
by and between COULTER PHARMACEUTICAL, INC., a Delaware corporation with its
principal place of business at 550 California Avenue, Suite 200, Palo Alto,
California 94306, USA ("Borrower") and SMITHKLINE BEECHAM CORPORATION, a
Pennsylvania corporation with its principal place of business at One Franklin
Plaza, Philadelphia, Pennsylvania 19101, USA ("Lender") dated October 23, 1998
("Loan Agreement") is made on this 28th day of June, 2002 ("Amendment Date").
Except as otherwise defined in this Amendment, capitalized terms used herein
shall have the meaning described to them in the Loan Agreement.

               WHEREAS, Section 9 of the Loan Agreement requires the delivery of
certain audited and unaudited financial statements by Borrower to Lender;

               WHEREAS, subsequent to the execution of the Loan Agreement,
CORIXA CORPORATION, a Delaware corporation with its principal place of business
at 1124 Columbia Street, Suite 200, Seattle, Washington ("Corixa") acquired
control of Borrower;

               WHEREAS, the parties hereto desire to amend Section 9 of the Loan
Agreement to eliminate Borrower's obligation to deliver annual audited financial
statements and to instead require Borrower and Corixa to deliver certain
quarterly and annual financial statements as provided herein;

               WHEREAS, the parties hereto desire to amend the Loan Agreement to
require Corixa to maintain certain financial covenants separate from those
applicable to Borrower; and

               WHEREAS, via this Amendment, the parties hereto desire to confirm
that the Effective Date, as such term is defined in the Loan Documents, is
December 3, 1998.

               NOW THEREFORE, in consideration of the mutual promises contained
herein, the receipt and sufficiency of which is hereby acknowledged, and
intending to be legally bound hereby, the parties hereto agree as follows:

               1. SECTION 2(b). Section 2(b) to the Loan Agreement is hereby
deleted and the following shall be substituted therefor:

               (b) PRINCIPAL PAYMENTS. (i) In the event that Borrower's EBITDA
               for the twelve (12) month period ending September 30, 2001
               exceeds U.S. $15,000,000, then on the date that is thirty-six
               (36) months after the Effective Date, Borrower shall make a
               principal payment of an amount equal to thirty-three percent
               (33.0%) of then outstanding principal balance of the Loans; (ii)
               in the event that Borrower's EBITDA for the twelve (12) month
               period ending September 30, 2002 exceeds U.S. $15,000,000, then
               on the date that is forty-eight (48) months after the Effective
               Date, Borrower shall make a principal payment of an amount equal
               to fifty percent (50.0%) of then outstanding principal balance of
               the Loans; and (iii) Borrower shall repay the entire outstanding
               unpaid principal balance of the Loans, together with all accrued
               unpaid interest thereon, on the Maturity Date. At the Borrower's
               option under this SECTION 2(b), principal payments, together with
               all accrued unpaid interest thereon, may be paid in cash or the
               amount of Corixa's Common Stock ("Shares") equal to the quotient
               of the amount repaid divided by the Share Price (as

                                       1.
<PAGE>

               hereinafter defined). The "Share Price" shall be the closing
               price of Corixa's Common Stock on the Nasdaq National Market, as
               reported by the Wall Street Journal, Western Edition (the "Wall
               Street Journal"), on the last trading day preceding the payment
               date. In the event the number of Shares so calculated would
               include a fraction of a Share, the number of Shares shall be
               decreased to the nearest whole number of Shares and the balance
               of the amount to be repaid shall be paid in cash. Any Shares
               delivered pursuant to this SECTION 2(b) shall be issued pursuant
               to an effective registration statement under the Securities Act
               of 1933, as amended, and shall be freely tradable.

               2. SECTION 8. Section 8 to the Loan Agreement is hereby deleted
and the following shall be substituted therefor:

               8. FINANCIAL COVENANTS. Borrower and Corixa covenant and agree
               that so long as any Obligations shall be outstanding or any
               Commitment shall be available, Borrower and Corixa (as
               applicable) shall maintain all of the following financial
               covenants; provided, however, that in no event shall a breach of
               any of the following financial covenants constitute an Event of
               Default:

                      (a) MINIMUM REMAINING MONTHS LIQUIDITY.

                             (i) Until such time as Borrower maintains a Debt
               Service Coverage Ratio of not less than 1.50:1.00 for two (2)
               consecutive Fiscal Quarters, Borrower shall maintain as at the
               end of each Fiscal Quarter a Remaining Months Liquidity of not
               less than six (6) months.

                             (ii) Until such time as Corixa maintains a Debt
               Service Coverage Ratio of not less than 1.50:1.00 for two (2)
               consecutive Corixa Fiscal Quarters, Corixa shall maintain as at
               the end of each Corixa Fiscal Quarter a Remaining Months
               Liquidity of not less than six (6) months.

                      (b) MINIMUM DEBT SERVICE COVERAGE RATIO.

                             (i) Borrower shall maintain as at the end of each
               Fiscal Quarter, a Debt Service Coverage Ratio of not less than
               1.50:1.00; provided, however, that Borrower shall be deemed to
               satisfy this covenant so long as Borrower maintains Remaining
               Months Liquidity of not less than six (6) months.

                             (ii) Corixa shall maintain as at the end of each
               Corixa Fiscal Quarter, a Debt Service Coverage Ratio of not less
               than 1.50:1.00; provided, however, that Corixa shall be deemed to
               satisfy this covenant so long as Corixa maintains Remaining
               Months Liquidity of not less than six (6) months.

                      (c) MINIMUM CONSOLIDATED TANGIBLE NET WORTH.

                             (i) Borrower shall maintain as at the end of each
               Fiscal Quarter, Consolidated Tangible Net Worth of an amount not
               less than U.S. $18,000,000.

                                       2.
<PAGE>

                             (ii) Corixa shall maintain as at the end of each
               Corixa Fiscal Quarter, Consolidated Tangible Net Worth of an
               amount not less than U.S. $18,000,000.

                      (d) MAXIMUM CONSOLIDATED LEVERAGE RATIO.

                             (i) Borrower shall maintain as at the end of each
               Fiscal Quarter, a Consolidated Leverage Ratio of not greater than
               1.00:1.00.

                             (ii) Corixa shall maintain as at the end of each
               Corixa Fiscal Quarter, a Consolidated Leverage Ratio of not
               greater than 1.00:1.00.

               In the event that Borrower or Corixa fail to maintain any of the
               foregoing financial covenants, then no later than three Business
               Days after the date that Borrower or Corixa becomes aware of any
               such failure (whichever becomes aware first), Borrower shall
               deposit into the Cash Collateral Account (as defined below) an
               amount of cash (the "Cash Collateral") not less than the
               then-outstanding principal amount of the Loans, grant to Lender a
               first priority perfected security interest in the Cash Collateral
               Account, and provide to Lender any documentation required to
               evidence and perfect such security interest under applicable law.
               The "Cash Collateral Account" shall be a deposit account of any
               domestic commercial bank (or the parent company of such bank)
               whose short-term commercial paper rating from Standard & Poor's
               Rating Group is at least A-1 or the equivalent thereof or from
               Moody's Investors Service, Inc. is at least P-1 or the equivalent
               thereof; provided that the Cash Collateral Account shall be
               "blocked" such that Lender shall have control, as defined under
               the Uniform Commercial Code of the applicable jurisdiction, of
               the Cash Collateral Account at any time Borrower or Corixa has
               failed to maintain a financial covenant set forth in SECTION 8
               hereof and until such time as Borrower or Corixa (or both, if
               both have failed to maintain such financial covenants) has cured
               such failure to maintain such financial covenants.

               Notwithstanding anything to the contrary herein, so long as
               Borrower has satisfied any contractual obligation to any Senior
               Lender to provide cash collateral to secure such Senior Lender's
               Funded Indebtedness upon the failure of Borrower to maintain
               financial covenants for the benefit of such Senior Lender (and
               such Senior Lender has not waived such requirement prior to the
               date upon which Borrower cures its failure to maintain such
               financial covenants), then the principal amount of the required
               Cash Collateral shall be reduced by the value of Product Accounts
               (as defined in the Security Agreement); provided, that if Senior
               Lender thereafter waives Borrower's cash collateral requirement
               to such Senior Lender, no later than three Business Days
               thereafter Borrower shall deposit into the Cash Collateral
               Account cash in a principal amount not less than the difference
               between the then-outstanding principal amount of the Loans and
               any then-existing Cash Collateral; provided further, on the date
               upon which Borrower cures its failure to maintain any of the
               financial covenants set forth in this Section 8, Lender shall
               release its security interest in all of such Cash Collateral, and
               shall notify the bank maintaining the Cash Collateral Account
               that the triggering event has been cured and that Lender rescinds
               its control of the Cash Collateral Account.

                                       3.
<PAGE>

               3. SECTION 9. Section 9 to the Loan Agreement is hereby deleted
and the following shall be substituted therefor:

               9. FINANCIAL INFORMATION. Borrower and Corixa covenant and agree
               that so long as any Obligations shall be outstanding or the
               Commitment shall be available, Borrower and Corixa shall provide
               the following financial information to Lender:

                      (a) QUARTERLY FINANCIAL STATEMENTS. As soon as practicable
               and in any event within forty-five (45) days after and as of the
               end of:

                             (i) each Fiscal Quarter, except for the fourth
               Fiscal Quarter of each Fiscal Year, internally-prepared
               consolidated balance sheets, statements of income and cash flow
               of Borrower as at the end of such period, all in reasonable
               detail and certified by the chief financial officer of Borrower
               that they (A) are complete and fairly present the financial
               condition of Borrower as at the dates indicated and the results
               of its operations and changes in its cash flow for the periods
               indicated, (B) disclose all liabilities that are required to be
               reflected or reserved against under GAAP, whether liquidated or
               unliquidated, fixed or contingent, and (C) have been prepared in
               accordance with GAAP, subject to changes resulting from normal
               year-end adjustment, together with a Compliance Certificate in
               the form of Exhibit B to this Loan Agreement duly completed and
               certified by the chief financial officer of Borrower.

                             (ii) each Corixa Fiscal Quarter, except for the
               fourth Corixa Fiscal Quarter of each Corixa Fiscal Year,
               internally-prepared consolidated balance sheets, statements of
               income and cash flow of Corixa as at the end of such period, all
               in reasonable detail and certified by the chief financial officer
               of Corixa that they (A) are complete and fairly present the
               financial condition of Corixa as at the dates indicated and the
               results of its operations and changes in its cash flow for the
               periods indicated, (B) disclose all liabilities that are required
               to be reflected or reserved against under GAAP, whether
               liquidated or unliquidated, fixed or contingent, and (C) have
               been prepared in accordance with GAAP, subject to changes
               resulting from audit and normal year-end adjustment, together
               with a Compliance Certificate in the form of Exhibit E to this
               Loan Agreement duly completed and certified by the chief
               financial officer of Corixa.

                      (b) ANNUAL AUDITED FINANCIAL STATEMENTS. As soon as
               practicable and in any event within ninety (90) days after the
               end of each Corixa Fiscal Year, consolidated balance sheets,
               statements of income and cash flow of Corixa as at the end of
               such Corixa Fiscal Year, all in reasonable detail and accompanied
               by a report thereon of independent public accountants of
               recognized national standing selected by Corixa and reasonably
               satisfactory to Lender, which report shall be unqualified and
               shall not contain an adverse opinion, or a disclaimer of opinion,
               shall not express doubts about the ability of Corixa to continue
               as a going concern, or be qualified or limited because of a
               restricted or limited examination by such accountant of any
               material portion of Corixa's records and shall state that such
               consolidated financial statements present fairly the financial
               position of Corixa as at the dates indicated and the results of
               operations and changes in financial position for the periods
               indicated in conformity

                                       4.
<PAGE>

               with GAAP applied on a basis consistent with prior years (except
               as otherwise stated therein) and that the examination by which
               such auditors in connection with such consolidated and
               consolidating financial statements has been made in accordance
               with generally accepted auditing standards, together with a
               Compliance Certificate in the form of Exhibit E to this Loan
               Agreement duly completed and certified by the chief financial
               officer of Corixa. The deliveries by Corixa pursuant to this
               Section 9(b) shall be accompanied by a supplemental financial
               statement schedule ("Coulter Annual Supplement") (A) containing
               unaudited balance sheets, statements of income and cash flow of
               Borrower as at the end of such Fiscal Year, (B) reviewed by such
               auditors, and (C) shall contain a statement by such auditors that
               the Coulter Annual Supplement presents fairly the financial
               position of Borrower as at the dates indicated and the results of
               operations and changes in financial position for the periods
               indicated in conformity with GAAP applied on a basis consistent
               with prior years (except as otherwise stated therein) and that
               the examination by which such auditors in connection with the
               Coulter Annual Supplement has been made in accordance with
               generally accepted accounting standards.

                      (c) CORIXA 10-Q. As soon as practicable and in any event
               within forty-five (45) days after and as of the end of each
               Corixa Fiscal Quarter, except for the fourth Corixa Fiscal
               Quarter of each Corixa Fiscal Year, a copy of the Form 10-Q, as
               required by the Securities Exchange Act of 1934, as amended,
               filed by Corixa with the United States Securities and Exchange
               Commission for such Corixa Fiscal Quarter.

               4. ADDITIONAL EXHIBIT A DEFINITIONS. The following definitions
are appended to Exhibit A to the Loan Agreement:

               "CORIXA" means Corixa Corporation, a Delaware corporation with
               its principal place of business at 1124 Columbia Street, Suite
               200, Seattle, Washington.

               "CORIXA FISCAL QUARTER" means each fiscal quarter of Corixa
               ending on March 31, June 30, September 30 and December 31.

               "CORIXA FISCAL YEAR" means each fiscal year of Corixa ending on
               December 31.

               5. AMENDED EXHIBIT A DEFINITIONS. The following definitions in
Exhibit A to the Loan Agreement are deleted and replaced with the following:

               "LIQUIDITY" means the value of Borrower's cash, cash equivalents
               and short--term investments (less restricted cash), plus one
               hundred percent (100.0%) of net trade receivables payable to
               Borrower by Lender, plus fifty percent (50.0%) of net trade
               receivables payable to Borrower by Persons other than Lender. For
               purposes of Sections 8(a)(ii) and 8(b)(ii), "Liquidity" shall
               mean the definition in the preceding sentence, but with all
               references to Borrower replaced by references to Corixa.

               "CONSOLIDATED TANGIBLE NET WORTH" means on a consolidated basis,
               as at any date of determination, the difference between
               Consolidated Tangible Assets and Consolidated Total Liabilities.
               For purposes of

                                       5.
<PAGE>

               Sections 8(c)(ii) and 8(d)(ii), "Consolidated Tangible Net Worth"
               shall mean the definition in the preceding sentence, but with all
               references to Borrower in the definitions of Consolidated Total
               Assets, Consolidated Tangible Assets and Consolidated Total
               Liabilities replaced by references to Corixa.

               "CONSOLIDATED TOTAL LIABILITIES" means on a consolidated basis,
               as at any date of determination, all liabilities of Borrower,
               determined and computed in accordance with GAAP. For purposes of
               Section 8(d)(ii), "Consolidated Total Liabilities" shall mean the
               definition in the preceding sentence, with all references to
               Borrower replaced by references to Corixa.

               "REMAINING MONTHS LIQUIDITY" means that ratio of (a) Liquidity to
               (b) the average monthly change in net cash from Borrower's (or
               Corixa's, as appropriate) operations during the prior three (3)
               month period; provided, however, that the impact of any
               manufacturing or annual campaigns shall be annualized for
               purposes hereof.

               6. EXHIBIT E. Attachment 1 hereto is appended to the Loan
Agreement as Exhibit E to the Loan Agreement.

               7. CONFIRMATION OF EFFECTIVE DATE. The parties hereto confirm and
acknowledge that the Effective Date is December 3, 1998.

               8. MISCELLANEOUS. All the terms, provisions and conditions of the
Loan Documents not amended by this Amendment shall be and remain the same and in
full force and effect.

               IN WITNESS WHEREOF, the parties hereto have executed this
Amendment on the Amendment Date.

COULTER PHARMACEUTICAL, INC.                 SMITHKLINE BEECHAM CORPORATION

By:  /s/ Greg Cox                            By:  Donald F. Parman
   --------------------------------             --------------------------------

Printed Name:  Greg Cox                      Printed Name:  /s/ Donald F. Parman
             ----------------------                       ----------------------

Title: Treasurer                             Title:  Vice President & Secretary

CORIXA CORPORATION

By: /s/ Greg Cox
   --------------------------------

Printed Name:  Greg Cox
             ----------------------

Title:  Treasurer

                                       6.
<PAGE>

                            Attachment 1 to Amendment

                             COMPLIANCE CERTIFICATE

           CORIXA CORPORATION (the "Company") hereby certifies that:

           This Compliance Certificate is furnished pursuant to SECTION 9 of the
Loan Agreement dated as of October 23, 1998 as amended on June 28, 2002 (the
"Loan Agreement") by and among Coulter Pharmaceuticals, Inc. and SmithKline
Beecham Corporation ("Lender"). Unless otherwise defined herein, the terms used
in this Certificate have the meanings given them in the Loan Agreement.

           As required by SECTIONS 9(a) and 9(b), as applicable, of the Loan
Agreement, consolidated financial statements of the Company for the
[year/quarter] ended _______________ (the "Financial Statements") prepared in
accordance with generally accepted accounting principles consistently applied
accompany this Compliance Certificate. The Financial Statements present fairly
the consolidated financial position of the Company as at the date thereof and
the consolidated results of operations of the Company for the period covered
thereby (subject only to normal recurring year-end adjustments).

           The figures set forth in SCHEDULE 1 attached hereto to be submitted
quarterly for determining compliance by the Company with the financial covenants
and certain other covenants contained in SECTION 8 of the Loan Agreement are
true and complete as of the date first written above.

           The activities of the Company during the period covered by the
Financial Statements have been reviewed by the chief financial officer or by
employees or agents under his/her immediate supervision. Based on such review,
to the best knowledge and belief of the chief financial officer, and as of the
date of this Compliance Certificate, no Event of Default has occurred.

           WITNESS my hand this _____ day of _______________, ____.

                                             CORIXA CORPORATION

                                             By:
                                                --------------------------------

                                             Printed Name:
                                                          ----------------------

                                             Title: Chief Financial Officer

                                       7.
<PAGE>

                             SCHEDULE 1 TO EXHIBIT E

                               FINANCIAL COVENANTS

A.      MINIMUM REMAINING MONTHS LIQUIDITY (SECTION 8.A.)

        REQUIRED: Until such time as Corixa maintains a Debt Service Coverage
                  Ratio of not less than 1.50:1.00 for two (2) consecutive
                  Corixa Fiscal Quarters, Corixa shall maintain Remaining Months
                  Liquidity of six (6) months.

ACTUAL:

<TABLE>
<S>                                                        <C>                  <C>
(1)     Cash                                               $___________

(2)     Cash equivalents and short-term investments        $___________
        (less restricted cash)

(3)     100% of net trade receivables payable by Lender    $___________

(4)     50% of net trade receivables payable by Persons    $___________
        other then Lender

(5)     Sum of Lines (1) - (4)                                                   $___________

(6)     Average monthly change in net cash from Corixa's   $___________
        operations during preceding three months

(7)     Line (5) divided by Line (6)                                              _________ MONTHS

                                                                                  In Compliance    Yes ?   No ?
</TABLE>

B.      MINIMUM DEBT SERVICE COVERAGE RATIO (SECTION 8.B.)

        REQUIRED: Corixa shall maintain a Debt Service Coverage Ratio of not
                  less than 1.50:1.00.

ACTUAL:

<TABLE>
<S>                                                        <C>
(1)     Net Profit                                         $___________

(2)     Depreciation                                       $___________
</TABLE>

                                       8.
<PAGE>

<TABLE>
<S>                                                        <C>                  <C>
(3)     Amortization and other non-cash charges            $___________

(4)     Sum of Lines (1) - (3)                                                   $___________

(5)     Current portion of long-term debt                  $___________

(6)     Line (4) divided by Line (5)                                             $___________

                                                                                In Compliance     Yes ?   No ?
</TABLE>

C.      MINIMUM CONSOLIDATED TANGIBLE NET WORTH (SECTION 8.C.)

        REQUIRED: Corixa on a consolidated basis shall not permit the
                  Consolidated Tangible Net Worth to be an amount less than
                  $18,000,000.

ACTUAL:

<TABLE>
<S>                                                        <C>                  <C>
(1)     Consolidated Total Assets                          $___________

(2)     Intangible assets                                  $___________

(3)     Consolidated Total Liabilities                     $___________

(4)     Total:  Line (1) minus Line (2) minus Line (3)                           $___________

                                                                                 In Compliance    Yes ?   No ?
</TABLE>

D.      CONSOLIDATED LEVERAGE RATIO (SECTION 8.D.)

        REQUIRED: Corixa on a consolidated basis shall not permit the
                  Consolidated Leverage Ratio to be greater than 1.00:1.00.

ACTUAL:

<TABLE>
<S>                                                        <C>                  <C>
(1)     Consolidated Total Liabilities                     $___________

(2)     Consolidated Tangible Assets                       $___________

(3)     Consolidated Liabilities                           $___________

(4)     Line (2) minus Line (3)                                                  $___________
</TABLE>

                                       9.
<PAGE>

<TABLE>
<S>                                                        <C>                  <C>
(5)     Line (1) divided by Line (4)                                             $      :1.00
                                                                                 ============

                                                                                In Compliance     Yes ?   No ?
</TABLE>

        WITNESS my hand on this Compliance Certificate on this _____ day of
_______________, ____.

                                             CORIXA CORPORATION

                                             By:
                                                --------------------------------

                                             Printed Name:
                                                          ----------------------

                                             Title:  Chief Financial Officer

                                      10.<PAGE>
Exhibit 10.1

                               RADISYS CORPORATION
                           5445 NE DAWSON CREEK DRIVE
                               HILLSBORO, OR 97124

                                  June 3, 2002

                            PERSONAL AND CONFIDENTIAL

Mr. Glenford J. Myers
3260 NW 112th Place
Portland, OR  97229

      Re:    Agreement

Dear Glen:

      This letter (the "Agreement") describes the compensation that RadiSys
Corporation ("RadiSys" or the "Company") will pay you in exchange for your
compliance with the noncompetition and nonsolicitation provisions in paragraph 2
of this Agreement.

      1. Compensation and Benefits. If you sign the enclosed copy of this
Agreement and the other conditions stated in paragraph 3, below, have been
satisfied, RadiSys will provide you with the following benefits:

            1.1 The sum of $516,785, payable one day following the date the
conditions described in the first sentence of paragraph 3 are satisfied.

            1.2 All of the outstanding stock options you received as an employee
of the Company will continue in full force and effect, and continue to vest,
until they expire in accordance with their terms. At that time you will have an
additional 30 days within which to exercise your vested options and any
unexercised options will expire at the end of those 30 days. This paragraph does
not apply to options you would receive as compensation as a director, which
options are subject to the same terms and conditions as apply to the other
directors. You understand all Incentive Stock Options you hold will
automatically convert to NonQualified Stock Options.

      2. Non-Solicitation and Non-Competition.

            2.1 Except as specified in the remainder of this paragraph, you
agree that you will not, at any time prior to June 15, 2004, directly or
indirectly (by yourself or in
<PAGE>
conjunction with any other person, company or organization), proactively recruit
away from RadiSys any employee. However, in the circumstance where any RadiSys
employee contacts you regarding possible employment the following shall instead
apply. With the employee's permission, you will notify the RadiSys CEO at least
seven days prior to extending an offer of employment to the employee. If you
cannot obtain the employee's permission, you agree not to extend an offer of
employment. If the RadiSys CEO notifies you within five days that there is
critical work in which the RadiSys employee is involved, you and the RadiSys CEO
will exert your best efforts to manage the transition to minimize the impact on
RadiSys' critical project.

            2.2 You further agree that you will not, without the written consent
of RadiSys, at any time prior to June 15, 2004, directly or indirectly, accept
employment or a consulting engagement with, or become an officer or director of,
any existing company that RadiSys considers to be a competitor of the Company.
Those companies listed in the "Competition" section of the latest RadiSys 10-K,
any business within Intel that makes products similar to the RadiSys products,
and any other company that you join where you are involved in creating a
business competitive to RadiSys are "competitors". You specifically acknowledge
and agree that the terms of this provision are reasonable in every respect and,
in particular, because of the competitive and specialized nature of the
Company's business, that the geographic scope is worldwide. These provisions are
in addition to your fiduciary responsibilities as a director of RadiSys to avoid
conflicts of interest. Until June 15, 2004, you agree to inform the Company if
you accept employment or a consulting engagement with, or become an officer or
director of, any entity that could reasonably be considered a competitor, so
that you and RadiSys can discuss whether the entity is considered to be a
competitor.

            2.3 RadiSys agrees that a company incorporated by you is not a
competitor, provided that none of the companies considered "competitors" under
paragraph 2.2 have a controlling interest. This designation of "not a
competitor" applies to any employment agreements of any current or previous
RadiSys employees. You agree to notify RadiSys if you start up any company
before June 15, 2004.

            2.4 The above provisions are to be enforced to the extent permitted
by applicable law. You agree that if any court of competent jurisdiction finds
that any of the above provisions are unreasonable as to territory, scope and/or
duration, the above provisions will remain valid for the territory, scope and/or
duration found by such court to be reasonable.

            2.5 You acknowledge that breach of the provisions in paragraph 2.1
and 2.2 will cause irreparable harm to the Company and if you fail to abide by
these obligations, the Company will be entitled to specific performance,
including immediate issuance of a temporary restraining order or preliminary
injunction enforcing the above restrictions, to judgment for damages caused by
your breach, and to other remedies

                                       2
<PAGE>
provided by applicable law. The rights and duties of the Company and you,
respectively, under this Agreement are in addition to, and not in lieu of, those
rights and duties afforded to and imposed upon you and the Company by law or at
equity.

      3. Other Conditions. Before the Company is obligated to pay you the
compensation and benefits described in paragraph 1, (a) you must have signed the
Release of Claims (the "Release") that is Exhibit A to the February 8, 2000
Executive Severance Agreement (the "Severance Agreement") and was given to you
on May 2, 2002, the day before your employment was terminated, and (b) the
seven-day revocation period must have expired without you revoking the Release.

      4. Term and Termination

            4.1 This Agreement will commence on the date of this Agreement and
will end on June 15, 2004, except for the provisions of paragraph 1.2, which
continue until your outstanding options expire.

            4.2 The Company may terminate this Agreement if you fail to comply
with the provisions of the Employee Confidential Information and Inventions
Agreement you signed on April 25, 1987 (the "Employee Agreement"), the Severance
Agreement (except for the provisions of Section 8 of the Severance Agreement
requiring you to resign as a member of the board of directors of RadiSys), the
Release or paragraph 2, above, by giving you written notice of that failure and,
if the failure is curable, 5 business days to cure the failure.

      5. Miscellaneous.

            5.1 This Agreement contains the entire agreement between you and
RadiSys concerning the subject matters discussed in this Agreement and
supersedes any other discussions, agreements, representations or warranties of
any kind, whether written or oral about such subject matter, except for the
Employee Agreement, the Severance Agreement or the Release, but including the
drafts of the Consulting and Separation Agreement previously presented to you in
May 2002. Any modification of this Agreement will be effective only if in
writing and signed by each party or its duly authorized representative. If for
any reason any provision of this Agreement is held invalid in whole or in part,
the invalidity will not affect the remainder of this Agreement. This Agreement
is solely for the benefit of you and the Company, and there are no third party
beneficiaries of this Agreement.

            5.2 The rights and obligations of the parties under this Agreement
will in all respects be governed by the laws of the state of Oregon, and any
claim relating to this Agreement will be brought only in the state or federal
courts of Oregon.

            5.3 Your employment terminated on May 3, 2002 and therefore you are
not currently an employee of the Company. Nothing in this Agreement shall be
interpreted or construed as creating or establishing the relationship of
employer and employee between the

                                       3
<PAGE>

Company and you. You will be responsible for payment of, and will indemnify and
hold the Company harmless with respect to, all local, state and federal taxes
and assessments associated with or resulting from the payments received by you
under this Agreement, including any interest and penalties.

      6. Certain Attorneys' Fees. Upon satisfaction of the other conditions
specified in paragraph 3, and within 30 days after the date of the invoices you
provide to the Company, RadiSys will pay the actual and reasonable attorneys'
fees, not to exceed $20,000, of Susan M. Hammer, Attorney at Law and Tonkon Torp
LLP you incurred in connection with the negotiation of this Agreement.

      The compensation described in this Agreement is in addition to the
$509,521 plus estimated COBRA payments for 12 months compensation paid or due to
you under the Severance Agreement when you comply with the terms of the
Severance Agreement. You agree to waive the 45-day consideration period under
the Severance Agreement.

      To reflect your voluntary acceptance and agreement with these terms,
please sign and return the enclosed copy of this Agreement, and the signed
Release, on or before June 17, 2002.

                                       Sincerely,

                                       RADISYS CORPORATION

                                       By: /s/ CARL W. NEUN
                                           -------------------------------------
                                           Carl W. Neun
                                           Acting Chairman of the Board

ACKNOWLEDGMENT AND AGREEMENT:

I have read this Agreement and voluntarily enter into this Agreement after
careful consideration.

/s/ GLENFORD J. MYERS                      June 4, 2002
---------------------------                -------------------------------------
Glenford J. Myers                          Date

                                       4

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