Document:

<PAGE>   1

                                                                     EXHIBIT 4.2

                   FIFTH RESTATED CERTIFICATE OF INCORPORATION
                                       OF
                                 CIMA LABS INC.,
                                   AS AMENDED

             (GIVING EFFECT TO ALL AMENDMENTS THROUGH JUNE 1, 2001)

                                    ARTICLE 1
                                      NAME

         The name of the Corporation shall be CIMA LABS INC.

                                    ARTICLE 2
                           BUSINESS OR PURPOSES TO BE
                              CONDUCTED OR PROMOTED

         The purpose of the Corporation is to engage in any lawful act or
activity for which corporations may be organized under the General Corporation
Law of Delaware.

                                    ARTICLE 3
                     REGISTERED OFFICE AND REGISTERED AGENT

         The registered office of the Corporation in Delaware is 1209 Orange
Street Wilmington, New Castle County, Delaware 19801, and the name of its
registered agent is The Corporation Trust Company, the business office of which
is identical with the registered office of the Corporation.

                                    ARTICLE 4
                                  CAPITAL STOCK

         4.1) Authorized Capital Stock. The aggregate number of shares of stock
which the Corporation is authorized to issue is 65,000,000 shares, par value
$.01 per share, of which 60,000,000 shares shall be designated common stock (the
"Common Stock"), and 5,000,000 shall be undesignated preferred stock (the
"Undesignated Preferred Stock"). Each share of Common Stock of the Corporation
shall be entitled to one vote on all matters on which such stock is entitled to
vote.

         4.2) Authority Relative to Undesignated Preferred Stock. Authority is
hereby expressly vested in the Board of Directors of the Corporation, subject to
the provisions of this Article 4 and to limitations prescribed by law, to
authorize the issuance from time to time of one or more series of Undesignated
Preferred Stock and, with respect to each such series, to determine or fix, by
resolution or resolutions adopted by the affirmative vote of a majority of the
whole Board of Directors providing for the issue of such series, the voting
powers, full or limited, any, of the shares of such series and the designations,
preferences and relative, participating, optional or other special rights and
the qualifications, limitations or restrictions thereof, including, without
limitation, the determination or fixing of the rates of and terms and conditions
upon which any dividends shall be payable on such series, any terms under or
conditions on which the shares of such series may be redeemed, any provision
made for the conversion or exchange of the shares of such series for shares of
any other class or classes or of any other series of the same or any other class
or classes of the Corporation's capital stock, and any rights of the holders of
the shares of such series upon the voluntary or involuntary liquidation,
dissolution or winding up of the Corporation.

                                   ARTICLE 5
                     BUSINESS AND AFFAIRS OF THE CORPORATION

         5.1) Amendment of Bylaws. In furtherance, and not in limitation of the
powers conferred by statute, the Board of Directors is expressly authorized to
make, amend, alter, change, add to or repeal the Bylaws of the Corporation,
without any action on the part of the stockholders. The Bylaws made by the
directors may be amended, altered, changed, added to or repealed by the
stockholders. Any specific provision in the Bylaws regarding amendment thereof
shall be controlling.

         5.2) Director Liability. To the fullest extent permitted by the
Delaware General Corporation Law as the same exists or may hereafter be amended,
a director of the Corporation shall not be liable to the Corporation or its
stockholders for monetary damages for breach of fiduciary duty as a director.
Any repeal or modification of this provision shall not adversely affect any
right or protection of a director of the Corporation existing at the time of
such repeal or modification.<PAGE>   1

                                                                     EXHIBIT 10R

                                    CORRECTED
                                  AMENDMENT TO
                        1992 EMPLOYEE STOCK PURCHASE PLAN
                          (AS AMENDED THROUGH MAY 1999)

     This document is an amendment to the 1992 Employee Stock Purchase Plan of
Computer Network Technology Corporation (the "Company") as amended through May,
1999.

                                   WITNESSETH:

     WHEREAS, the Company has previously adopted the 1992 Employee Stock
Purchase Plan (the "Plan"); and

     WHEREAS, the Plan has previously been amended; and

     WHEREAS, Section 16 of the Plan permits the Board of Directors to amend the
Plan; and

     WHEREAS, at its March 19, 2001 meeting the Board of Directors approved
amendments to the Plan; and

     WHEREAS, this document corrects the amendment previously executed in
connection with the amendments approved at the March 19, 2001 meeting.

     NOW, THEREFORE, in consideration of the premises, the 1992 Employee Stock
Purchase Plan (as amended through May 1999) is further amended effective for
Purchase Periods beginning on or after June 1, 2001 as follows:

     1. Section 2.1 is amended by deleting subsection (b) and inserting in lieu
thereof the following: "(b) Intentionally omitted."

     2. Section 2.1 is further amended deleting subsection (h) and inserting in
lieu thereof the following:

     (h) "Compensation" means the wages, tips and other compensation paid to a
Participant by the Company or an Affiliate and reportable in the box designated
"wages, tips, other compensation" on Treasury Form W-2 (or any comparable
successor box or form) for the calendar year but determined without regard to
any rules that limit the remuneration included in wages based on the nature or
location of the employment or the services performed (such as the exception for
agricultural labor in section 3401(a)(2) of the Code). Compensation shall be
determined on a cash basis. Provided, however, that Compensation shall include
elective contributions made by the Company or an Affiliate on behalf of a
Participant that are not includible in gross income under sections 125,
402(a)(8), 402(h), 403(b), 414(h)(2) and 457 of the Code including elective
contributions authorized by a Participant under a cafeteria plan or any other
qualified cash or deferred arrangement under section 401(k) of the Code.
Provided, further that Compensation shall exclude all of the following: (i)
reimbursements or other expense allowances including foreign service allowances,
station allowances, foreign tax equalization payment and other similar payments;
(ii) welfare and fringe benefits (both cash and noncash) including third-party
sick pay (i.e., short-term and long-term disability insurance benefits), income
imputed from insurance coverages and premiums, employee discounts and other
similar amounts, payments for vacation or sick leave accrued but not taken,
final payments on account of termination of employment (i.e., severance
payments) and settlement for accrued but unused vacation and sick leave; (iii)
moving expenses; (iv) deferred compensation (both when deferred and when
received); (v) the Saturday Night Stay-over Program; and (vi) any income related
to the exercise of nonqualified stock options, the sale of stock within eighteen
months of receipt under the Employee Stock Purchase Plan, the stock options
received pursuant to any Company or Affiliate stock option plan, or the vesting
of restricted stock under any Company or Affiliate stock award plan.

<PAGE>   2

     3. Section 2.1 is further amended by deleting subsection (j) and inserting
in lieu thereof the following: "(j) Intentionally omitted."

     4. Section 6.2 is amended by deleting the second sentence of said Section
and inserting in lieu thereof the following: "An Eligible Employee may elect
withholding from Compensation in any whole percentage from 0% to 10%."

     5. Section 6.2 is further amended by substituting the dollar and amount of
"$5,000" for the dollar and amount of "$2,500" where they appear in the third
sentence of said Section.

     6. Except as amended hereby, the Plan shall continue in full force and
effect.

     IN WITNESS WHEREOF, the undersigned has executed this Amendment as of the
19th day of March, 2001.

                                       COMPUTER NETWORK TECHNOLOGY CORPORATION

                                       By: /s/Gregory T. Barnum
                                          --------------------------------------
                                          Gregory T. Barnum
                                          Its Chief Financial Officer<PAGE>   1

                                                                    EXHIBIT 10.1

                    EIGHTH AMENDMENT TO AMENDED AND RESTATED
                         REVOLVING CREDIT, TERM LOAN AND
                           GOLD CONSIGNMENT AGREEMENT

         Eighth Amendment, dated as of April 27, 2001 (the "Amendment"),
amending that certain Amended and Restated Revolving Credit, Term Loan and Gold
Consignment Agreement dated as of September 10, 1998 (as amended and in effect
from time to time, the "Credit Agreement"), by and among (a) Whitehall
Jewellers, Inc. (f/k/a Marks Bros. Jewelers, Inc.), a Delaware corporation (the
"Borrower"); (b) Fleet Capital Corporation, LaSalle Bank National Association
(f/k/a LaSalle National Bank), ABN AMRO Bank N.V. and the other lending
institutions which are now parties thereto (collectively, the "Banks"); and (c)
Fleet Capital Corporation, as Collateral Agent, Administrative Agent and
Syndication Agent for the Agents as herein defined and the Banks and LaSalle
Bank National Association and ABN AMRO Bank N.V., each as Syndication Agent for
the Agents and the Banks (the Collateral Agent, Administrative Agent and
Syndication Agents are collectively referred to as the "Agents"). Capitalized
terms used herein and which are not otherwise defined shall have the respective
meanings ascribed thereto in the Credit Agreement.

         WHEREAS, the Borrower and the Banks have agreed to modify certain terms
and conditions of the Credit Agreement as specifically set forth in this
Amendment;

         NOW, THEREFORE, in consideration of the premises and the mutual
agreements contained herein and for other good and valuable consideration, the
receipt and sufficiency of which are hereby acknowledged, the parties hereto
hereby agree as follows:

         SECTION 1.      AMENDMENTS TO CREDIT AGREEMENT.

         (a)      Section 1.1 of the Credit Agreement is hereby amended by
inserting the following new definitions in the appropriate alphabetical
sequence:

                  "Eighth Amendment Effective Date.  April 27, 2001."

                  "Term Loan Reserve Amount. As at any date of determination, an
         amount which is equal to the sum of the next four payments of principal
         scheduled to be repaid in accordance with ss.3.3 of the Credit
         Agreement, provided, however, that if as of the end of any fiscal year,
         the ratio of Consolidated Operating Cash Flow for such fiscal year to
         Consolidated Total Debt Service for such fiscal year is greater than or
         equal to 1.25:1.00, then the Term Loan Reserve Amount shall be equal to
         $0."

         (b)      Section 1.1 of the Credit Agreement is hereby further amended
by inserting after the words "plus (e) the Discretionary Amount" contained in
the definition of "Borrowing Base", the words "; minus (f) the Term Loan
Reserve Amount".
<PAGE>   2

                                      -2-

         (c)      Section 7.22 of the Credit Agreement is hereby amended by
deleting the sentence following the table contained therein in its entirety and
replacing it with the following new sentence:

         "Notwithstanding any provision to the contrary contained in this Credit
         Agreement, for Loans and Commitment Fees payable during the period
         commencing on the Eighth Amendment Effective Date through the date
         immediately preceding the first Performance Adjustment Date to occur
         after January 31, 2002, the Base Rate Applicable Margin for Revolving
         Credit Loans and Swing Loans shall not be less than 0.00%, the Base
         Rate Applicable Margin for the Term Loan shall not be less than 0.50%,
         the Eurodollar Applicable Margin for Revolving Credit Loans shall not
         be less than 2.000%, the Eurodollar Applicable Margin for the Term Loan
         shall not be less than 2.500% and the Commitment Fee Rate shall not be
         less than 0.500%."

         (d)      Section 11.3(f) of the Credit Agreement is hereby deleted in
its entirety and replaced with the following:

         "(f)      Intentionally omitted."

         (e)      Section 11.5.1 of the Credit Agreement is hereby amended by
deleting the second sentence thereof in its entirety and replacing it with the
following new sentence:

         "The Borrower will not, and will not permit any of its Subsidiaries to,
         agree to or effect any asset acquisition or stock acquisition without
         the prior written consent of the Majority Banks."

         (f)      Section 12.1 of the Credit Agreement is hereby amended by
deleting the table contained therein in its entirety and replacing it with the
following new table:

                            Period                          Ratio
                            ------                          -----
                    2/1/01 through 4/30/01                3.50:1.00
                   5/1/01 through 10/31/01                3.75:1.00
                   11/1/01 through 1/31/02                3.25:1.00
                    2/1/02 through 7/31/02                3.00:1.00
                   8/1/02 through 10/31/02                2.75:1.00
                   11/1/02 through 1/31/03                2.50:1.00
                          Thereafter                      2.25:1.00

         (g) Section 12.2 of the Credit Agreement is hereby amended by deleting
the table contained therein in its entirety and replacing it with the following
new table:

                         Fiscal Year                         Amount
                         -----------                         ------
                    2/1/01 through 1/31/02                $15,000,000
                    2/1/02 through 1/31/03                $20,000,000
                    2/1/03 through 1/31/04                $23,200,000

<PAGE>   3

                                      -3-

         (h)      Section 12.3 of the Credit Agreement is hereby amended by
deleting it in its entirety and replacing it with the following:

                  "12.3. DEBT SERVICE COVERAGE. The Borrower will not permit the
         ratio of Consolidated Operating Cash Flow for any fiscal year to
         Consolidated Total Debt Service for such fiscal year, to be less than
         1.00:1.00."

         (i)      Section 12.4 of the Credit Agreement is hereby amended by
deleting it in its entirety and replacing it with the following:

                  "12.4. FIXED CHARGE COVERAGE RATIO. The Borrower will not
         permit, for any period of four consecutive fiscal quarters ending on
         any date during any period set forth in the table below, the ratio of
         (a) the sum of (i) Consolidated EBITDA plus (ii) Consolidated Minimum
         Store Rent for such period to (b) the sum of (i) Consolidated Minimum
         Store Rent for such period plus (ii) Consolidated Cash Interest Expense
         for such period, to be less than the ratio set forth opposite such date
         in such table:

                            Period                            Ratio
                            ------                            -----
                   2/1/01 through 10/31/01                  1.50:1.00
                   11/1/01 through 10/31/02                 1.70:1.00
                          Thereafter                        1.80:1.00

         (j) Section 12.5 of the Credit Agreement is hereby amended by deleting
the table contained therein in its entirety and replacing it with the following
new table:

                            Period                             Amount
                            ------                             ------
                    2/1/01 through 7/31/01                  $26,000,000
                   8/1/01 through 10/31/01                  $26,500,000
                   11/1/01 through 7/31/02                  $29,000,000
                   8/1/02 through 10/31/02                  $30,000,000
                   11/1/02 through 1/31/03                  $34,000,000
                    2/1/03 through 4/30/03                  $35,000,000
                    5/1/03 through 7/31/03                  $36,500,000
                   8/1/03 through 10/31/03                  $37,000,000
                    11/1/03 and thereafter                  $38,500,000

         SECTION 2. CONDITIONS TO EFFECTIVENESS. This Amendment shall not
become effective until the Administrative Agent receives (a) a counterpart of
this Amendment, executed by each of the Borrower, the Agents and the Majority
Banks, and (b) an amendment fee in an amount equal to $250,000, such amendment
fee to be allocated among the Banks (the "Consenting Banks") which consent to
this Amendment on or prior to April 27, 2001 in accordance with their respective
Commitment Percentages, with the remainder (if any) to be allocated (i) to any
Bank which subsequently consents

<PAGE>   4
                                      -4-

to this Amendment in accordance with its Commitment Percentage, or (ii) pro rata
among the Consenting Banks, such determination to be made in the sole discretion
of the Administrative Agent.

         SECTION 3. REPRESENTATIONS AND WARRANTIES. The representations and
warranties of the Borrower contained in the Credit Agreement (including, without
limitation, the representation regarding litigation contained in Section 9.7
thereof) were true and correct when made and continue to be true and correct on
and as of the date hereof as if made on the date hereof except to the extent of
changes resulting from transactions contemplated or permitted by the Credit
Agreement and to the extent that such representations and warranties relate
expressly to an earlier date. No Default or Event of Default has occurred and is
continuing.

         SECTION 4. RATIFICATION, ETC. Except as expressly amended hereby, the
Credit Agreement and all documents, instruments and agreements related thereto,
including, but not limited to the Security Documents, are hereby ratified and
confirmed in all respects and shall continue in full force and effect. The
Credit Agreement and this Amendment shall be read and construed as a single
agreement. All references in the Credit Agreement or any related agreement or
instrument to the Credit Agreement shall hereafter refer to the Credit Agreement
as amended hereby.

         SECTION 5.  NO WAIVER. Nothing contained herein shall constitute a
waiver of, impair or otherwise affect any Obligations, any other obligation of
the Borrower or any rights of the Agents or the Banks consequent thereon.

         SECTION 6.  COUNTERPARTS. This Amendment may be executed in one or more
counterparts,  each of which shall be deemed an original but which together
shall constitute one and the same instrument.

         SECTION 7.  GOVERNING LAW. THIS AMENDMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE  WITH, THE LAWS OF THE COMMONWEALTH OF MASSACHUSETTS
(WITHOUT REFERENCE TO CONFLICT OF LAWS).

<PAGE>   5

         IN WITNESS WHEREOF, the parties hereto have executed this Amendment as
a document under seal as of the date first above written.

                                   WHITEHALL JEWELLERS, INC. (f/k/a
                                   Marks Bros. Jewelers, Inc.)

                                   By: /s/Jon H. Browne
                                          Name: Jon  H. Browne
                                          Title:  Executive Vice President

                                   FLEET CAPITAL CORPORATION,
                                   individually and as Administrative Agent,
                                   as Collateral Agent and as Syndication
                                   Agent

                                   By: /s/ Art Pesevanto
                                          Name: Arthur A. Pesavento
                                          Title:  Vice President

                                   LASALLE BANK NATIONAL ASSOCIATION,
                                   individually and as Syndication Agent

                                   By: /s/ Bernardo Lacayo
                                          Name: Bernardo Lacayo
                                          Title: Assistant Vice President

                                   ABN AMRO BANK N.V., individually and as
                                   Syndication Agent

                                   By: /s/ Jeffery Sarfaty
                                          Name: Jeffery Sarfaty
                                          Title: Vice President

                                   By: /s/ Ned Koppelson
                                          Name: Ned Koppelson
                                          Title: Vice President

                                   THE CHASE MANHATTAN BANK

                                   By: /s/ Irene B. Spector
                                          Name: Irene B. Spector
                                          Title: Vice President
<PAGE>   6

                                   BANK OF AMERICA, N.A.

                                   By:
                                       --------------------------------------
                                          Name:
                                          Title:

                                   SOVEREIGN BANK NEW ENGLAND

                                   By: /s/ Patricia Malerba
                                          Name: Particia Malerba
                                          Title:  Vice President

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