<PAGE>

                                                                   EXHIBIT 10.1


                                   AMENDMENT
                                       TO
                          LOAN AND SECURITY AGREEMENT


      This Amendment to Loan and Security Agreement is entered into as of April
9, 1997 (this "Amendment"), by and between Silicon Valley Bank ("Bank") and
Quest Electronic Hardware, Inc. ("Borrower").


                                    RECITALS
 
      Borrower and Bank are parties to that certain Loan and Security Agreement
dated as of March 31, 1995, as amended from time to time, including, without
limitation, the Amendment No. 1 to Loan and Security Agreement dated May 31,
1995, the Amendment No. 1 to Loan and Security Agreement dated November 16,
1995, the Amendment to Loan and Security Agreement dated March 31, 1996, and
the Amendment to Loan and Security Agreement dated September 30, 1996
(collectively, the "Agreement"). The parties desire to amend the Agreement in
accordance with the terms of this Amendment.

      NOW, THEREFORE, the parties agree as follows:

      1.   The  following  definitions  in  Section  1.1 are  hereby  amended 
           to read as follows:

           "Committed Line" means Three Million Dollars ($3,000,000).

           "Guarantor" means Questron Technology, Inc.

            "Guaranty"  means  the  Unconditional  Guaranty  dated  September 
            26,  1996 executed by Guarantor in favor of Bank.

           "Letters of Credit" means a letter of credit or similar undertaking
            issued by Bank pursuant to Section 2.1.2.

            "Revolving facility Maturity Date" means March 30, 1999, as
            extended from time to time in Bank's sole discretion pursuant to
            Section 2.1, provided that the Revolving Facility Maturity Date
            shall be March 30, 1998 if Bank gives Borrower notice not later
            than December 31, 1997 that Borrower has not complied with the
            terms of the Agreement to Bank's reasonable satisfaction.

           "Total Liabilities" means as of any applicable date, any date as of
            which the amount thereof shall be determined, all obligations that
            should, in accordance with GAAP be classified as liabilities on the
            consolidated balance sheet of Borrower, including in any event all
            Indebtedness.
<PAGE>

      2.    The first paragraph of Section 2.1 is amended to read as follows:

               2 .1 Advances. Subject to and upon the terms and conditions of
            this Agreement, Bank agrees to make Advances to Borrower in an
            aggregate amount not to exceed (a) the lesser of the Committed Line
            or the Borrowing Base, minus (b) the face amount of all outstanding
            Letters of Credit (including drawn but unreimbursed Letters of
            Credit). For purposes of this Agreement, "Borrowing Base" shall
            mean an amount equal to (I) seventy-five percent (75%) of Eligible
            Accounts plus (ii) (x) if the value of Borrower's total Inventory
            is equal to or greater than Four Million Two Hundred Fifty Thousand
            Dollars ($4,250,000), then the lesser of twenty-five percent (25%)
            of the value of Borrower's Eligible Inventory or One Million
            Dollars ($1,000,000), or (y) if the value of Borrower's total
            Inventory is less than Four Million Two Hundred Fifty Thousand
            Dollars ($4,250,000) but greater than or equal to Two Million Five
            Hundred Thousand Dollars ($2,500,000), then the lesser of
            twenty-five percent (25%) of the value of Borrower's Eligible
            Inventory or Seven Hundred Fifty Thousand Dollars ($750,000), or
            (z) if the value of Borrower's total Inventory is less than Two
            Million Five Hundred Thousand Dollars ($2,500,000), then the lesser
            of twenty-five percent (25%) of the value of Borrower's Eligible
            Inventory or Five Hundred Thousand Dollars ($500,000). Subject to
            the terms and conditions of this Agreement, amounts borrowed
            pursuant to this Section 2.1 may be repaid and reborrowed at any
            time prior to the Revolving Facility Maturity Date.

      3.    The Section numbers set forth in Amendment No. 1 to Loan and 
Security Agreement dated May 31, 1995, for the sections titled "Letters of
Credit" and "Letter of Credit Reimbursement; Reserve" shall hereby be amended
to Section 2.1.2 for the "Letters of Credit" and Section 2.1.3 for the "Letter
of Credit Reimbursement; Reserve."

      4.    Sections 6.9, 6.10 and 6.12 are hereby amended to read as follows:

            6.9 Debt-Tangible Net Worth. Borrower shall maintain, as of the
      last day of each calendar month, commencing with the calendar month
      ending on March 31, 1997, a ratio of Total Liabilities less Subordinated
      Debt to Tangible Net Worth plus Subordinated Debt of not more than 1.25
      to 1.0.

            6.10 Tangible Net Worth. Borrower shall maintain, as of the last
      day of each calendar month, commencing with the calendar month ending on
      March 31, 1997, a Tangible Net Worth of not less than Four Million Five
      Hundred Thousand Dollars ($4,500,000), plus fifty percent (50%) of
      Borrower's net income in the subsequent years of this Agreement,

            6.12 Debt Service Coverage. Borrower shall maintain, as of the last
      day of each calendar month, commencing with the calendar month ending on
      March 31, 1997, a Debt Service Coverage Ratio of at least 1.75 to 1.0 for
      each month from March through November, and at least 1.50 to 1.0 for each
      month from December through February.

      5.    Section 6.11 is hereby deleted in its entirety.
<PAGE>

      6.    The borrowing base certificate and the compliance certificate
attached to the Agreement as Exhibit C and Exhibit D, respectively, are hereby
replaced by Exhibit "C" and Exhibit "D", respectively, attached hereto.

      7.    In order to secure prompt repayment of any and all Obligations and
in order to secure prompt performance by Borrower of each of its covenants and
duties under the Loan Documents, Borrower hereby pledges to Bank all the shares
of capital stock of Comp Ware, Inc. which Borrower now owns or hereafter
acquires an interest, by executing concurrently herewith a Stock Pledge
Agreement and taking such further actions requested by Bank that are necessary
to effect such pledge.

      8.    As a condition to the effectiveness of this Amendment, Borrower
shall pay Bank a per annum fee of Twenty Two Thousand Five Hundred Dollars
($22,500), plus a cost of capital fee of Twenty Five Thousand Dollars
($25,000), plus all Bank Expenses (including reasonable attorneys' fees)
incurred through the date of this Amendment, which fees and expenses become
nonrefundable and fully earned on the date of this Amendment.

      9.    The effectiveness of this Amendment is subject to the condition
precedent that Bank shall have received, in form and substance satisfactory to
Bank, the following:

            a. this Amendment duly executed by Borrower;

            b. a certificate of secretary of Borrower with respect to
incumbency and resolutions authorizing the execution and delivery of this
Amendment;

            c. the Stock Pledge Agreement duly executed by Borrower;

            d. the Affirmation of Guaranty duly executed by Questron
Technology, Inc.;

            e. the Affirmation of Stock Pledge Agreement duly executed by
Questron Technology, Inc.;

            f. evidence of corporate authority and incumbency as Bank shall
require from all third parties entering into agreements in connection with this
Amendment;

            g. payment of the fees and Bank Expenses then due specified in
Paragraph 6 hereof; and

            h. such other documents, and completion of such other matters, as
Bank may reasonably deem necessary or appropriate.

      10.   Unless other-wise defined, all capitalized terms in this Amendment
shall be as defined in the Agreement. Except as amended, the Agreement remains
in full force and effect.

      11.   Borrower represents and warrants that the Representations and
Warranties contained in the Agreement are true and correct as of the date of
this Amendment (except such representations and warranties to be expressly true
as of a specific date), and that no Event of Default has occurred and is
continuing. 

<PAGE>

      12.   This Amendment may be executed in two or more counterparts, each of
which shall be deemed an original, but all of which together shall constitute
one instrument.

      IN WITNESS WHEREOF, the undersigned have executed this Amendment as of
the first date above written.

                                              QUEST ELECTRONIC HARDWARE, INC.,
                                              a Delaware corporation

                                              By:  Dominic A. Polimeni
                                                 -----------------------------
                                              Title:  Chairman and CEO


                                              SILICON VALLEY BANK

                                              By:  Julie Schneider
                                                 -----------------------------
                                              Asst. Vice-President
     

<PAGE>


                                   EXHIBIT C
                           BORROWING BASE CERTIFICATE

-------------------------------------------------------------------------------
Borrower: Quest Electronic Hardware, Inc.       Lender:   Silicon Valley Bank

Commitment Amount: $3,000,000.00
-------------------------------------------------------------------------------
<TABLE>
<S>                                                                      <C>             <C>                                  
ACCOUNTS RECEIVABLE                                                      
        1.   Accounts Receivable Book Value as of                                         $______________
        2.   Additions (please explain on reverse)                                        $______________
        3.   TOTAL ACCOUNTS RECEIVABLE                                                    $______________
                                                                         
ACCOUNTS RECEIVABLE DEDUCTIONS (without duplication)                     
        4.   Amounts over 90 days due                                     $______________
        5.   Balance of 50% over 90 day accounts                          $______________
        6.   Concentration Limits                                         $______________
        7.   Foreign Accounts                                             $______________
        8.   Governmental Accounts                                        $______________
        9.   Contra Accounts                                              $______________
        10.  Promotion or Demo Accounts                                   $______________
        11.  Intercompany/Employee Accounts                               $______________
        12.  Other (please explain on reverse)                            $______________
        13.  TOTAL ACCOUNTS RECEIVABLE DEDUCTIONS                                         $______________
        14.  Eligible Accounts  (#3 minus #13)                                            $______________
        15.  LOAN VALUE OF ACCOUNTS (75% of #14)                                          $______________
                                                                         
INVENTORY                                                                
   16.  Value of Inventory                                                                $______________
   17.  LOAN VALUE OF INVENTORY (lesser of (a) 25% of #16,               
        (b)  $1,000,000 if #16 is greater than $4,250,000,               
        (c)  $750,000 if #16 is greater than $2,500,000 but less
             $4,250,000, or (d) $500,000 if #16 is less than $2,500,000                   $______________
                                                                                        
BALANCES                                                                                
        18.  Maximum Loan Amount                                                          $  3,000,000.00
        19.  Total Funds Available [Lesser of #18 or (#15 plus #17)]                      $______________
        20.  Present balance owing on Line of Credit                                      $______________
        21.  Face amount of all outstanding Letters of Credit                             $______________
        22.  RESERVE POSITION (#19 minus #20 minus 21)                                    $______________

                                                                                        
The undersigned represents and warrants that the foregoing is true, complete                 
and correct,, and that the information reflected in this Borrowing Base                      
Certificate complies with the representations and warranties set forth in the                
Loan and Security Agreement between the undersigned and Silicon Valley Bank.                 
                                                                                             
                                             ---------------------------------               
COMMENTS:                                    |                               |               
                                             | BANK USE ONLY                 |               
                                             | -------------                 |               
                                             | Rec'd By:                     |               
                                             |          -------------------- |               
Quest Electronic Hardware, Inc.              |              Auth. Signer     |               
                                             |                               |               
                                             | Date:                         |               
                                             |      ------------------------ |               
                                             |                               |               
By:                                          | Verified:                     |    
   ----------------------------              |          -------------------- |
        Authorized Signer                    |              Auth. Signer     |
                                             |                               |
                                             | Date:                         |
                                             |      ------------------------ |
                                             |                               |
                                             ---------------------------------

</TABLE>
<PAGE>


                                   EXHIBIT D
                             COMPLIANCE CERTIFICATE


   TO:     SILICON VALLEY BANK

   FROM:   QUEST ELECTRONIC HARDWARE, INC.

      The undersigned authorized officer of Quest Electronic Hardware, Inc.
hereby certifies that in accordance with the terms and conditions of the Loan
and Security Agreement between Borrower and Bank (the "Agreement"), (i)
Borrower is in complete compliance for the period ending ____________________ 
with all required covenants except as noted and (ii) all representations and 
warranties of Borrower stated in the Agreement are true and correct in all 
material respects as of the date hereof. Attached herewith are the required 
documents supporting the above certification. The Officer further certifies 
that these are prepared in accordance with Generally Accepted Accounting 
Principles (GAAP) and are consistently applied from one period to the next 
except as explained in an accompanying letter or footnotes.

                 PLEASE INDICATE COMPLIANCE STATUS BY CIRCLING
                         YES/NO UNDER "COMPLIES"COLUMN.
<TABLE>
REPORTING COVENANT                 REQUIRED                            COMPLIES
------------------                 --------                            --------
<S>                                <C>                                 <C>
   Monthly financial statements      Monthly within 30 days            Yes   No
   Annual (CPA Audited)              FYE within 90 days                Yes   No
   A/R & A/P Agings                  Monthly within 20 days            Yes   No
   A/R Audit                         Initial and Semi-Annual           Yes   No

FINANCIAL COVENANT                 REQUIRED            ACTUAL          COMPLIES
------------------                 --------            ------          --------
   Maintain on a Monthly Basis:
    Minimum Quick Ratio             0.50:1.0             :1.0          Yes   No
    Minimum Tangible Net Worth      $4,500,000 plus    $               Yes   No
                                    50% of Net Income
    Maximum Debt/Tangible Net Worth 1.25:1.0             :1.0          Yes   No
    Debt Service Coverage           1.75:1.0 for March   :1.0          Yes   No
                                    through Nov.;
                                    1.50:1.0 for Dec.
                                    through Feb.


COMMENTS REGARDING EXCEPTIONS: See Attached.
                                              ---------------------------------   
                                              |                               |  
                                              | BANK USE ONLY                 |  
Sincerely,                                    | -------------                 |   
                                              | Received by:                  |   
----------------------------------            |             ----------------- |  
SIGNATURE                                     |             AUTHORIZED SIGNER |  
                                              |                               |  
----------------------------------            | Date:                         |  
TITLE                                         |      ------------------------ |   
                                              |                               |  
----------------------------------            | Verified:                     |   
DATE                                          |          -------------------- |   
                                              |           AUTHORIZED SIGNER   |  
                                              |                               |   
                                              | Date:                         |   
                                              |      ------------------------ |  
                                              | Compliance Status:  Yes   No  |  
                                              ---------------------------------  
                                                                                       
</TABLE>