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                                                                   EXHIBIT 10.9

                        CONDITIONAL GUARANTY OF PAYMENT

         THIS GUARANTY is made as of the 29th day of November, 1999 by
INTELLIGENT SYSTEMS CORPORATION, INC. ("Guarantor") in favor of each holder of
a Class 7 Allowed Claim whose name is listed in Exhibit 1.03 to that certain
First Amendment to Amended and Restated Plan of Reorganization filed on
November 15, 1999 in the Chapter 11 case of In re Humansoft. L.L.C. which is
pending in the United States Bankruptcy Court for the Northern District of
Georgia, Atlanta Division and is case number 98-77964 ("Class 7 Creditor").

                      ARTICLE I - BACKGROUND AND AGREEMENT

         1.01 Background. Humansoft, L.L.C., debtor in possession, has filed an
Amended Plan of Reorganization (the "Plan") in its Chapter 11 bankruptcy case,
in which it proposes to pay 24% of all Allowed Claims as defined in section
1.03 of the Plan that are classified in Class 7 of the Plan unless the holder
of the such claim is a Non-Certifying Customer, in which event, Humansoft
proposes to pay 12% of the Allowed Claim of such claimant (the "Plan
Indebtedness"); and provided the Plan is confirmed, Guarantor is willing to
execute this Guaranty of Payment in favor of each Class 7 Creditor of
Humansoft's performance of its payment obligations under the Plan to Class 7
Creditors. The Plan Indebtedness to each Class 7 Creditor thus depends on its
status as a Certifying or Non-Certifying Customer as those terms are defined in
the Plan. The Plan Indebtedness Exhibit identifies by name and Allowed Claim
amount each Class 7 Creditor as well as the specific amount of Plan
Indebtedness that will be owed to such Class 7 Creditor if the Plan is
confirmed and if the Class 7 Creditor is a Certifying or a Non-Certifying
Creditor.

         1.02 Statement of Agreement. For and in consideration of the sum of
$10.00 and other valuable consideration, the receipt and sufficiency of which
are hereby acknowledged by Guarantor, Guarantor does hereby make the following
guarantees to and agreements with each Class 7 Creditor if and only if the Plan
is confirmed. If the Plan is not confirmed, then this Guaranty shall be null
and void and of no force or effect.

                            ARTICLE II - GUARANTEES

         2.01 Guaranty of Payment. Guarantor does hereby conditionally
guarantee to each Class 7 Creditor the full and prompt payment of the Plan
Indebtedness to it (if applicable, either as a Certifying Customer or a
Non-Certifying Customer, but not both) when due, without acceleration, with
such interest as may accrue thereon under the Plan, provided the Plan is
confirmed. In the event that Humansoft fails to make an installment payment by
the date set forth in the Plan, Guarantor, upon demand, will make such payment,
without acceleration.

                    ARTICLE III - AGREEMENTS AND WARRANTIES

         3.01 Consents. Guarantor hereby consents and agrees that a Class 7
Creditor may at any time, and from time to time, without notice to or further
consent from Guarantor, either with or without consideration: extend the time
for payment of the Plan Class 7 indebtedness.

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         3.02 Waiver of Defenses. Guarantor hereby waives and agrees not to
assert or take advantage of any defense based upon: (a) any incapacity, lack of
authority, death or disability of Guarantor or any other person or entity; (b)
any failure of a Class 7 Creditor to commence an action against Humansoft; (c)
any lack of acceptance or notice of acceptance of this Guaranty by a Class 7
Creditor; and (d) any lack of presentment, demand, protest, or notice of
demand, protest, dishonor or nonpayment with respect to the Class 7 Plan
indebtedness;

         3.03 Liability of Guarantor. This is a guaranty of payment and not of
collection. The liability of Guarantor under this Guaranty shall be direct and
immediate and not conditional or contingent upon the pursuit of any remedies
against Humansoft. Guarantor waives any right to require that an action be
brought against Humansoft

         3.04 Warranties. Guarantor warrants and represents (a) that the
execution and delivery of this Guaranty do not violate or constitute a breach
of any agreement to which Guarantor is a party or any applicable laws, and (b)
that there is no litigation, claim, action or proceeding, pending or threatened
against Guarantor which would adversely affect the financial condition of
Guarantor or the ability of Guarantor to fulfill all obligations of Guarantor
hereunder.

                        ARTICLE IV - GENERAL CONDITIONS

         4.01 Service of Process. Guarantor hereby (a) submits to personal
jurisdiction in the State of Georgia for the enforcement of this Guaranty, and
(b) waives any and all rights under the law of any state to object to
jurisdiction within the State of Georgia for the purposes of litigation to
enforce this Guaranty. In the event that such litigation is commenced,
Guarantor agrees that service of process may be made and personal jurisdiction
over Guarantor obtained, by the serving of a copy of the summons and complaint
upon Guarantor's appointed agent for service of process in the State of
Georgia, whose name and address is as follows:

         BONNIE L. HERRON
         4355 SHACKLEFORD ROAD
         NORCROSS, GA 30093

with a copy to:

         J. Michael Levengood
         Long Aldridge & Norman, LLP
         Suite 5300, 303 Peachtree Street
         Atlanta, GA 30308

         4.02 Communications. Unless and except as otherwise specifically
provided herein, any and all notices, elections, approvals, consents, demands,
requests and responses thereto ("Communications") permitted or required to be
given under this Guaranty shall be in writing, signed by or on behalf of the
party giving the same, and shall be deemed to have been properly given and
shall be effective upon the earlier of receipt thereof or deposit thereof in
the United States mail, postage prepaid, certified with return receipt
requested, to the other party at the address of such other party set forth
hereinbelow or at such other address within the continental United States as
such other party may designate by notice specifically designated as a notice of

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change of address and given in accordance herewith; provided, however, that the
time period in which a response to any Communication must be given shall
commence on the date of receipt thereof; and provided further that no notice of
change of address shall be effective with respect to Communications sent prior
to the time of receipt thereof. Receipt of Communications under this Guaranty
shall occur upon actual delivery (whether by mail, telecopy transmission,
messenger, courier service, or otherwise) to any person who is Guarantor or an
officer of Guarantor at any location where such person may be found, or to an
officer, partner, agent or employee of Guarantor, at the address of such party
set forth hereinbelow, subject to change as provided hereinabove. An attempted
delivery in accordance with the foregoing, acceptance of which is refused or
rejected, shall be deemed to be and shall constitute receipt; and an attempted
delivery in accordance with the foregoing by mail, messenger, or courier
service (whichever is chosen by the sender) which is not completed because of
changed address of which no notice was received by the sender in accordance
with this provision prior to the sending of the Communication shall also be
deemed to be and constitute receipt. Any Communication, if given to a Class 7
Creditor, must be addressed as indicated in the Plan Indebtedness Exhibit,
subject to change as provided hereinabove, and, if given to Guarantor, must be
addressed as follows, subject to change as provided hereinabove:

         BONNIE L. HERRON
         4355 SHACKLEFORD ROAD
         NORCROSS, GA 30093

with a copy to:

         J. Michael Levengood
         Long Aldridge & Norman, LLP
         Suite 5300, 303 Peachtree Street
         Atlanta, GA 30308

         4.03 Irrevocability and Revival. This Guaranty shall be irrevocable by
Guarantor and shall remain in effect until all indebtedness guaranteed hereby
has been completely paid.

         4.04 Applicable Law. This Guaranty shall be interpreted, construed and
enforced according to the substantive law of the State of Georgia without
giving effect to its principles of choice of law or conflicts of law.

         4.05 Miscellaneous. Time is of the essence with respect to all
obligations of Guarantor hereunder. The provisions of this Guaranty shall be
binding upon Guarantor and the successors and assigns of Guarantor and shall
inure to the benefit of the Class 7 Creditors, and their respective heirs,
executors, legal representatives, successors, successors-in-title and assigns.
This Guaranty is assignable by a Class 7 Creditor as a part of the sale or
assignment of such Class 7 Creditor's Allowed Claim, and any assignment hereof
by such Class 7 Creditor shall operate to vest in the assignee all rights and
powers herein conferred upon and granted to such Class 7 Creditor and so
assigned by it. All personal pronouns used herein, whether used in the
masculine, feminine or neuter gender, shall include all other genders; and the
singular shall include the plural and vice versa. This Guaranty contains the
entire agreement between Guarantor and each Class 7 Creditor relating to the
guarantying of the Plan Indebtedness by

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Guarantor and supersedes entirely any and all prior written or oral agreements
with respect thereto; and Guarantor and each Class 7 Creditor acknowledge that
there are no contemporaneous oral agreements with respect to the subject matter
hereof.

         IN WITNESS WHEREOF, Guarantor has executed this Guaranty under seal as
of the date first above written.

                                            Intelligent Systems Corporation

                                            BY:   /s/
                                               -------------------------------

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                                                                    EXHIBIT 10.5

                               FIRST AMENDMENT TO
                   AMENDED AND RESTATED REVOLVING CREDIT NOTE

         ENTERED INTO by and between AMSURG CORP., a Tennessee corporation (the
"Borrower"), and SUNTRUST BANK, successor-in-interest to SunTrust Bank,
Nashville, N.A., its successors, assigns or any subsequent lawful holder of the
Note referenced herein (the "Lender"), as of this 13th day of March, 2000.

                                    RECITALS:

         1. The Borrower issued to the order of Lender an Amended and Restated
Revolving Credit Note dated May 19, 1998 in the principal amount of up to
$30,000,000.00 (the "Note").

         2. The Borrower and the Lender desire to amend the Note as set forth
herein.

         NOW, THEREFORE, in consideration of the premises and for other good and
valuable consideration, the receipt and adequacy of which is hereby
acknowledged, the Borrower and the Lender agree as follows:

         1. The fourth paragraph of the Note is amended and restated as follows:

            This Note shall be repaid as follows:

                     (a) Commencing on the tenth (10th) day of June, 1998,
            and on the tenth day of each consecutive month through and
            including December 10, 2001, the Borrower shall pay to Lender
            an amount equal to all then accrued interest; and

                     (b) On January 10, 2002, this Note shall mature at
            which time the Borrower shall pay to Lender an amount equal to
            all outstanding principal, plus all then accrued interest.

         2. The Note is not amended in any other respect.

         3. The Borrower reaffirms its obligations under the Note, as amended,
and the Borrower agrees that its obligations thereunder are valid and binding,
enforceable in accordance with its terms, subject to no defense, counterclaim,
or objection.

         4. In connection with this amendment agreement, the Borrower agrees to
pay to the Lender an extension fee equal to $52,500 payable as follows: (a)
$15,000 shall be paid on the execution of this amendment agreement, and (b)
$37,500 shall be paid on January 10, 2001 if the indebtedness evidenced by the
Note has not been replaced by an expanded credit facility by January 10, 2001,
provided that if the indebtedness evidenced by this Note has been replaced by an
expanded credit facility by such date, then the $37,500 portion of the extension
fee described herein shall be canceled.

         ENTERED INTO as of the date first set forth above.

BORROWER:                           LENDER:

AMSURG CORP.                        SUNTRUST BANK

By: /s/ Claire M. Gulmi             By: /s/ Mark D. Mattson
    ----------------------------        ----------------------------------------
Title: CFO                          Title:  Director
       -------------------------            ------------------------------------

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