Path: utzoo!utgpu!jarvis.csri.toronto.edu!mailrus!purdue!decwrl!sun!pitstop!sundc!seismo!uunet!microsoft!w-colinp
From: w-colinp@microsoft.UUCP (Colin Plumb)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Inserting custom library routines
Message-ID: <819@microsoft.UUCP>
Date: 7 Mar 89 08:12:51 GMT
References: <8902040530.AA29151@postgres.Berkeley.EDU> <19927@agate.BERKELEY.EDU> <15377@cup.portal.com>
Reply-To: w-colinp@microsoft.uucp (Colin Plumb)
Organization: very little
Lines: 31

Classic_-_Concepts@cup.portal.com wrote:
> How does he substitute a routine which is a superset of the original?
> He is particularly interested in applying this to the Text function.

NAME
     SetFunction -- change a function vector in a library

SYNOPSIS
     oldFunc = SetFunction(library, funcOffset, funcEntry)
     D0                    A1       A0.W        D0

FUNCTION
     SetFunction is a functional way of changing those parts of
     a library that are checksummed.  They are changed in such a
     way that the summing process will never falsely declare a
     library to be invalid.

INPUTS
     library - a pointer to the library to be changed

     funcOffset - the offset that FuncEntry should be put at.

     funcEntry - pointer to new function

Basically, open the library and SetFunction() the apropriate routine.

Good luck!
-- 
	-Colin (uunet!microsoft!w-colinp)

"Don't listen to me.  I never do." - The Doctor