Path: utzoo!utgpu!watserv1!watmath!att!dptg!ulysses!andante!princeton!udel!wuarchive!usc!snorkelwacker!bloom-beacon!eru!luth!sunic!dkuug!daimi!poe
From: poe@daimi.dk (Peter rb{k)
Newsgroups: comp.sys.amiga.tech
Subject: Re: Running one from another.
Message-ID: <1990Jul16.092012.21795@daimi.dk>
Date: 16 Jul 90 09:20:12 GMT
References: <3673.269fb6bf@cc.nu.oz.au>
Sender: news@daimi.dk
Organization: DAIMI: Computer Science Department, Aarhus University, Denmark
Lines: 45

c8843267@cc.nu.oz.au writes:

>Hi all,
>	I've got a problem with the program I'm writing write now, any help
>with the below troubles would really help as I'm hoping to sell this thing
>when I'm done. Thanks.

>	The problem:
>	My program must load then at some stage run another program on disk
>which is written in assembler (generated by sekav3.2). The first program (the
>editor) is written in 3.4a Manx 'C'. Right now I'm trying this by using

>	Execute() with the program in assembler as the arguement.

>	The problem is that there are random errors usually involving the
>sprites that are displayed by the assembler prog. But they are totally random
>and don't appear when the assembler prog is run by itself. The only thing I 
>could think of is that maybe one program is writing over top of the other
>or something. ??????????

   Couldn't it be your assembler-program, that has a bug?! Such as writing to
or reading from an address where, there's no memory. I once had a binary-
search routine that once in a while began searching in addreses where I had
no memory installed. The interesting thing was that it could cause the
mouse-pointer to jump around by itself, and that was by *reading* from memory!
This was on an A500 with 1MB.

   My guess would be that your assemblerprogram has some bug that depends on
the location where it's running from.

>	Anyway, what is the right way to run a file off disk from a program
>that is executing. ???? Is there a better way than Execute() or can anyone
>explain the above. Hope so....

   The correct way IS to use Execute(), although it's rather akward in my 
opinion. I think there's a better if you use arp.library...

>							Adam.

  - Peter (poe@daimi.dk)
--
**************************************************************
* "Who other than IBM would want to put a mainframe on       *
*  everybodys desk."                                         *
**************************************************************