From: Shawn Hargreaves <Shawn AT talula DOT demon DOT co DOT uk>
Newsgroups: comp.os.msdos.djgpp
Subject: Re: Allegro problem.
Date: Sat, 4 Jan 1997 12:10:30 +0000
Organization: None
Lines: 26
Distribution: world
Message-ID: <9aDsRPA2ikzyEwu$@talula.demon.co.uk>
References: <Pine DOT SUN DOT 3 DOT 95 DOT 970103234507 DOT 16458C-100000 AT bert DOT eecs DOT uic DOT edu>
NNTP-Posting-Host: talula.demon.co.uk
MIME-Version: 1.0
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

Andrew Deren writes:
>I just got the Allegro package, after I read so much about it. I did not
>have any problems installing it, but when I try running programs done with
>Allegro under Win95 DosPrompt, it kicks me back to windows with message:
>"Your program accessed memory currently in use at 000004CC from C000:4E20"

Argh! That's in the middle of the BIOS area, which Allegro shouldn't be
messing with, except for possibly reading parts of it during the video
card setup. The ATI driver checks an ID string from C000:0031, and it is
possible that the VESA drivers could read from that address, but nothing
should be _writing_ to the BIOS area, and I can't imagine a read would
make windows complain. What graphics card do you have?

A couple of things to try:

Run examples\ex1.exe    - simple mode 13h graphics test
Run examples\ex5.exe    - keyboard interrupt test
Run examples\ex6.exe    - mouse test
Run examples\ex7.exe    - timer interrupt test

Let me know what happens, and I'll suggest some more things to try...

/*
 *  Shawn Hargreaves - shawn AT talula DOT demon DOT co DOT uk - http://www.talula.demon.co.uk/
 *  Ghoti: 'gh' as in 'enough', 'o' as in 'women', and 'ti' as in 'nation'.
 */