From: "Campbell, Rolf [SKY:1U32:EXCH]" Newsgroups: comp.os.msdos.djgpp Subject: Re: Allegro Bug Date: Fri, 31 Mar 2000 14:16:12 -0500 Organization: Nortel Networks Lines: 25 Message-ID: <38E4F97C.F9D71057@americasm01.nt.com> References: <38E16914 DOT 16BCC780 AT home DOT com> NNTP-Posting-Host: wmerh0tk.ca.nortel.com Mime-Version: 1.0 Content-Type: text/plain; charset=us-ascii Content-Transfer-Encoding: 7bit X-Mailer: Mozilla 4.72C-CCK-MCD [en] (X11; I; HP-UX B.10.20 9000/785) X-Accept-Language: en To: djgpp AT Delorie DOT com DJ-Gateway: from newsgroup comp.os.msdos.djgpp Reply-To: djgpp AT delorie DOT com Robin Johnson wrote: > Hi all, > > I found a bug in Allegro, that seems to be restricted to S3 graphics cards, > namely after switching back to Windows from the app, the screen refuses to > refresh. I have narrowed the bug down to the gfx card, because I had two > absolutly identical systems, bar the difference in the gfx cards, one with the > S3, and the other with an ATI card. The systems are completly identical on the > installed software level, by use of drive imaging software. > > Anybody else had the same bug? Or any know any fixes? This does not sound like a bug in Allegro. It sounds like a bug in your Windows video drivers. I've seen various similar problems because most companies are too lazy (or feel it's not economically worth-while) to properly impliment support for SVGA dos programs, or even some non-svga ones. Some ATI cards (tested under Win95b) cannot use the BIOS's video mode restore function to restore from 94xX to 80x33 (it crashes the DosBox). -- (\/) Rolf Campbell (\/)