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Article #1188Re: Aspect ratio in mode X
From: Michael Duffy
Date: Fri, 13 Nov 1992 07:27
Date: Fri, 13 Nov 1992 07:27
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In article <2vdq+1a@lynx.unm.edu> blakely@triton.unm.edu () writes: > >When I use the modeX 320 x240 resolution I am not getting a square aspect >ratio. It seems to be squashing the screen. I'm using borlandc and >the twk bgi library. I was under the impression that this mode was designed >to have a 1:1 aspect ratio. Any ideas and help would be greatly >appreciated. > Yeah, Michael Abrash's code has a little bug in the mode setting routine. the code: mov dx,MISC_OUTPUT ; i.e. 03c2h mov al,0e7h out dx,al needs to have the middle line changed to: mov al,0e3h This is for Abrash's code from Dr. Dobbs Journal (July 1991), and for any code based on his routines without this bug fixed. As for what you can do about your bgi library...... Can't help you there. Maybe contact the library author. Later and Good Luck, Mike Duffy (mduffy@aludra.usc.edu) /* Cinema Major and Computer Geek rolled into one. Dangerous combination! */
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Path: arc1-ca.pugleaf.net!sparky!uunet!europa.asd.contel.com!darwin.sura.net!zaphod.mps.ohio-state.edu!sdd.hp.com!elroy.jpl.nasa.gov!usc!chaph.usc.edu!aludra.usc.edu!not-for-mail From: mduffy@aludra.usc.edu (Michael Duffy) Newsgroups: rec.games.programmer Subject: Re: Aspect ratio in mode X Date: 12 Nov 1992 23:27:07 -0800 Organization: University of Southern California, Los Angeles, CA Lines: 26 Distribution: usa Message-ID: <1dvlcbINN7e7@aludra.usc.edu> References: <1992Nov4.203406.1527@midway.uchicago.edu> <Bx7xt8.813@news.cso.uiuc.edu> <2vdq+1a@lynx.unm.edu> NNTP-Posting-Host: aludra.usc.edu