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Article #1459Re: VGA 640x400x256 possible!
From: orlov
Date: Sat, 12 Sep 1992 20:10
Date: Sat, 12 Sep 1992 20:10
31 lines
1756 bytes
1756 bytes
In article <"92-09-01-18:08:55.86*UKB8"@DKAUNI2.BITNET>, UKB8@DKAUNI2.BITNET writes: > > Hi everybody! > > I'm looking for a way to trick a *standard* VGA-card into a graphic reso- > lution of 640x400x256. > As a standard VGA has at least 256K memory and 640x400 pixels at 8 bit > color resolution use 256000 bytes, this should be possible (using 4 bit > planes as in normal EGA/VGA-modes); as far as I heard by now, the VGA's > clocking scheme doesn't allow it, but I hope you prove that wrong and > come up with an ingenious solution! :-) > Please answer by mail, if it works, I'll summarize. > > TNXIA, > Kai Hi Kai! I managed to force my VGA (in fact, Paradise VGA) to enter 640x400x256 mode. Its number is 5Eh! Just invoke INT 10h with AX=005Eh and you'll have your VGA working in 640x400x256. I was told this must work on ANY VGA ! BTW: I couldn't access the lower half of screen! Only first 128K can be accessed (seg=A000..BFFF). Do you (or someone else who reads this) know how to access another 128K ? With best regards, D.S. ------------------------------------------------------------------------------- "I'm from the land of Russia where Shadows lie!" -------------------------------------------------------------------------------
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Newsgroups: comp.os.msdos.programmer Path: arc1-ca.pugleaf.net!sparky!uunet!mcsun!fuug!kiae!uranus!mars.ibioc.serpukhov.su!orlov From: orlov@mars.ibioc.serpukhov.su Subject: Re: VGA 640x400x256 possible! Message-ID: <1992Sep12.113051.1@mars.ibioc.serpukhov.su> Lines: 31 Sender: news@uranus.ibioc.serpukhov.su (USENET News System) Organization: Institute of Cell Biophysics References: <"92-09-01-18: 08:55.86*UKB8"@DKAUNI2.BITNET> Date: Sat, 12 Sep 1992 20:10:51 GMT