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- Newsgroups: comp.os.msdos.programmer
- Path: 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
-
- 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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-