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- Newsgroups: comp.os.os2.misc
- Path: sparky!uunet!cis.ohio-state.edu!zaphod.mps.ohio-state.edu!caen!destroyer!ubc-cs!fs1.ee.ubc.ca!tedc
- From: tedc@ee.ubc.ca (ted chen)
- Subject: Re: Does 800x600x256 on the VGA part of a Graphics Ultra
- Message-ID: <1992Jul29.190610.17303@ee.ubc.ca>
- Organization: University of BC, Electrical Engineering
- References: <1992Jul26.200231.12787@ee.ubc.ca> <712297745snx@ananke.stgt.sub.org>
- Date: Wed, 29 Jul 1992 19:06:10 GMT
- Lines: 30
-
- In article <712297745snx@ananke.stgt.sub.org> ak@ananke.stgt.sub.org (Andreas Kaiser) writes:
- >
- >In article <1992Jul26.200231.12787@ee.ubc.ca> tedc@ee.ubc.ca writes:
- >
- > > I haven't been able to get the Graphics Ultra into 800x600x256 mode using
- > > the VGA portion of the card, in DOS full screen. It doesn't even work if
- > > if I boot from a DOS 5.0 floppy and try going into that mode (VPIC). Wonder
- > > what's happening?
- >
- >It doesn't work because the code which should switch to this mode got
- >dropped off the BIOS. ATI had to take a close look into their Wonder
- >BIOS and had to drop some less important parts of it to get enough ROM
- >space for the 8514 code. Maybe the 800x600x256 mode was too near to the
- >1024x768x256 mode and accidentally fell into the same trashcan.
- >
- >There are other things which got dropped: e.g. BIOS graphics in SVGA
- >modes other then 800x600x16 (which is trivial). You'll see this effect
- >when using GIF viewers, since this is perhaps the only kind of software
- >where BIOS graphics are used sometimes.
- >
- >:::::::::::::::::::: subnet: ak@ananke.stgt.sub.org
- >:: Andreas Kaiser :: fidonet: 2:241/7220.9
- >::::::::::::::::::::
-
- The 800x600x256 mode DOES work, but NOT at 72 Hz refresh. You must drop down
- to 70 Hz for it to work. Thanks to the fellow who mentioned this fix.
-
- Ted
-
-
-