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- Xref: sparky comp.sys.ibm.pc.hardware:29269 comp.benchmarks:1629 comp.sys.intel:2189
- Newsgroups: comp.sys.ibm.pc.hardware,comp.benchmarks,comp.sys.intel
- Path: sparky!uunet!clarkson!smithbm
- From: smithbm@craft.camp.clarkson.edu (Azrak)
- Subject: Re: ATI Ultra PRO 24-bit?
- Message-ID: <smithbm.721320189@craft.camp.clarkson.edu>
- Sender: news@news.clarkson.edu
- Nntp-Posting-Host: craft.camp.clarkson.edu
- Organization: Clarkson University
- References: <smithbm.721061471@craft.camp.clarkson.edu> <8eyl1Bi00YdeI0qocA@andrew.cmu.edu> <smithbm.721264472@craft.camp.clarkson.edu> <1992Nov9.080150.18564@colorado.edu>
- Date: Mon, 9 Nov 1992 14:43:09 GMT
- Lines: 52
-
- drew@ladymacb.cs.colorado.edu (Drew Eckhardt) writes:
-
- >In article <smithbm.721264472@craft.camp.clarkson.edu> smithbm@craft.camp.clarkson.edu (Azrak) writes:
- >>David Eugene Dwiggins <dd2x@ANDREW.CMU.EDU> writes:
- [Stuff deleted]
- >>
- >>>DON'T BUY ATI PRODUCTS IF YOU WANT TO KNOW PROGRAMMING INFORMATION.
- >>
- >>>Gene
- >>
- >>Huh????
- >>
- >>You mean the manual you get with the ATI Graphics Ultra Pro doesn't
- >>tell you how to switch into 640x480x16.7M mode???
- >>
- >>My manual from the ATI VGAWonder 256k (yes, old) told me what HEX
- >>value to use to switch into any mode the card supported, and even
- >>told me how the bit planes were organized.
-
- >You feed that hex value to the BIOS. When you need to program the board's
- >registers from inside protected mode, such as in a Xserver running under unix,
- >you can't call BIOS, and that information is worthless.
-
- Ok, so it does tell you what value to feed the BIOS. Ok. That's good.
- I wasn't planning on writing anything sophisticated, just setting the
- mode with the BIOS, and directly writing to the Video Memory for simple
- image display purposes.
-
- >You need to know how to program the clock synthesizer among other things,
- >which most manufacturers will happily provide. However, a few manufacturers
- >are using propriety clock synthesizer chips, and not providing programming
- >information without an NDA, etc.
-
- Well, my old ATI VGAWonder never told me that stuff either, so I guess
- ATI has never given out programming information. I stand corrected.
- (All the "programming info" I need (simple, I know) is mode # and memory
- organization)
-
- >Thus, without reverse engineering the BIOS you can't write a free Xserver
- >for the card.
-
- I'm sure someone will sooner or later, or ATI will fall off the face of
- the Earth for being so pig-headed. I hope that when someone does get the
- info they scan it and post it to the net. ;>
-
- >--
- >Microsoft is responsible for propogating the evils it calls DOS and Windows,
- >IBM for AIX (appropriately called Aches by those having to administer it), but
- >marketing's sins don't come close to those of legal departments.
- >Boycott AT&T for their absurd anti-BSDI lawsuit.
-
- - Brian (smithbm@craft.camp.clarkson.edu)
-