Article View: comp.os.os2.programmer
Article #1724Re: Writing Video Drivers
From: BJT105
Date: Thu, 05 Nov 1992 04:44
Date: Thu, 05 Nov 1992 04:44
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Any member of the developer assistance program can get sample source code
for video drivers .. currently what is available is the code to VSVGA, V8514
VVGA BVHVGA, BVHSVGA, BVH8514, and, unfortunately, the only PM driver at
this time is the code to 16-bit VGA. "very soon now" the code to the 32-bit
tseng drivers is planned to be released .. I have no idea when.
Documenation is available in the forms of
"OS/2 2.0 virtual device driver reference"
"OS/2 2.0 physical device driver reference"
and "OS/2 2.0 presentation driver reference"
all three are part of the CSET/2 documentation set, and can be purchaced
seperately.
OK .. now WHY doesn't every board around have OS/2 device drivers,
since so much is available?!:
(1) IBM didn't release the code mentioned above until September
(2) The VV, BV, and PM source code is comprised on hundreds of thousands
of lines of mixed C and assembler, so it is very difficult to
pick up quickly!
(3) Most video board companies are fly-by-night operations that feed on
consumers that don't realize that SVGA means NOTHING by itself ..
that each chipset requires custom software for Windows, OS/2, X
and whatever else. And, basically, they don't want to have to deal
with writing drivers for more than one operating system (windows)
(BTW .. there are exceptions to this rule .. Orchid and Trident
come to mind ...)
Bernie
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Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!spool.mu.edu!agate!usenet.ins.cwru.edu!ukma!psuvax1!psuvm!bjt105 From: BJT105@psuvm.psu.edu Newsgroups: comp.os.os2.programmer Subject: Re: Writing Video Drivers Message-ID: <92309.234426BJT105@psuvm.psu.edu> Date: 5 Nov 92 04:44:26 GMT References: <1992Nov4.121856.29225@actrix.gen.nz> Organization: Penn State University Lines: 27