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Article #1724

Re: Writing Video Drivers

#1724
From: BJT105
Date: Thu, 05 Nov 1992 04:44
27 lines
1793 bytes
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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Message-ID: <92309.234426BJT105@psuvm.psu.edu>
Path: arc1-ca.pugleaf.net!sparky!uunet!olivea!spool.mu.edu!agate!usenet.ins.cwru.edu!ukma!psuvax1!psuvm!bjt105
References: <1992Nov4.121856.29225@actrix.gen.nz>

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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
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