[GEM Development] SDPSC9 updated

[Thomas Clayton]

Are these the GEM 1.x updatED 'from scratch' (the others you had posted
were 'patched')

OR 
are they a later GEM version?

Thomas Clayton

Still remembering the enjoyment of reading thru your 1.1 ASM patch code
a few years back.
TC

--- John Elliott <jce at seasip.demon.co.uk> wrote:

>   I've updated the VGA driver source (SDPSC9) that's on my site.
> 
>   Note that the actual driver is (almost) unchanged. What's different
> is the
> way it's built. I've split the source code up into modules using the
> same
> organization as the original DRI driver source, and (where
> appropriate) 
> used DRI's source (via Chris Barnes' VGA driver) rather than my
> disassembled 
> version.
>   Having done that, I was able without too much work to copy the
> source for
> the 640x350 EGA driver into my tree as well. So there's now a version
> of the
> EGA driver (SDEHF9) that supports codepages and the high-resolution
> timer.
> 
>   Weird trivia:
> * If LINK86 is rejecting your INP files for no apparent reason, stick
> 128
>  dummy bytes on the end. It only reads up to a multiple of 128 bytes,
> so
>  up to 127 bytes at the end will be ignored.
> 
> * The SDPSC9 I disassembled was using version 21 of the mouse driver,
> but
>  the SDEHF9 was only on version 20.
> 
> * The driver source tree we've got is several versions earlier than
> GEM 3.1
>  (for example, the mouse driver is version 16). But it also contains
> some
>  things that appear to be bugfixes but aren't present in the GEM 3.1
>  drivers. They're mostly commented "jn" plus various dates in Autumn
> 1987.
> 
> -- 
> John Elliott
> _______________________________________________
> gem-dev mailing list
> gem-dev at simpits.org
> http://www.simpits.org/mailman/listinfo/gem-dev
> 


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