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List:       bochs-dev
Subject:    SB16 emulation tweak
From:       "Alex Mina" <usyst () gu ! kiev ! ua>
Date:       1999-11-23 13:14:54
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Hi!

To the author of SB16 code.

I have found some minor glitch in then SB16 emulation code. Actually it
doesnt affect much but anyway - just to be as close as possible to the real
thing. It's about two undocumented DSP commands: read test register and
write test register. These commands uses e.g. CL diagnose.exe and may use
some another program. There is a 8-bit register inside DSP which is
accessible via this commands. Value preserves across software DSP resets.

0xE4 - Write Test Register. Arguments: 1 byte - value to be written
0xE8 - Read Test Register. Arguments: none.

PS: this commands implements not only SB16 but also SB Pro compatibles.

wbr
Alex Mina
usyst@gu.net



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