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Soundcard emulation in DOS on non-legacy hardware. Possible? (Emulation)

posted by tkchia Homepage, 04.11.2022, 11:12
(edited by tkchia on 04.11.2022, 11:23)

Hello Zyzzle,

> https://www.vogons.org/viewtopic.php?t=61451
 ...
> https://winraid.level1techs.com/t/news-intel-sandy-ivy-bridge-and-haswell-vbios-modules/30272/61
Cool, let me check these out (especially the second link).

> compatibility on bare metal DOS) and "overwrite" the ones which have broken
> compatibility (eg, Kaby Lake). Checksums would need to be recalculated, and
> it's very likely I'd brick the laptop by attempting to do this, however, so
> I haven't attempted it!
As I mentioned, you can probably try to load a VGA option ROM image into RAM instead. Check (via the "PCIR" data) that the option ROM is compatible with your actual video card, and run the code from RAM. Maybe do this from within a DOS TSR or device driver, to (re)initialize the video BIOS after system startup. With any luck, this will work.

This is of course a less "permanent" solution than actually flashing the code onto a ROM chip. But it should be less risky. ;-)

(My (still very nascent) biefircate project tries to do something similar.)

Thank you!

---
https://gitlab.com/tkchia · https://codeberg.org/tkchia · 😴 "MOV AX,0D500H+CMOS_REG_D+NMI"

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