DOS ain't dead

X-VESA 2.0 and crippled nV videoBIOS fn 4F07h fix (Announce)

posted by RayeR , CZ, 06.05.2026, 19:13
(edited by RayeR on 07.05.2026, 19:34)

Hi, I found there was released new tool for examining VGA VESA VBE BIOS implementations and its quirks.
https://www.vogons.org/viewtopic.php?t=111021
also there's attempt to reimplement of discarded VBE func 4F07h on some crippled nVidia vBIOSes via NEWAX TSR (from the same author) - currently it works for lower VESA resolutions, tested in Quake and DN3D.
https://www.vogons.org/viewtopic.php?p=1420692#p1420692

BTW it's cool that X-VESA is the one of probably only 2 existing DOS programs that uses AVX instructions. The 2nd one is MandelX benchmark by Falcosoft: https://www.vogons.org/viewtopic.php?t=106949
Maybe you know some other DOS program that use AVX so you can share...

It just came in my mind that it maybe utilized in FFMPEG/x264/x265 code for video decoding in DUGL player (AFAIK x264/x265 has already some SSE/AVX optimized assembly code but probably disabled in DOS build due to some issues...)

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DOS gives me freedom to unlimited HW access.

Complete thread:

• X-VESA 2.0 and crippled nV videoBIOS fn 4F07h fix - RayeR, 06.05.2026, 19:13 (Announce)
  • X-VESA 2.0 and cippled nV videoBIOS fn 4F07h fix - Laaca, 06.05.2026, 22:59
  • NEWAX beta 7 - crippled nV videoBIOS fn 4F07h fix - RayeR, 11.05.2026, 14:32
  • NEWAX beta 9 - planar modes added - RayeR, 13.05.2026, 15:13