RayeR
CZ,
06.05.2026, 19:13
(edited by RayeR, 07.05.2026, 19:34) |
X-VESA 2.0 and crippled nV videoBIOS fn 4F07h fix (Announce) |
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...) ---
DOS gives me freedom to unlimited HW access. |
Laaca
Czech republic,
06.05.2026, 22:59
@ RayeR
|
X-VESA 2.0 and cippled nV videoBIOS fn 4F07h fix |
VERY interresting ! ---
DOS-u-akbar! |
RayeR
CZ,
11.05.2026, 14:32
(edited by RayeR, 12.05.2026, 17:34)
@ RayeR
|
NEWAX beta 7 - crippled nV videoBIOS fn 4F07h fix |
Cool, new CRTCs was discovered so it allowed full length of start address - should work in hogher resolutions now:
https://www.vogons.org/viewtopic.php?p=1421874#p1421874
edit beta 7 out (he's spitting sources like a machinegun :)
https://www.vogons.org/viewtopic.php?p=1422070#p1422070 ---
DOS gives me freedom to unlimited HW access. |
RayeR
CZ,
13.05.2026, 15:13
(edited by RayeR, 13.05.2026, 16:11)
@ RayeR
|
NEWAX beta 9 - planar modes added |
NEWAX now adds support for planar modes, usable also for older GeForce. Maybe after many year of broken VBE nV finally get correct VBIOS that it deserves :)
NEWAX was originally designed for Kepler/Maxwell/Pascal cards, where VESA function 4F07h (Set/Get Display Start Address) is broken and requires the CRTC register workaround. However, version 0.8 now includes several additional fixes — most notably the 4F05h VRAM bounds check, the 4F01h page count recalculation, and the PLANAR mode support — which are potentially useful on older Nvidia cards as well (GeForce 6/7/8/9 series and GT2xx), where 4F07h is functional but other VESA issues may still be present.
It also some way helps on newer nvidia cards, like: RTX A4000 (Ampere, neither 4F06h nor 4F07h works there).
https://www.vogons.org/viewtopic.php?p=1422260#p1422260 ---
DOS gives me freedom to unlimited HW access. |
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