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Re: How do I flash VBIOS on an S3 card?

in Marvin \ Video
I'm trying to identify the offsets in the bios of s3 cards (virge, virge dx and trio 64v+) which controls the memory and core frequency (to my knowledge they are syncro). AFAIR, the 2.01.07 ViRGE/DX video BIOS offers those useful data offsets: 0x45 - BIOS power up string (max. 96 characters) 0xA5 - …

Re: MTRRLFBE and AGP/PCIe cards in DOS

in Marvin \ Video
so all VESA 1.2 compatible modes use banked VGA frame buffer and thus all VESA 1.2 modes are affected. So once again, this is not a VESA OR VGA situation. it is possible to create a TSR which will enable WC on VESA banked mode set and disable it for VGA modes, but there is one caveat: RDMSR and …

Re: MTRRLFBE and AGP/PCIe cards in DOS

in Marvin \ Video
AFAIK Contrary to the VESA LFB, VGA range Write Combining is practically useless. Since the systems that support Write Combining can already run VGA 320x200 at 60 FPS anyways. That and VGA WC can cause some compatibility issues with a few games (Commander Keen IIRC). Same here indeed, write …

Re: Garbled palette on ISA VGA card running "tunnel"

in Marvin \ Video
Hello! This can be caused by either bugs in program (as I heard some RAMDACs don't like palette updates via "rep outsb" instruction instead of "out dx, al") or by issues with video controller or RAMDAC itself. Did it work on other videocards properly? Does it experience similar bugs in other …

Re: What's up with my F1 key?

Sigh. If I boot to DOS 6.22 the f1 key crashes it entirely, I also noticed this same symptom happens with the F11 key as well. It even crashes from within the bios, so something is very wrong. It's very erratic though, it functions as intended in windows XP, and if I launch a game like DOOM from …

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