OS2 World.Com Forum

Subject  :  VESA Support under MDOS?
Author  :  Fudeba daniel@caetano.eng.br
Date  :  01 Aug, 2004 on 17:24
Hi,

I was playing with many DOS emulators and most of them relies on weird resolutions (such as 512x384x15 bits), which seems to be provided by MySNAP drivers, but MySNAP seems to not act under MDOS sessions.
My video board is a Matrox G550 (32MB of RAM), and it does support VESA 3.0 by hardware, but do not support these weird modes natively.
I had tried many "DOS universal VESA drivers" (including the old Sci-Tech 6.53, which I had bought several years ago) but these drivers just do not understand my video board (unknown chipset is the error message).
Anyone had any success using such universal vesa with recent video boards under MDOS?

Regards,
Daniel Caetano


Subject  :  Re:VESA Support under MDOS?
Author  :  LewisR
Date  :  07 Aug, 2004 on 02:28
I tried several with my ThinkPad T30 under DR-DOS 7.03, but none seem to work. I think the real reason is a change in the location of the card's memory address space. I can't seem to get it (the T30 uses an ATI Radeon chip) beyond standard VGA under DOS. I seem to run into the same type of behavior in a VDM...

HTH

---
Lewis
--------------------------
Lewis G Rosenthal, CNA
Rosenthal & Rosenthal


Subject  :  Re:VESA Support under MDOS?
Author  :  kiewitz
Date  :  16 Aug, 2004 on 11:18
Afaik VESA support under MDOS directly uses the graphic-cards BIOS, which means if this BIOS lacks VESA support, you won't be able to get it going.

SNAP is for 32-bit OS/2 PM and does not contain 16-bit Realmode code (used under MDOS).


Powered by UltraBoard 2000 <www.ub2k.com>