Re: SVGA
From: Alan Tu
> Video Adapter Type: VGA
> Manufacturer: Phoenix
> VESA Support Installed: Yes
> VESA Version: 1.02
> VESA OEM Name: Trident TGUI96xx
>Could the video adapter type being "VGA" mean I couldn't use
>SVGA properly?
No, SVGA is merely an extension of VGA. Type VGA means
that it is indeed backward compatible with VGA.
>Would I try to find "Phoenix"'s web site or "Trident"'s? I am
>running a DOS session under Win95.
Phoenix makes the video cards, and the BIOS for standard
VGA. Trident makes the chipset on the card which handles
SVGA, modes greater than 19. I think that's how it works
anyway. I'm not really into the corporate politics. I just know
they make a mess for us end users.
This page gives the details about the relationship.
The FAQ page will give you more answers.
According to the FAQ you need a TSR called VESA.EXE
which they evidently forgot to put on their website. I did
find it at
A.EXE
But that's made for another chipset. Of the same company
and to the same VESA version, though, so it might work.
It's 12.5k.
Or, possibly better, is ftp://ftp.netcom.com/pub/ac/accolade/vesa/uvesa.exe
That's a universal VESA VBE driver that uses VESA 1.2 and might work
better. It's 22.4k
>Does the VESA being installed mean anything?
That means it's capable of using VESA...if you write your program
specifically for that video card using machine code. In which case the
program wouldn't work with any other video cards. Or if you use
Windows drivers which only work in Windows. Or if you use a TSR
driver to translate standard VESA VBE codes into that card/chip's
specific codes. That's what you need for DOS-mode SVGA.
Some newer cards have the driver built into the card's ROM chips,
unfortunately most don't.
BTW, if other DOS-mode programs run in SVGA okay, it's because
they have a built-in driver or they came with one that they load up as
the program starts.
Falkon, wishing the creators of SVGA hadn't made such a mess of
the whole thing...
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