Help with SVGA in protected mode

[Harshal Kalay]

basically, if you are talking about the
capabilities of the SVGA card, then they are very specific to the card
manufacturer itself
you'll have to either go thr' the manual for programmers for those specific
ports and int functions etc.

or you can use the VESA standard also, which now-a-days mostly all
manufacturers have this built in. although the version numbers may vary.

this standard can be bought, or searched for the draft version on the web


- Harshal

----- Original Message -----
From: "Brian O'Connell" <oconnellb@hotmail.com>
To: <os-help@tunes.org>
Sent: Friday, April 28, 2000 6:28 AM
Subject: Help with SVGA in protected mode


> Hello everybody,
>
>      I'm currently making my own operating system and I've made
significant
> progress from when I started, but there are a couple
> of areas that I need help with. First of all, I want to be able to access
> some of the better graphics capabilities of
> my computer and I need the Extended SVGA BIOS to do this. I know that
there
> is a way to access this in protected mode because
> I have one of the manuals. I read the instructions, but they
> don't seem to work. Althoug I'm wondering if my BIOS includes them, I'm
> pretty sure it does because I think I have Phoenix BIOS 4.0, revision 6.
>      After that, I'd also like to be able to access the Plug and Play
> BIOS. So far, my OS boots, has a login prompt and switches to protected
> mode with graphics VGA mode 3. It has a simple keyboard handler and can
> output text to the screen. I've written all the code in assembler so far
> (NASM mainly) and I'd like to keep using assembler. I'd appreciate any
> help, especially assembly source as an example to go by.
>
> Thanks,
> Brian
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