[OpenBIOS] New power-up graphics BIOS.
Gavin R. Brewer
gavinbr at gavinbr.worldonline.co.uk
Thu Aug 16 23:09:24 CEST 2001
I am using a reference book on the VESA SVGA standard version 1.1 as a
source of code snippets etc:
EGA/VGA: A programmer's reference guide
By Bradley Dyck Kliewer
McGraw Hill Publishers.
I know this is really retro, but if we can stick to code which is a little
way back down the evolutionary tree of hardware, we might be able to create
'instant' graphics from the BIOS.
What would be crucial is some sort of power-up self-testing function, that
determines what kind of SVGA chipset is present, (only the largest families
considered), and applies different code for each chipset.
Clearly this would be much better hand-coded in C++ rather than assembler;
lest things get icky.
All the best,
From: owner-openbios at freiburg.linux.de
[mailto:owner-openbios at freiburg.linux.de]On Behalf Of Ralph Stickley
Sent: Thursday, August 16, 2001 9:14 PM
To: openbios at elvis.informatik.uni-freiburg.de;
'openbios at freiburg.linux.de'
Subject: RE: [OpenBIOS] New power-up graphics BIOS.
SVGA may be standard, but which chip-set are you using ?
The system setup can be highly unique for each CPU (PII, PIII, Celeron,
Ultra-Low Power, etc),
"co-processor" (440BX, 440TX, et. al.) and/or Super I/O....
These devices must be initialized before DRAM, PCI bus, etc will get
started, even before the Video driver is loaded.
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