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- Newsgroups: comp.graphics
- Subject: Re: Vesa information wanted
- Message-ID: <1992Nov16.160137.1@ualr.edu>
- From: djlewis@ualr.edu
- Date: 16 Nov 92 16:01:37 GMT
- References: <andreasa.72.721669364@dhhalden.no>
- Organization: University of Arkansas at Little Rock
- Nntp-Posting-Host: spider.ualr.edu
- Lines: 52
-
- In article <andreasa.72.721669364@dhhalden.no>, andreasa@dhhalden.no (ANDREAS ARFF) writes:
- > Hello Netters.
- >
- > I was wondering if somebody had a bios map, complete with addresses and
- > address descriptions, for the vesa svga standard, or does vesa svga use the
- > same bios addresses as vga.
- >
- > And I'am also wondering if the vesa standard is available at any anonymous
- > ftp site, which I belive would contain most of the bios information I want.
- >
- > And to the last: do I have to care about the screenmemory-windows and/or the
- > read/write flag, or can I access any pixel in any way(r/w), and using
- > whatever operation my mind feels free to at any moment on this, any, pixel.
- > I've heard that this is the case for mode 0x105, but is it true for all
- > available modes, or just 0x105?
- >
- > Arff
- > "Also for the not religous confessor, there is a mystery of higher values,
- > who's birth mankind - to the last - builds upon. They are indisputible. And
- > often disregarded. Seldom you hear them beeing prized, as seldom as you hear
- > a seeing man prizeing what he sees." Per Lagerkvist, The Fist
- > (Free translation from Swedish)
- > --Andreas Arff andreasa@dhhalden.no--
- I have ordered the VESA standards from VESA and they sent a free packet
- including a 5.25" diskette containing nothing later than 1991 tsr's by
- manufacturers.
- The info is helpful but by no means a total method for programing the
- VESA std. Randy Buckland posted a 'C' / 'ASM' VESA program that is a good
- starting point to understanding VESA but it only seems to work on his video
- board. I have been hacking away at it to make it more universal the last
- few evenings.
- The window switching problem still exists. There is no simple
- poke / write pixel at any location in the video memory without memory
- management techniques. The VESA calls are simply there to standardize the
- means of getting video card info and calling the card. Through VESA std's
- your software "should be able to work with any VESA ready card" if you
- follow the guidelines. call 0x4F00 returns certain Information and call
- 0x4F01 returns more. All this info is used to write the routines for proper
- access of the VESA card's video ram.
- The above text is highly abreaviated as I am slowly acquireing
- this VESA concept myself.
-
- VESA Electronics Standards Association
- 2150 North First Street, Suite 440
- San Jose, CA 96131-2020
-
- (408) 435-0333
- FAX (408) 435-8225
-
- Thanks,
- Don Lewis
- djlewis@ualr.edu
-