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- Newsgroups: comp.os.linux
- Path: sparky!uunet!uchinews!ellis!besp
- From: besp@ellis.uchicago.edu (anna besprozannaya)
- Subject: Support for multiple video cards (was Last Message to All)
- Message-ID: <1992Jul23.015706.29245@midway.uchicago.edu>
- Sender: news@uchinews.uchicago.edu (News System)
- Reply-To: besp@midway.uchicago.edu
- Organization: University of Chicago Computing Organizations
- References: <1992Jul18.165007.23381@mnemosyne.cs.du.edu> <1992Jul18.183600.22257@athena.mit.edu>
- Date: Thu, 23 Jul 1992 01:57:06 GMT
- Lines: 22
-
- In article <1992Jul18.183600.22257@athena.mit.edu> jnewbern@athena.mit.edu (Jeffrey L Newbern) writes:
- >
- >The reason that it is not trivial to add support for new video cards is
- >that the cards are not hardware compatible. Typically, each manufacturer
- >designs the card a little different, and often those differences are
- >sufficient to make the hardaware incompatible. Normally, these
- >differences don't show up, because the video BIOS corrects for the
- >inconsistencies. For example, two VGA cards may use different chips, but
-
- A while ago I was doing system administration on SCO system ;-{ and was
- surprised by their innovative approach to handling different video cards.
- The way I understood it, their video driver uses a runtime configuration
- file, which tells it how to put a particular video card into video modes
- the card is capable of runig. It looked somewhat like:
-
- 1024x768x8:
- { outport(0x123, 0x56); outport(0x789, 0xab); ... }
-
- This file also described "capabilities" of the mode, much as /etc/termcap
- does. I know very little about video cards / drivers.
- Does it make sense and is it a good idea ? And does SCO _new__X11R4_ server
- really runs that way ?
-