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- Newsgroups: comp.sys.ibm.pc.hardware
- Path: sparky!uunet!newsgate.watson.ibm.com!yktnews!admin!watson!
- From: kaul@vnet.ibm.com
- Subject: Re: [IBM] XGA-2 Specs.
- Sender: @watson.ibm.com
- Message-ID: <1992Nov20.193353.20814@watson.ibm.com>
- Date: Fri, 20 Nov 92 19:33:53 GMT
- News-Software: IBM OS/2 PM RN (NR/2) v0.16 by O. Vishnepolsky and R. Rogers
- Lines: 24
- Reply-To: kaul@vnet.ibm.com
- References: <1992Nov12.231856.19708@watson.ibm.com> <1992Nov17.192803.17037@honte.uleth.ca> <1992Nov18.151039.30545@watson.ibm.com> <1eglqlINNrnm@iskut.ucs.ubc.ca>
- Organization: IBM T. J. Watson Research
-
- In <1eglqlINNrnm@iskut.ucs.ubc.ca> buckland@ucs.ubc.ca (Tony Buckland) writes:
- > This may get flamed as a much-too-FAQ, but I just joined this group.
- > Could someone provide a reference that explains how XGA-2, and for
- > that matter XGA vanilla, differ from SVGA? Thanks.
-
- Quickly put, SVGA is a dumb frame buffer approach to video. You put more
- memory out there on the card, some additional modes on your chip and call
- it SVGA. There's some move in the industry to try and standardize these
- modes, but right now there's not much standardization.
-
- XGA is a coprocessed video card, which means that there's some additional
- support for processing graphics primatives. This offloads some of the CPU
- load and allows for a larger utilization of the system bus by the processor,
- in general. It's also more expandable within the standard (for example,
- right now our chip allows up to 4Mbytes of VRAM on a card, but nobody has
- made a commercial version with more than 1MB that I'm aware of).
-
- There's a book "Power Programming the XGA" that goes into more depth if
- you want it.
- -=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=
- Dick Kaul | My opinions only, not official IBM positions, etc--
- IBM XGA Development | they'd make me wear a suit if I were to speak for IBM.
- Boca Raton, FL | "Shhhh... The maestro is decomposing."
- kaul@vnet.ibm.com
-