Re: Graphics Accelerator Cards

Article View: comp.sys.ibm.pc

Article #14083

#14083

From: Per Fredrik Solberg
Date: Fri, 20 Nov 1992 22:15

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In article <1992Nov19.094530.5007@news.uni-stuttgart.de> skok@itwds1.energietechnik.uni-stuttgart.de (Holger Skok) writes:

> Due to the antiquated hardware design of the PC the CPU has to put the
> image onto the Windows screen pixel by pixel and all that via the slow
> AT-bus. 640x480x256 - that's a lot of info to be put into the VRAM on
> your card (How many MB does that amount to, by the way? I could never
> get that right). And that takes TIME.
> >
> For a quick fix, try switching to the plain vanilla VGA-driver included
> with Windows. That'll only give you 16 colours, but at the same time it
> reduces the amount of info on the screen by a factor of 16. Consequently
                                                          ^^
Not quite. 256 colors require 1 byte per pixel, whereas 16 colors
require 4 bits per pixel; thus, the amount of video data is only
reduced by a factor of 2.

> things like scrolling are a lot speedier.
> 
> HSK


Per Solberg
pso@si.no / perfred@idt.unit.no

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References: <1992Nov17.213906.504@cbnewsh.cb.att.com> <1992Nov19.094530.5007@news.uni-stuttgart.de>

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Path: arc1-ca.pugleaf.net!sparky!uunet!dtix!darwin.sura.net!paladin.american.edu!news.univie.ac.at!hp4at!mcsun!sunic!aun.uninett.no!ugle.unit.no!ugle.unit.no!perfred
From: perfred@gullregn.idt.unit.no (Per Fredrik Solberg)
Newsgroups: comp.sys.ibm.pc,comp.sys.ibm.pc.hardware,comp.sys.ibm.pc.misc
Subject: Re: Graphics Accelerator Cards
Message-ID: <PERFRED.92Nov20171529@gullregn.idt.unit.no>
Date: 20 Nov 92 22:15:29 GMT
References: <1992Nov17.213906.504@cbnewsh.cb.att.com>
 <1992Nov19.094530.5007@news.uni-stuttgart.de>
Sender: news@ugle.unit.no (NetNews Administrator)
Organization: Div. of CS & Telematics, Norwegian Institute of Technology
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In-Reply-To: skok@itwds1.energietechnik.uni-stuttgart.de's message of Thu, 19 Nov 1992 09:45:30 GMT

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