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Article #321

Re: Why V2 8MB can only do 800x600?

#321
From: Michael Dart
Date: Thu, 28 Oct 1999 00:00
29 lines
1790 bytes
I've seen the math calculation some programer did and it comes up a liitle
short in the proper allocation of memory per processor.
mjdart

Klingon da Prevert! wrote in message <380e85f8.685313@news.mciworld.com>...
>Well then, what about SLI mode, using 2 V2's?
>
>REM
>
>On Thu, 14 Oct 1999 09:22:16 +0100, Andrew Hodgson
><ahodgson@nortelnetworks.com> wrote:
>
>>You need a certain number of bytes free in the framebuffer to do
>>Z-buffering on a Voodoo2. When you're in 1024x768 resolution the memory
>>requirements for a double buffered display (essential for games) & Z
>>buffering are as follows:
>>
>>Memory needed for display (16-bit colour depth):
>>(1024x768x16x2)/8 = 3,145,728 bytes (the 2 is for double buffering)
>>= 3MB
>>
>>Memory needed for Z (16-bit Z on a V2):
>>(1024x768x16)/8 = 1,572,864 bytes
>>= 1.5MB
>>
>>3+1.5 = 4.5 > 4MB therefore no Z buffer can be used.
>>
>>Andrew
>
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From: "Michael Dart" <mjdart@bellsouth.net>
Subject: Re: Why V2 8MB can only do 800x600?
Date: 1999/10/28
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