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Article #321Re: Why V2 8MB can only do 800x600?
From: Michael Dart
Date: Thu, 28 Oct 1999 00:00
Date: Thu, 28 Oct 1999 00:00
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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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X-Google-Language: ENGLISH,ASCII-7-bit X-Google-Thread: 10320c,6fa70b3349af8b44 X-Google-Attributes: gid10320c,public X-Google-Thread: 10ec8c,6fa70b3349af8b44 X-Google-Attributes: gid10ec8c,public X-Google-Thread: f4bb2,6fa70b3349af8b44 X-Google-Attributes: gidf4bb2,public From: "Michael Dart" <mjdart@bellsouth.net> Subject: Re: Why V2 8MB can only do 800x600? Date: 1999/10/28 Message-ID: <gUZR3.7356$l22.56760@news1.mia> X-Deja-AN: 541671462 References: <OKeN3.2098$AX.75933@news1.rdc1.ab.home.com> <380592B8.D98FF51E@nortelnetworks.com> <380e85f8.685313@news.mciworld.com> X-MimeOLE: Produced By Microsoft MimeOLE V4.72.3155.0 X-Trace: news1.mia 941124236 216.77.208.193 (Thu, 28 Oct 1999 11:23:56 EDT) NNTP-Posting-Date: Thu, 28 Oct 1999 11:23:56 EDT Newsgroups: comp.sys.ibm.pc.hardware.video,3dfx.products.voodoo2,3dfx.products.voodoo3