From: beppu AT rigel DOT oac DOT uci DOT edu (John Beppu)
Newsgroups: comp.os.msdos.djgpp
Subject: Re: HELP: vesa 2 & linear framebuffering
Date: 9 Apr 1997 01:15:10 GMT
Organization: University of California, Irvine
Message-ID: <5ieqiu$m9t@news.service.uci.edu>
References: <5id9j3$6sb AT news DOT flashnet DOT it>
NNTP-Posting-Host: rigel.oac.uci.edu
Lines: 24
To: djgpp AT delorie DOT com
DJ-Gateway: from newsgroup comp.os.msdos.djgpp

In article <5id9j3$6sb AT news DOT flashnet DOT it>,
Cristiano Muzi <reboot AT fr2 DOT flashnet DOT it> wrote:
>
>PS:  Perhaps my problem is a problem of bios or videocard. A demo of
>Allegro 2.2 and a test program crash my pc when they try to use linear
>addressing :((
>
>I have a dx2/66, a vlb cirrus logic 5428 and I use univbe 5.1.  Is
>here my problem ??
>

  I also have a dx2/66 and a vlb cirrus logic 5428.  If you have
  more than 16MB of RAM, your cirrus logic will turn stupid on
  you and won't know how to map its memory to a linear frame
  buffer for your use.  According to the documentation from
  XFree86 (an X Server for Linux), the cl5428 likes to map its
  LFB at somewhere around 14MB or 16MB.  I'm not sure about the
  exact details, but the main point was that system memory
  overlapped with where the LFB was mapped to, and that's apparently
  not a Good Thing.

  
-- 
  beppu AT uci DOT edu .............................................................