[LinuxBIOS] any chance to get X fbdev driver to work ?

Ronald G Minnich rminnich at lanl.gov
Wed Dec 28 15:39:17 CET 2005

Christian Sühs wrote:

> It seems that the content on 0x0c0000 is not the same as the vgabios
> Only the first (between Offset 0x00 and Offset 0x7f) words are the same. 
> The rest differs from vgabios (Offset 0x80 - 0xFFFF). That is the reason 
> why X detects a valid vga-Bios section on Offset 00 and 01 (55aa) and 
> the rest fails.
> Now, I will have a look why this happens.
> Any hint?

as ollie has mentioned, VGA bios are frequently self-modifying code. 
Once the system is up, you are looking at the code AFTER 
self-modification has happened.

PCs are disgusting.


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