Using /dev/mem to read video BIOS ROM
wblock at wonkity.com
Sun Oct 7 17:41:10 PDT 2007
Following up to my own question:
No, you can't just read a video BIOS ROM directly. The main video card
BIOS is at 0xc0000 because it is shadowed there. To read a BIOS ROM
directly from the card, you have to enable the ROM and map it into an
area of memory.
The good news is that Xorg already has routines to do this, and with a
small fix*, they work correctly on FreeBSD.
-Warren Block * Rapid City, South Dakota USA
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