Date: Sun, 7 Oct 2007 18:41:08 -0600 (MDT) From: Warren Block <wblock@wonkity.com> To: freebsd-x11@freebsd.org Subject: Re: Using /dev/mem to read video BIOS ROM Message-ID: <20071007183313.O1942@wonkity.com>
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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. * http://lists.freedesktop.org/archives/xorg/2007-October/029005.html -Warren Block * Rapid City, South Dakota USA
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