Mapping Video BIOS?

M. Warner Losh imp at
Sun Jul 27 20:44:41 PDT 2003

In message: <20030728032653.GA37499 at>
            "Greg 'groggy' Lehey" <grog at> writes:
: On Saturday, 26 July 2003 at 22:18:59 -0600, M. Warner Losh wrote:
: > In message: <20030727015903.GJ45069 at>
: >             "Greg 'groggy' Lehey" <grog at> writes:
: >> Presuming that it's the ROM driver, I get this in the dmesg I posted:
: >> pnpbios: Bad PnP BIOS data checksum
: >
: > That's likely the problem.  However, PnP BIOS information isn't the
: > same thing that the orm[sic] driver probes for.
: They look related.  I've now found the orm output:
:   orm0: <Option ROMs> at iomem 0xe0000-0xe3fff,0xdf800-0xdffff,0xd0000-0xd17ff,0xc0000-0xcefff on isa0
: The last one is the video BIOS.  It's interesting to note that it
: doesn't report the 4 kB BIOS at 0xcf000, which suggests that at this
: point the 16 kB area is already unmapped.  

Hmmmm, The list comes from scanning the "ISA HOLE" for certain memory
signatures.  These signatures have a length in them that say "I'm a
rom that's X long".  I don't think that it suggests that things are

: I've worked around the problem by compiling the video BIOS into the X
: server and not trying to access the BIOS in the machine.  Obviously
: not a solution, but it works for the moment.  I'd really like to track
: down the problem.  Does anybody have an idea?

I don't, I'm sorry.


More information about the freebsd-current mailing list