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Date: Sun, 27 Jul 2003 21:42:35 -0600 (MDT)
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To: grog@FreeBSD.org
From: "M. Warner Losh" <imp@bsdimp.com>
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Subject: Re: Mapping Video BIOS?
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In message: <20030728032653.GA37499@wantadilla.lemis.com>
            "Greg 'groggy' Lehey" <grog@FreeBSD.org> writes:
: On Saturday, 26 July 2003 at 22:18:59 -0600, M. Warner Losh wrote:
: > In message: <20030727015903.GJ45069@wantadilla.lemis.com>
: >             "Greg 'groggy' Lehey" <grog@FreeBSD.org> 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
'unmapped'...

: 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.

Warner