On 17-Feb-00 Mike Smith wrote:
>>
>> On 17-Feb-00 Mike Smith wrote:
>> >>
>> >> On 16-Feb-00 Mike Smith wrote:
>> >> >> This is a problem with the thinkpad BIOS that I have not had the time to be
>> >> >> able to track down. It would *appear* to be that the BIOS does not do
>> >> >> int 13 handling on boot cdroms, and the boot/loader makes much use of that
>> >> >> for loading the kernel and drivers.
>> >> >
>> >> > The problem with the Thinkpad BIOS is where it puts the emulated floppy
>> >> > image's disk number - it's not in the 'normal' place, and I don't exactly
>> >> > know how to deal with it cleanly. If someone were to lend me a thinkpad
>> >> > or look at this it would be easy to fix.
>> >>
>> >> Err, which place? The emulated device is always BIOS drive 0x00, aka the
>> >> first floppy drive when you are emulating a floppy.
>> >
>> > It's not, which is the "Thinkpad CDROM boot problem". The one report I
>> > recall put it on 0x87, but I don't have any concrete evidence to suggest
>> > that it's always there either.
>>
>> Gah. Then they need to learn how to read standards. It is passed in via %dl
>> at least?
>
> After David's response, I'm wondering whether the problem isn't that they
> _arent_ passing the value in via %dl, and we're just getting trash. Not
> sure how it is that boot1/2 are working though.
I don't think boot1/2 would work at all if %dl was wrong. One thing to note, is
that when I finally get cdboot working to the point of loading the loader, I am
going to have a similar problem since the device number typically used when booting
from a CD is 0x9f, which is not contiguous from 0x80.
--
John Baldwin <[EMAIL PROTECTED]> -- http://www.FreeBSD.org/~jhb/
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