[OpenBIOS] where I'm at with the 440gx and reading nvram
Wallace I. Kroeker
WallaceKroeker at smarttech.com
Fri Jan 28 17:02:30 CET 2000
I am working with the 440BX chipset and have it hobbling along.
I am having problems with the MDA getting any screen output.
I am able to get beeps out for different keys on the keyboard
but no character display. (Of course, this could be just the situation to
use Morse code :-).
Do you have any thoughts as to what might be the problem?
Could I get your 440gx chipset and superio components as a reference?
> -----Original Message-----
> From: Ronald G. Minnich [SMTP:rminnich at lanl.gov]
> Sent: Tuesday, January 25, 2000 10:43 AM
> To: openbios at elvis.informatik.uni-freiburg.de
> Subject: RE: [OpenBIOS] where I'm at with the 440gx and reading nvram
> I'm actually getting somewhere now via a different path.
> I have mmaped 0xffe00000 from /dev/mem and I can see the BIOS. I'm not
> looking at what's in it, but the contents of 0xf0000 and 0xffe00000 do
> This also revealed a bug in the linux do_mmap code: it doesn't correctly
> handle the case of mmap'ing the tail end of memory ...
> Now to try to kick the nvram a little. This will require setting a write
> enable bit in the bridge, which I do know is not set normally. No big
> deal. It's still a mystery to me why the darn thing was not visible
> in-kernel, but oh well: I prefer user-mode code for this sort of thing
> To unsubscribe: send mail to majordomo at freiburg.linux.de
> with 'unsubscribe openbios' in the body of the message
To unsubscribe: send mail to majordomo at freiburg.linux.de
with 'unsubscribe openbios' in the body of the message
More information about the openbios