[OpenBIOS] where I'm at with the 440gx and reading nvram

[Wallace I. Kroeker]

Ron,

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?

Thanks
Wallace

> -----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
> match.
> 
> 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
> anyway.
> 
> ron
> 
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