Re: Debugging the linuxBIOS code

[Deepak Kotian]

Thanks for the information, Andrew.
Correct, this would be good in case machine hang.
But still it should be very useful.

May be in future , a smart
"POST code" could have some small internal buffering
with some kind of manual switch to move up and
down the display to track the code.
This may or may not sound sense , but just a thought.

Regards
Deepak

----- Original Message -----
From: "Andrew Ip" 
To: 
Cc: ; ;

Sent: Wednesday, April 23, 2003 11:34 AM
Subject: Re: Debugging the linuxBIOS code
> Deepak,
> > Thanks. I like this list for it's good responses.
> > Could you please elaborate on "POST card", what is it exactly ?
> > You are correct, I do not have a simulator.
>
> It is a PCI card which displays the value of port address 80.  In
> LinuxBIOS source, it is not hard to find, eg.
>
> intel_chip_post_macro(0x11)
>
> It will dump 0x11 to port 80, and POST card will display 11 on its
> LED.
>
> While debugging, you can record the value and search thru the source
> to see where LinuxBIOS hangs.  However, you can't do backtracing with
> this device.
>
> -Andrew
>
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