Re: [coreboot] BIOS POST codes monitoring in real time from other computer

[Myles Watson]

2009/9/17 Antonio Expósito
> I am trying to monitor the boot process of a computer, mainly BIOS POST
> codes and linux kernel boot process. I know how to do it for the linux
> kernel using a serial port, but I am not able to imagine how to monitor the
> BIOS POST codes.
>
> I know that almost every BIOS sends them to the ISA I/O address 0080h, but,
> how can I get that codes using another computer? I mean,  without POST
> ISA/PCI card, using another computer connected to it via SMBUS, LPC or
> serial?
>
> Is there any way to convert LPC to serial and monitor that port?

I don't know of an easy way.
> I want to do this with a VIA P700 motherboard, is this board supported by
> the coreboot v3?

http://www.coreboot.org/Supported_Motherboards
I don't think so.  Coreboot v2 is the most active branch.
> Could be easy to redirect BIOS POST codes to a serial port using a coreboot
> implementation?

Coreboot sends debug information to the serial port, so there is no need for
monitoring the POST codes except very early in the boot process.

Thanks,
Myles