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

[Antonio Expósito]

I have seen the supported motherboard list/status, and there are several VIA
motherboards with chipsets of the same family but different models.

 

Is it difficult to adapt one of them to my motherboard? (AMOS-3000 embedded
computer with P700 motherboard)

 

I have located the following chips:

 

VIA NOR/SOUTH BRIDGE VX700

VIA SUPER I/O LITE VT1212

VIA HD AUDIO VT1708B

VIA ETHERNET CONTROLLER VT6107 /VT6122 

TI RS-232 MAX3243

ANALOG DEVICES HW MONITOR ADM1032

ICS CLOCK SYNTHESIZER ICS952906 (I don’t know what is this)

 

Perhaps I can help, which are the first steps?

 

Any doc for a new guy?

 

This is my hobby, but I am really enthusiastic.

 

Thanks,

 

Antonio

 

 

De: Myles Watson [mailto:mylesgw at gmail.com] 
Enviado el: jueves, 17 de septiembre de 2009 21:23
Para: Antonio Expósito
CC: coreboot at coreboot.org
Asunto: Re: [coreboot] BIOS POST codes monitoring in real time from other
computer

 

 

2009/9/17 Antonio Expósito <antonio.exposito at ono.com>

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

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