[coreboot] BIOS POST codes monitoring in real time from other computer
antonio.exposito at ono.com
Thu Sep 17 21:52:27 CEST 2009
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 dont 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.
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
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
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?
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
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.
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