[SerialICE] Bricking (and unbricking) your board.
Joseph Smith
joe at settoplinux.org
Wed Jul 7 00:28:54 CEST 2010
On 07/06/2010 05:58 PM, Myles Watson wrote:
> I was surprised how easy it was to brick my board. These ideas might
> be useful to somebody:
>
> Before you start messing with PCI& I/O values that might keep their state:
>
> - have a lspci -vvvxxx from the factory BIOS
> - record as much of the boot process from the factory BIOS as possible
>
> I wanted to collect the bit masks from my factory BIOS, so I modified
> the filter to return 0x0 and then 0xffffffff for the PCI registers.
> That way I could see which bits were being changed. After some of the
> registers were changed, I couldn't boot the board with Coreboot or the
> factory BIOS. I used SerialICE to set the PCI values to what they
> were in a saved run of the factory BIOS, and it booted again.
>
Wow that is interesting. Even after you disconnected power (ATX
connector) and cmos battery it would still keeps those values?
--
Thanks,
Joseph Smith
Set-Top-Linux
www.settoplinux.org
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