Re: [coreboot] Dualbios on GA-MA770-UD3

[Stefan Reinauer]

On 4/24/10 8:26 PM, Patrick Georgi wrote:
> They might just use a watchdog:
> BIOS 1 sets a flag
> BIOS 1 configures the watchdog to trigger when it's not touched within
>
> 2 seconds (or whatever). watchdog would reboot the system then
> BIOS 1 jumps in BIOS 2
> BIOS 2 does whatever it needs to do to consider itself "safe"
> Meanwhile, BIOS 2 touches the watchdog every so often
> BIOS 2 deactivates the watchdog
>
> In this scenario, coreboot would have to know how to tell the watchdog
> to reset its countdown, and how to disable the watchdog, to safely use
> the Dual BIOS feature.

And the way to find out would be SerialICE:

http://www.serialice.com/

Best regards,
Stefan