Re: [flashrom] Erasing on Asus M2N68-VM

[Michael Karcher]

Am Freitag, den 04.12.2009, 01:00 +0100 schrieb Michael Karcher:

some speculations, as guessing is cool:
> To select the BIOS ROM:
> Set bit 0 in the bitbang register

wild guess: This disables an chipset-internal SPI interface used for a
read-only mapping of the flash rom to the processor address space. But
it does not abort a transaction if it is running.
> Wait for bit 8 to be set (this is the *only* word access to the
>
> bitbang register, everything els is bytewise)

wild guess: This bit indicates that the chipset-internal SPI is idle.
> Clear bit 1 in the bitbang register

wild guess: This bit enables bit-bang access to the SPI interface.

Regards,
  Michael Karcher