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
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