27 Oct
2009
27 Oct
'09
4:53 p.m.
On 27.10.2009 14:06, Darmawan Salihun wrote:
What is the BIOS RAM in AMD SB7XX used for?
Is it to buffer the BIOS contents from SPI flash chip prior to execution of the very first instruction?
No.
I recall that it's impossible to execute code directly in an SPI chip.
Yes, but the chipset takes care of the SPI command interface and presents the contents of the SPI chip nicely memory mapped to the CPU, so the CPU can execute the ROM contents directly.
Regards, Carl-Daniel
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