[coreboot] [Fwd: Re: flashrom and the dbm690t]

Marc Jones Marc.Jones at amd.com
Fri Oct 10 19:06:10 CEST 2008

ron minnich wrote:
> I can easily read from the chip on the board.
> But, hot plugging is not working out.
> The basic part is a 49lf008a; putting in 49lf008 or 49lf080 just gets
> reads back of ff.
> Ideas welcome. Do BIos saviours exist any more?

But you can read out the original ROM file? If you switch to FWH
(49lf008a) you will need to set FakeAsrEn [PM_Reg:8Fh] UseBypassRom[1]
and BypassRomSel[3:2].

You can check the range :
LPC ROM Address Range 2 (Start Address)- RW - 16 bits - [PCI_Reg: 6Ch]
LPC ROM Address Range 2 (End Address) - RW - 16 bits - [PCI_Reg: 6Eh]
It should be 0xfffffff0 meaning 0xfff00000-0xffffffff

Rom Protect 0 - RW - 32 bits - [PCI_Reg: 50h]
Should be 0.

That is all I can think of at the moment.


Marc Jones
Senior Firmware Engineer
(970) 226-9684 Office
mailto:Marc.Jones at amd.com

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