[coreboot] flashrom touches only 0x70000-0x80000 addresses of my bios flash

Carl-Daniel Hailfinger c-d.hailfinger.devel.2006 at gmx.net
Fri May 29 13:40:41 CEST 2009

On 28.05.2009 21:04, Alexander Gordeev wrote:
> On Thursday 28 May 2009 15:58:16 Carl-Daniel Hailfinger wrote:
>> On 27.05.2009 21:31, Alexander Gordeev wrote:
>>> I also found the SuperIO pin, which is connected to WE pin of flash: it
>>> is pin 71, PSIN/GP45 as I've learned from the datasheet. However, I was
>>> only able to find it8712f datasheet which may be a bit different from
>>> it8712f-a. You can obtain a foto of the chip from here:
>>> http://lvk.cs.msu.su/~lasaine/it8712f-a.png
>>> The pin is marked.
>> Wow, that's very precise and helpful information. Thanks!
> I did my best :)

Could you also trace the WP# (and TBL#) pin? It seems that my first
attempt to guess the right pin was incorrect.

>>> I'll be happy to provide any additional information if needed.
>> Can you please run
>> superiotool -de
>> and post the output to the list? That will help me use the correct
>> polarity for the write enable routine.
> Sure, attached.

Great, thanks!

Decode follows.
GPIOs: 11(SIO), 12(inverted), 13, 14(SIO), 16(SIO), 17(SIO), 35(pullup),
40(pullup), 53
all SIOs are Input
SIO base: 0x0800

That leads me to the assumption that the WP# pin is probably not
connected to the SuperIO and the WE# pin may be connected to the
SuperIO, but without function.



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