[flashrom] Difference of factory bios and dumped image
prakashp at arcor.de
Mon Jan 23 19:55:48 CET 2012
On Saturday 31 December 2011 13:55:45 Idwer Vollering wrote:
> 2011/12/31 Prakash Punnoor <prakashp at arcor.de>:
> > On 31.12.2011 11:39, Paul Menzel wrote:
> >> Am Samstag, den 31.12.2011, 10:55 +0100 schrieb Prakash Punnoor:
> >>> flashrom kind of works on my system, but not with the factory
> >>> images. If I read it out with flashrom and write it back with
> >>> flashrom (also to a different chip) it works. The sizes of factory
> >>> and dumped image are same but they are somewhat binary different.
> >>> Any idea? The motherboard is Abit A-S78H. As I am playing around
> >>> with coreboot - so far unsuccessfully - I want to know whether
> >>> flashrom is writing the generated image correctly... I can upload
> >>> both images somewhere if interested. This is flashrom output on my
> >>> system:
> >>> flashrom v0.9.4-r1395 on Linux 3.2.0-rc7+ (x86_64), built with
> >>> libpci 3.1.7, GCC 4.5.2, little endian
> >>> flashrom is free software, get the source code at
> >>> http://www.flashrom.org
> >>> Calibrating delay loop... OK.
> >>> Found chipset "AMD SB700/SB710/SB750/SB850". Enabling flash write...
> >>> OK. This chipset supports the following protocols: LPC, FWH, SPI.
> >>> Found Macronix flash chip "MX25L8005" (1024 kB, SPI) at physical
> >>> address 0xfff00000.
> >>> No operations were specified.
> >> Unfortunately this question seems not be listed in the FAQ. Most of
> >> the
> >> time some areas differ because the MAC address and other configuration
> >> data of the downloaded images differs . I hope you mean the
> >> downloaded image by factory/vendor image.
> > To clarify:
> > - Image I got from vendor web page: Flashed with flashrom won't work
> > (machine doesn't POST). Flashed with awdflash works.
> Is the bootblock in the downloaded image intact/present? You can use
> bios_extract: http://cgit.freedesktop.org/~libv/bios_extract
> What happens when you reset the CMOS/ESCD data after flashing with
> flashrom? awdflash does that with the /cp parameter, see
For what is worth, I tried flashing dumped file and then factory bios on top.
this worked, so I guess everythign is alright. I'l send a separate mail for
inclusion in wiki.
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