[coreboot] C720 - ROM file

[Aaron Durbin]

Hi Carmelo,


On Tue, Feb 4, 2014 at 2:30 AM, Carmelo Ingrao <carmelo at ingrao.fr> wrote:
> -----BEGIN PGP SIGNED MESSAGE-----
> Hash: SHA512
>
> Hello,
>
> I'm new here and I hope I don't do anything wrong posting my question
> here ...
>
> So I have a C720P, and I wanted to have the blank nag screen only for
> 1 second : I have unscrewed the write protect screw, and in dev mode I
> have done this :
>
> sudo set_gbb_flags.sh 0x489
>
> I didn't received any error message, but now I can't have SeaBIOS
> anymore ...

SeaBIOS was loading correctly until you changed the GBB flags, right?
And CTRL+L is just not being detected any longer? Can you change the
GBB flags back and determine if the legacy booting still works?

>
>
> I have read online it may be caused by the wipe of SeaBIOS part in the
> ROM.

It's possible. Since you are in dev mode, could you run the following?
' iotools mmio_dump 0xffc00000 0x200000 -b | hexdump -C' It will dump
the contents of legacy portion of the flash. We'd know for certain if
the area is wiped.

>
> I need :
> - - reinstall SeaBIOS, I have found this
> http://permalink.gmane.org/gmane.comp.bios.coreboot.seabios/7572 but I
> don't understand what "For those interested in reproducing, it will
> require the very latest
> seabios from the git repo." stands for ..
>
> - - Or maybe I can write ALL the bios file, but I need someone intact
> one ... So if someone very kind can on his C720P  launch this command
> :"sudo flashrom -r /tmp/image.rom" and send me the file it'll save my
> day :)

That would work or, alternatively, you could build  a SeaBIOS image
yourself and write to the area. I think we should determine if the rom
area is wiped or not first.
>
> Thanks for reading, and I hope it's ok to ask this question here.
>
> Carmelo
>
> -----BEGIN PGP SIGNATURE-----
> Version: GnuPG/MacGPG2 v2.0.20 (Darwin)
> Comment: GPGTools - https://gpgtools.org
> Comment: Using GnuPG with Thunderbird - http://www.enigmail.net/
>
> iQIcBAEBCgAGBQJS8KUuAAoJELZV+OMrLOztPA0P/j5Lfy7uECnog4HMslLbVutM
> LGX3hUuoavRRQ3+WIzC3d9H+A22zGSDp8013WjSLsezw9VVnwom0nezdqNqk6wod
> 8N1rlnYc/MBRnNM3sBFzXZ6xurlGn9Ox0b4cvZn0YQxrCcwA51t5Sxv5BmGxoKTO
> iysxHJFJUjv/Bx8TDgmBC3vpmIyznbGCpX0RJYhXAzjTSclVbAHRlFF1oWDlgvfe
> +ODnPX9RpbVsUj2J5dBIO/HBdj1wVjk76l7rixXUDZldJUEEfT+NqyT6afYQxkjX
> jOYlRV7jbK35hLfoZESgb4qoLqSfYsHO382TjdA29KshfPtulFzzipuCE7B8+wf7
> +D/uSL6qPg0fWMytF0mw57Q6KAIsv2L8pLJhHQzLRc72B+Iwa2EwJR4xe23wrtU9
> IhbHZASR5MYJJnNgsKGuYxZl2cgC19knySMw8qrP+WJHbW6JMaIAtmHpJ7/KCGl2
> bfvI2mClCWnKtQr1IgnrJ/I7O4KeAULcNWncwmuIdcaW4/41FXT57YOngc4kFGzO
> JhVnnxJJ5hft7ayFvSyFIUNMRRlrjQ8IAzRqKX/JdjecmnAVCuxSUqnqtxMJkDhG
> 1ydT9nEjtT0WKxkoLyUdyC7Fp7ZIGR1OpFZIpvuUWyps+L0Wjie2RWXhhEaSYk48
> da9vbaJDDf550Bu9xJFe
> =jc6k
> -----END PGP SIGNATURE-----
>
> --
> coreboot mailing list: coreboot at coreboot.org
> http://www.coreboot.org/mailman/listinfo/coreboot