Asus P2B-N

[Mattias Mattsson]

Hi,

I'm using latest flashrom (r1070) on an Asus P2B-N h/w rev. 1.04.
Unfortunately it can't find the flash chip.
(It's a MVC V29C51002T-90P).

Output from flashrom, superiotool and lspci attached.

-mattias

[Carl-Daniel Hailfinger]

Hi,

On 08.07.2010 06:35, Mattias Mattsson wrote:
> I'm using latest flashrom (r1070) on an Asus P2B-N h/w rev. 1.04.
> Unfortunately it can't find the flash chip.
> (It's a MVC V29C51002T-90P).

That's pretty odd. Either the writes are not passed through to the chip,
or another probe sequence irritated it too much. You chipset talks
directly to the Parallel flash chip AFAICS.
> DMI string baseboard-manufacturer: "ASUSTeK Computer INC."
> DMI string baseboard-product-name: "P2B-N"
> DMI string baseboard-version: "REV 1.xx"
> DMI string chassis-type: "Unknown"
> Found chipset "Intel PIIX4/4E/4M", enabling flash write... chipset PCI ID is 8086:7110, OK.
> This chipset supports the following protocols: Parallel.
> [...]
> Probing for Winbond W49F002U, 256 KB: probe_jedec_common: id1 0x22, id2 0xfd, id1 parity violation, id1 is normal flash content, id2 is normal flash content
> [...]
> No EEPROM/flash device found.

Could you perform a cold boot (including removing the power plug), and
run flashrom exactly once after boot with the following command line:

flashrom -V -c W49F002U

That should give us more hints why the ID of your chip doesn't show up
at all.

Regards,
Carl-Daniel

[Mattias Mattsson]

On Thu, Jul 8, 2010 at 11:20, Carl-Daniel Hailfinger
 wrote:
> On 08.07.2010 06:35, Mattias Mattsson wrote:
> > I'm using latest flashrom (r1070) on an Asus P2B-N h/w rev. 1.04.
> > Unfortunately it can't find the flash chip.
> > (It's a MVC V29C51002T-90P).
>
> That's pretty odd. Either the writes are not passed through to the chip,
> or another probe sequence irritated it too much. You chipset talks
> directly to the Parallel flash chip AFAICS.
> > DMI string baseboard-manufacturer: "ASUSTeK Computer INC."
> > DMI string baseboard-product-name: "P2B-N"
> > DMI string baseboard-version: "REV 1.xx"
> > DMI string chassis-type: "Unknown"
> > Found chipset "Intel PIIX4/4E/4M", enabling flash write... chipset PCI ID is 8086:7110, OK.
> > This chipset supports the following protocols: Parallel.
> > [...]
> > Probing for Winbond W49F002U, 256 KB: probe_jedec_common: id1 0x22, id2 0xfd, id1 parity violation, id1 is normal flash content, id2 is normal flash content
> > [...]
> > No EEPROM/flash device found.
>
> Could you perform a cold boot (including removing the power plug), and
> run flashrom exactly once after boot with the following command line:
>
> flashrom -V -c W49F002U

Sure, no problem. Output attached.

I found a datasheet for V29C51002T/V29C51002B. Maybe it can be of help?
http://www.ezoflash.com/datasheets/flash/Mosel_Vitelic/V29C51002.pdf

-m