[coreboot] Unable to flash Pm49FL004

Corey Osgood corey.osgood at gmail.com
Wed May 7 19:15:58 CEST 2008

Check in the factory BIOS that BIOS write protect is set to off. If there is
no such option, then you might have to do some work to turn the BIOS write
protection off.  Check the flashrom board enables for other vt8237r-based
boards (epia cn, etc) for hints.


On Wed, May 7, 2008 at 9:28 AM, Richard Stellingwerff <remenic at gmail.com>

> Hi all,
> I finally got myself a PLCC extractor so I can start getting coreboot
> to work on my Jetway J7F4K1G2E-PB board. However, I'm already running
> into a problem trying to write the original bios on the Pm49FL004.
> Extracting the BIOS from the original ROM works fine, but trying to
> write it into the new chip (after hot-swapping them) results in this:
> # flashrom -wv backup.bin
> Calibrating delay loop... OK.
> No coreboot table found.
> Found chipset "VIA VT8237", enabling flash write... OK.
> Pm49FL004 found at physical address 0xfff80000.
> Flash part is Pm49FL004 (512 KB).
> ===
> This flash part has status UNTESTED for operations: PROBE READ ERASE WRITE
> Please email a report to flashrom at coreboot.org if any of the above
> operations
> work correctly for you with this flash part. Please include the full
> output
> from the program, including chipset found. Thank you for your help!
> ===
> Flash image seems to be a legacy BIOS. Disabling checks.
> Programming page: 0007 at address: 0x00070000
> Verifying flash... FAILED!
> Reading from the Pm49FL004 returns all FF's (checked with hexedit).
> I compiled flashrom myself from SVN a few minutes ago.
> Anyone know what I can do?
> Kind regards,
> Richard Stellingwerff.
> --
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