2014-01-16 9:22 GMT+01:00 Hans-Martin Roßmann <ha-ma.rossmann@gmx.net>:

Hey there…

first of all: Thank you for that incredible flashrom tool.
But sadly: I can not write my BIOS chip on my Jetway Board.

I got a Jetway NC96FL Mainboard with a Winbond W25Q80BV BIOS Chip, Intel NM10 Chipset and running Ubuntu 10.10.
Flashrom detects the chip and the chipset well, but can not disable block protection. So it is not possible to write.

I also tried to flash the chip with the Serprog/Arduino-Flasher on an Arduino Uno and it works. (But I want to burn it with my Jetway Board.)
Then I tried to write it in my Jetway Board with manual raising the /WP-Pin of the Winbond Chip to VCC and it works too.
So is it something (GPIO) to raise the /WP-Pin in the chipset?

Can somebody help me?

The write protection is applied/released by code in the bootblock (or however EFI does that, nowadays)

You can retrieve the bootblock with bios_extract: http://review.coreboot.org/gitweb?p=bios_extract.git;a=summary

Here are some writeups that can get you on the right track.
http://flashrom.org/Laptop_enable
http://flashrom.org/Finding_Board_Enable_by_Reverse_Engineering
http://flashrom.org/Board_Enable

I attached the logs from:
$ flashrom -p internal -w flash.rom (write.log)
$ flashrom -p internal -V (flash.log)
$ lspci -nnvvxxx (lspci.log)
$ superiotool -deV (superio.log)

Thanks a lot,

Hans-Martin

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