On 03.03.2008 07:10, Jun Ma wrote:
[MJ] for my poor board SIS5595/W49F002U, there seems no WP# function, you can get DS from: http://www.winbond-usa.com/products/winbond_products/pdfs/Memory/w49f002u.pd...
There is a write protection function in the W49F002U: #WE, but the signal is inverted.
Can you guide me in a better direction? I will try my best on this test.
In order to find out about the GPIO you can either:
- Use a multimeter to check if any GPIO pin on the southbridge is
connected to the flash chip write protect
- Save all GPIO registers from booting with factory BIOS
Compare with GPIO registers from booting with coreboot Set one GPIO register bit at a time and test if flashrom can identify the flash chip automatically. (That requires write to work correctly.)
[MJ] I suppose that there has no WP# pin on W49F002U, so there should not have any GPIO pin connected between South bridge and BIOS.
See above.
Regards, Carl-Daniel