Ok, case closed.
Found answer here: http://forum-en.msi.com/index.php?topic=95357.0
quoting: The difference between SST49LF004A and SST49LF004B is that the 4B version supports LPC / FWH Flashing, 4A version can not handle this.
I knew SOMETHING about this, but thought it is not my case.
This might be useful information in FAQ. Also, more complete explanation might be found here: http://www.rom.by/Art_of_BIOS_flashing
By the way, is it possible to add bios chip information (type) to support list?
And how about 'soldering' write-enable? As in last link i found there is a pad (#23) called "Write Enable". It might be possible to cut off this line from motherboard solder 'programmable voltage', and program bioses on not-enabled mainboards. Is that correct?
Best regards!
2013/10/17 san san@plusnet.pl
i propably should add verbose...
2013/10/17 san san@plusnet.pl
Hi!
Recently i bought mainboard compatible to flashrom.pinned oryginal bios (SST49LF004B) and other chips. I do not own exacly same chip, so i tried to replace with some i have:
SST49LF004 / 4A (and smaller 2A and 3A) Intel 82802AB8
but no luck - i can not even read those. I replaced back the original chip and i am able to program modified bios.
What is the problem?
Best regards!
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