[LinuxBIOS] about programming BIOS Savior

Peter Stuge stuge-linuxbios at cdy.org
Tue Apr 24 23:44:28 CEST 2007

On Tue, Apr 24, 2007 at 09:42:29PM +0200, Stefan Reinauer wrote:
> * Ning (Michael) Qu <quning at gmail.com> [070424 21:30]:
> > And I check the new content after programming Savior. Only the
> > last page are programmed. The total is 8 pages (512K), and only
> > the content from 0x70000 is correctly programmed. What's the
> > problem? Is there something wrong with flashrom?
> Maybe some flash protection that "flashrom" does not know about.
> Can you check the datasheet?

Yes, this is consistent with the WP# pin being held low on the chip.

--8<-- Pm49LF002-004 V1.8.pdf p5
Write Protect: When pulled low, it enables the hardware write
protection to the memory array except the top bootblock. When pulled
high, it disables hardware write protection.

49LF004 has a 64kb top boot block.

If you have a continuity tester, please check if pin 7 (pins are
numbered counter clockwise and pin 1 is the center pin on the side
with a angled top edge) is connected to GND on the mainboard, and/or
if there's a jumper.

You could also check if pin 7 is connected straight through on the
BIOS savior. Maybe they changed their design for some unknown reason.

Oh, and did you try to flash a chip directly on the mainboard? Please
try to write and verify using a few different files.


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