[flashrom] External programmer update
Sean Nelson
audiohacked at gmail.com
Sat Jun 19 23:04:21 CEST 2010
On 5/28/10 9:48 AM, fritz wrote:
> However, the chip I wanted to program - Am29F040B - I could NOT detect.
>
> I'll spare you the in-depth story of the past twelve hours I've spent
> working on it.
>
> The summary:
> Flashrom (from svn) would detect the other chips using addresses
> 0x5555, 0x2AAA, 0x5555
> Flashrom (from svn) would try to detect the Am29F040 using addresses
> 0x0555, 0x02AA, 0x0555 - which is not according to the datasheet.
>
The Problem is the Am29F040B uses 0x2AA variant, but the Am29F040 uses
0x2AAA. What AMD/Spansion did was change the command addresses without
changing the chip ids. Sadly there's no way to distinguish between the two.
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