SST39VF040 on 3COM 3C905C:

[Xavier Bourgeois]

The SST39VF040 is listed as untested on the flashrom supported hardware 
page.

I tried it on a 3Com 3C905C (which limits to 128kbytes).
All operations (probe, read, erase and write were done successfully for 
the first 128kbytes) [0].

I attached the NIC's bootrom [1], which was resized from 64kbytes to 
512kbytes in order to be flashed. I also attached the same image which 
has been read after the flash.
All the first 128kbytes are identical, and the data repeats until the 
end of the file.

The network card is also able to boot from this eeprom.

Thanks,

[0]: http://monorailc.at/tmp/3c905c.tar.gz
[1]: http://monorailc.at/tmp/3c905c_dump.tar.gz

[Stefan Tauner]

On Fri, 18 Sep 2015 14:43:40 +0200
Xavier Bourgeois  wrote:
> The SST39VF040 is listed as untested on the flashrom supported hardware 
> page.
>
> I tried it on a 3Com 3C905C (which limits to 128kbytes).
> All operations (probe, read, erase and write were done successfully for 
> the first 128kbytes) [0].
>
> I attached the NIC's bootrom [1], which was resized from 64kbytes to 
> 512kbytes in order to be flashed. I also attached the same image which 
> has been read after the flash.
> All the first 128kbytes are identical, and the data repeats until the 
> end of the file.
>
> The network card is also able to boot from this eeprom.

Hello Xavier,

thanks for your report!
I have marked the flash chip as fully tested and will commit that later
together with other small changes.
That's a *really* old version of flashrom and testing with programmers
that do not support the full address space is quite risky (often the
errors happen exactly at such boundaries). However, I decided to mark
it anyway because I don't expect any better reports coming anytime soon
(or ever) because of the age of the chip and its apparent rareness.