[flashrom] 3C905CX-TX-M not supported (But flashrom thinks it is).

[Marko Kraljevic]

Carl-Daniel Hailfinger wrote:
> On 25.09.2009 01:55, Uwe Hermann wrote:
>> On Wed, Sep 23, 2009 at 08:39:01PM -0600, Marko Kraljevic wrote:
>>   
>>> I put my flashing machine back together, and installed two
>>> 3C905CX-TX-M cards[...]
>>> ( i'm unsure whether the >512kbit addr
>>> line(s) are drawn out to the flash or not ).
>>>     
>> The maximum supported chip size as per 3Com datasheets is 128KB.
>>   
> 
> Are there any GPIOs one could wire up as additional address lines with
> special handling code? With the current flashrom infrastructure, that
> would be almost trivial.
> 
> Regards,
> Carl-Daniel
> 

I don't believe there are. A while back, on a different NIC, I put a 
latch on the upper address lines; I'm quite sure I made a post about it, 
but maybe not. It was pretty ugly, but worked - planning to get a PCB 
made someday; should be able to just drop it in the socket on a 
unmodified card :-)

The top address line selects a latch, and then you can write the upper 
address bits to the latch...

schematic:
http://electrontube.org/3com_mod/minimal_sm.png

code change... could be beautified some:
http://electrontube.org/3com_mod/3comhack.diff

picture of the hardware:
http://electrontube.org/3com_mod/etherlink_mod.jpg


I was planning on using the leftover GPIO's off the latch to enable HV 
for 27xxx EPROMs. Someday...

-mark