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List: flashrom
Subject: Re: [flashrom] 3C905CX-TX-M not supported (But flashrom thinks it
From: Marko Kraljevic <krasnaya.zvezda () gmail ! com>
Date: 2009-09-25 7:56:37
Message-ID: 4ABC77B5.6060901 () gmail ! com
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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
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