I found a solution that works.
I changed the AM29F010A/B entry inside flashchips.c
Under ".feature_bits" I removed FEATURE_ADDR_2AA leaving only FEATURE_EITHER_RESET,
After recompiling, flashrom now detects my Am29F010 and it also successfully reads and writes!
I'm not a programmer so I can't explain why this works but it does.
 
Sent: Wednesday, July 29, 2015 at 6:22 PM
From: "Idwer Vollering" <vidwer@gmail.com>
To: flashrom <flashrom@flashrom.org>
Subject: Re: [flashrom] Not detecting Am29F010 using 3Com PCI nic
2015-07-29 20:38 GMT+02:00 Ignatius Grippa <ignatiusgrippa@gmx.com>:
> Hello,
>
> First time posting.
>
> I cannot get my Am29F010 EEPROM recognized by flashrom v0.9.8-r1889

That chip *should* be detected:
http://www.flashrom.org/Supported_hardware#Supported_flash_chips

>
> I'm using a 3Com PCI ethernet card (3C90xB) that recognizes the EEPROM
> using a different program "bromutil"

So what does [b|c|oc]romutil [1] do what the code in flashrom's
nic3com.c doesn't do?

http://git.etherboot.org/gpxe.git/tree/90bffed805ec453d2f75e61157b73eb2bb6b1fe1:/contrib/3c90xutil

> I've also tested my 3Com using a different chip AT29C010 which is recognized
> & reads/writes with flashrom so I think it must be a software issue with the
> AMD.
>
> I can get flashrom to read the AMD to a file if I do a force -f -c
> Am29F010A/B but no write because it's not recognized.

Forcing shouldn't be necessary...

> I've attached my log. Seems flashrom is not reading the id codes correctly
> for the AMD. Instead it reads the first 2 bytes of info stored on the chip
> (4c ef in the log) However, probing for Atmel and many others retrieves the
> correct manufacturer/model id codes for the AM29F010 which is 01 20
>
> Any clue what might be happening? Thanks very much.
>
> Dave
>
>
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> flashrom@flashrom.org
> http://www.flashrom.org/mailman/listinfo/flashrom

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