OK, if I do the equivalent of: setpci -s 0:1f.0 4e.b=1
Then writes are enabled. Note you can't really do this due to a bug in the pcitools == have to do it by program.
Then, if I run flash_rom, jedec_probe will get an ID of the 82802AB of
vendor 89, device code AD (4 mbit part)
So flash_rom I think might be able to flash this part!
I have added an entry into flash_rom and will test this tomorrow.
ron