The mods I gave you previously are known to work on many different machines, including the 8711B, 8712B, 8714C etc.
The 8711B, 8712B and 8714B all use the same firmware.
I also asked about firmware version but you didn't tell me, if it is too old the extra features are likely not included.
Newest firmware is B.03.54 - be aware updating the firmware may require additional ram.
lastly be sure when you write to the 28F010 you erase before writing.