[Premium-Rx] WJ 8711A CONTROL A2 BOARD INFO REQUESTED

[Pat1McA at aol.com]

Greetings to all,
 
Is anyone familiar with the WJ 8711A Digital Control Board A2 Assembly type 
 904978-3 ?
 
Specifically, what Firmware versions pertain to this particular  Control 
Board?
 
Can it run on the same EPROMS as the earlier Type 797214 A2  Board? 
 
ie. A2 U56 04.02.07 and A2 U12 04.01.10  or does it require a  completely 
different set of Firmware ?
 
Is there any advantage in using the 904978 Control Board ?
 
Thanks in advance. Please reply offline.
 
Regards de Pat G3YFK