ROM revision 930809, acquired from HP 8561E S/N 3410A00611 option 005,
controller board part #08563-69065

EPROMs U306-U311 are probably compatible with the 8561E, 8562E, and 
8563E models, given their part number prefixes.  These images should 
be written to 27C020-12 EPROMs (120 ns or faster).

U501 is a 16-kbit byte-addressable EEPROM.  Original part type in the 
8561E was Xicor X2816CP-20.  This part was read successfully using settings 
for the Atmel AT28C16.  It appears to contain the unique model, serial, 
and option identifiers for this 8561E.  Provision is made on the motherboard 
for a larger EEPROM (U500), which is probably required for the 8563E.

-----------------
John Miles, KE5FX
jmiles@pop.net
7-May-08
