DEC RX50 Test Disks

[Christian R. Fandt]

I have a set of five RX50 floppies which contain various service tests. I 
have not yet discovered what machine/CPU these work upon. Could anybody 
point me in the direction of how to interpret the seven-character part 
numbers?  All have a copyright date of 1983. They are as follows:

CZUFDB1 (disk part # BL-T540B-M1 "USER TESTS")
CZXD1B1  (disk part # BL-T541B-M1 "FIELD SERVICE TESTS 1")
CZXD2B0  (disk part # BL-T542B-MC "FIELD SERVICE TESTS 2")
CZXD3B0  (disk part # BL-T565B-MC "FIELD SERVICE TESTS 3")
CZXD4B0  (disk part # BL-T583B-MC "FIELD SERVICE TESTS 4")

Are these some version of XXDP? They came with the MVII and MicroPDP-11/73 
systems that I got as part of The Great Haul back in July 1998, but there 
is no indication who they go to.

I stumbled across something about deciphering those CZX-type numbers a 
while back but did not retain the URL (naturally, now that I need to use it).

Thanks much.

-Chris F.

NNNN


Christian R. Fandt, Treasurer
Antique Wireless Association, Inc.
Jamestown, New York   USA
                          email:  cfandt at netsync.net
                          Electronic/Electrical Historian
                          URL: http://www.antiquewireless.org/