From http://www.pdp12.org/pdp-common/reference/papertapes/maindec-08.html

MAINDEC-08-DHKMA-A-PB 	PDP-8/E extended memory data and checkerboard test. Replaces: MAINDEC-8E-D1BC
MAINDEC-08-DHKMA-C-PB 	8E/F/M PDP8E/M/F EXTENDED MEMORY CHECKERBOARD
MAINDEC-08-DHKMA-D-PB 	EXTENDED MEMORY CHECKERBOARD
MAINDEC-08-DHKMC-B-PB 	8E/M/F EXTENDED MEMORY ADDRESS TEST
MAINDEC-08-DHKMC-C-PB 	EXTENDED MEMORY ADDRESS TEST

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