12RM63
The 12RM63 is a software ROM pack for the 1240 and 1241. It is used to disassemble instructions from the MOS Technology 6502 microprocessor.
The UPIK 40 harness is used to make an easy connection to the processor. It is not required though. You need at least two 1240D2 cards installed with 4 probes.
Manuals
ROM images
Pictures
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Disassembly screen