Board MM4 is used in the SIMADYN D system as general RAM memory board on the local- and communications bus for 32-bit processor boards. The 32-bit processors ( PMxx, PTxx ) can communicate with one another via the MM4 board, whereby the MM4 is inserted directly to the right of the master processor.
There are three known variants:
- Edition 1 Memory module MM4 - 04.93
- Edition 2 Memory module MM4 - 09.94
- Edition 3 Memory module MM4 - 05.95