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* U503 V1.6 160-6992-06 | * U503 V1.6 160-6992-06 | ||
* U607 V1.1 160-6991-01 | * U607 V1.1 160-6991-01 | ||
ROM image files for all three ROMs can be found on the [[ROM images]] page. | |||
There are two smaller decoder chips in 20-pin DIP (300mil) packages, likely to be 16V8 GAL/PAL: | There are two smaller decoder chips in 20-pin DIP (300mil) packages, likely to be 16V8 GAL/PAL: |