Test connector TC1 pins for the address and data bus
TC1 carries the CPU bus for checking in attract mode. Address lines AB0 to AB4 are on pins 36 to 40, AB5 to AB11 on pins 31 down to 25, and AB12 to AB15 on pins 32 to 35. Data lines DB0 to DB2 are on pins 3 to 5, DB3 to DB5 on pins 10, 9 and 8, DB6 on pin 2 and DB7 on pin 1. Pin 16 is the interrupt request, pin 12 is SYNC and pin 15 the system clock.
Systems
Related tips
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Source: System 80 Service Manual, Gottlieb