System 80 test EPROM LED flash codes

One long flash: the test code runs, so the 6502, U3 select logic, reset and clock work. One short flash: 5101 RAM passed. Two flashes: RIOT U4 memory passed. Three: U5 passed. Four: U6 passed. With test EPROM 2 fitted: five flashes means the game PROM socket passed, and a long flash followed by one, two or three short flashes means the timers of U4, U5 or U6 passed. The test stops at the first failure, then runs the RIOT I/O tests.

Systems

• Gottlieb System 80
• Gottlieb System 80A
• Gottlieb System 80B

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Source: Gottlieb System 80 Test EPROM V3.2 (February 2015), Pinitech