The slam input has priority over every other switch
The slam switch is wired to its own edge-triggered interrupt pin (PA7) on RIOT U5 rather than through the switch matrix, so the CPU sees it ahead of any other input.
Systems
Related tips
- How the switch matrix is scanned
- One or more playfield switches do nothing
- Where to see the switch matrix strobes
- Switch test (step 18) shows switches closed
- A coin chute switch does not register or registers wrongly
- A playfield switch triggers the wrong response
- The play-test button will not start the test sequence
- How the 32 option switches are read
Source: System 80 Service Manual, Gottlieb