95 SH DO O Serial communication signal to Sound Processor (Data signal output)
96 SH DI I Serial communication signal to Sound Processor (Data signal input)
97 SH CK I Serial communication signal to Sound Processor (Clock signal input)
98 E DET I Unusual condition detect signal input
99 CR TIMER I/O TIME CONSTANT terminal
100 SD I Station detector signal input from tuner circuit
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