Model 100 Serial Interface

I/O Map

Direction indicates both data flow, and whether to use an IN or OUT instruction to read/write to the given pin.

Name	Direction	Port
TX	Output	$C8
RX	Input	$C8
RTS	Output	$BA, bit 7
CTS	Input	$BB, bit 4
DSR	Input	$BB, bit 5
DTR	Output	$BA, bit 6