IBM 2169 manual Serial Port Signals Pin Signal Name, Parallel Port Signals Pin Signal Name

System Board Connector Pin Signals

Monitor Port Signals

Pin	Signal Name	I/O	Pin	Signal Name	I/O
1	Red Video	O	9	+5 V dc	N/A
2	Green Video	O	10	Synch Ground	N/A
3	Blue Video	O	11	No Connection	N/A
4	No Connection	N/A	12	Monitor ID Bit 1	I
5	Synch Ground	N/A	13	Horizontal Synch	O
6	Red Ground	N/A	14	Vertical Synch	O
7	Green Ground	N/A	15	Monitor ID Bit 3	I
8	Blue Ground	N/A
Serial Port Signals
Pin	Signal Name	I/O	Pin	Signal Name	I/O
1	Data Carrier	I	6	Data Set Ready	I
	Detect
2	Receive Data	I	7	Request To Send	O
3	Transmit Data	O	8	Clear To Send	I
4	Data Terminal	O	9	Ring Indicator	I
	Ready
5	Signal Ground	N/A

Parallel Port Signals

Pin	Signal Name	I/O	Pin	Signal Name	I/O
1	Strobe	O	14	Auto Feed	N/A
2	Data Bit 0	I/O	15	Error	I
3	Data Bit 1	I/O	16	Initialize	O
4	Data Bit 2	I/O	17	Select (In)	O
5	Data Bit 3	I/O	18	Ground	Power
6	Data Bit 4	I/O	19	Ground	Power

136