IBM 2274 manual System Board Connector Pin Signals, Monitor Port Signals, Serial Port Signals

System Board Connector Pin Signals

Monitor Port Signals

Pin	Signal	I/O	Pin	Signal	I/O
	Name			Name
1	Red Video	O	9	+5 V dc
2	Green Video	O	10	Synch
				Ground
3	Blue Video	O	11	Monitor ID Bit
				0
4	Monitor ID Bit	I	12	SDA	I
	2
5	Synch		13	Horizontal	O
	Ground			Synch
6	Red Ground		14	Vertical	O
				Synch
7	Green		15	SCL	I
	Ground
8	Blue Ground
Serial Port Signals

Pin	Signal	I/O	Pin	Signal	I/O
	Name			Name
1	Data Carrier	I	6	Data Set	I
	Detect			Ready
2	Receive	I	7	Request T	O
	Data			Send
3	Transmit	O	8	Clear T	I
	Data			Send
4	Data	O	9	Ring	I
	Terminal			Indicator
	Ready
5	Signal
	Ground

Parts/Test Point Locations 127