IBM 6646 System Board Connector Pin Signals, Monitor Port Signals, IDE Cable Connector 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
IDE Cable Connector Signals

Pin	Signal	I/O	Pin	Signal	I/O
	Name			Name
1	Host Reset	O	21	No
				Connection
2	Ground		22	Ground
3	Host Data 7	I/O	23	Host IOW	O
4	Host Data 8	I/O	24	Ground	Power
5	Host Data 6	I/O	25	Host IOR	O
6	Host Data 9	I/O	26	Ground	Power
7	Host Data 5	I/O	27	I/O Channel	I
				Ready
8	Host Data	I/O	28	No
	10			Connection
9	Host Data 4	I/O	29	No
				Connection
10	Host Data	I/O	30	Ground	Power
	11
11	Host Data 3	I/O	31	Host IRQ	I
12	Host Data	I/O	32	No
	12			Connection

Parts/Test Point Locations 117