IBM 2140, 2142 manual System Board Connector Specifications, Monitor/Signal, Parallel Port

System Board Connector Specifications

Refer to “System Board Layout—Type A-1” on page 5-2 and “System Board Layout—Type A-2” on page 5-5 for connector identification and location information.

Monitor/Signal

Pin	Signal Name		I/O
1	Red	Video	O
2	Green	Video	O
3	Blue	Video	O
4	Monitor ID Bit 2		I
5	Sync	Ground
6	Red	Ground
7	Green	Ground

Pin	Signal Name			I/O
8	Blue	Ground
9	+5 V	dc
10	Sync	Ground
11	Monitor ID		Bit 0	I
12	SDA			I
13	Horizontal		Sync	O
14	Vertical Sync			O
15	SCL			I

Parallel Port

Pin	Signal Name			I/O
1	Strobe			O
2	Data	Bit	0	I/O
3	Data	Bit	1	I/O
4	Data	Bit	2	I/O
5	Data	Bit	3	I/O
6	Data	Bit	4	I/O
7	Data	Bit	5	I/O
8	Data	Bit	6	I/O
9	Data	Bit	7	I/O
10	Acknowledge			I
11	Busy			I
12	Paper	Empty		I
13	Select			O

Pin	Signal	Name	I/O
14	Auto	Feed	N/A
15	Error		I
16	Initialize		O
17	Select (In)		O
18	Ground		Power
19	Ground		Power
20	Ground		Power
21	Ground		Power
22	Ground		Power
23	Ground		Power
24	Ground		Power
25	Ground		Power

Parts/Test Point Locations5-17