IBM PS/1 User Manual

System Board Connector Assignments
Display/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 Synch Ground
6 Red Ground
7 Green Ground
8 Blue Ground
9 No Connection
10 Synch Ground
11 Monitor ID Bit 0 I
12 Monitor ID Bit 1 I
13 Horizontal Synch O
14 Vertical Synch O
15 Monitor ID Bit 3 I
5-20

IBM PS/1 Specifications

General

Brand	IBM
Model	PS/1
Category	Desktop
Language	English