IBM RT Series Hardware Reference Manual page 40

TNL SN20-9844 (March 1987) to 75X0235
Connector Specifications
Pin Function
1 Gnd - Vertical sync
2 Vertical sync
3 Fteserved
4 Fteserved
5 Gnd - Video
6 Video
7 Gnd - Video
8 Video
9 Gnd - Video
10
Video
11
Gnd - Video
12
Video
13 Gnd - Video
14
Video
15
Gnd - Horizontal sync
16
Horizontal sync
4 Extended Monochrome Graphics Display