Connector Information - IBM RT Series Hardware Reference Manual

Connector Information
The signals that are on the pins vary with the driver card being
used and the mode in which it is operating. All signals are
expected to be TTL levels supplied by totem pole drivers.
Pin Mode 1 (16 Color)
Mode 2 (64 Color)
1 Shield Gnd Ground
2 Signal Gnd r
3 Red
R
4 Green G
5
Blue B
6 Intensity
a
7 Unused b
8 Horiz SYnc Horiz Sync
9 Vert Sync Vert SYnc
Note: The R G and B are the most significant bits. The r g
and b are the least significant bits.
6 IBM Enhanced Color
Display