MDA (Hercules) connector
pinout
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9 pin D-SUB FEMALE connector at the videocard
Pin
Name
Description
1
GND
Ground
2
GND
Ground
3
n/c
4
n/c
5
n/c
6
I
Intensity
7
M
Mono Video
8
H
Horizontal Sync
9
V
Vertical Sync
9 pin D-SUB MALE connector at the monitor cable