See > 15-Pin mini-D Display Connector
See > 30-Pin P&D-D PnP - Display Connector
IBM Display Interface Cable Connections
See > 13W3 to 15-Pin mini-D - Detachable Monitor Cable Connectors (6544 - P70)
Signal Name
9-way
D-Shell 13W3
(Image
Adapter/I) 15-way
mini-D DDC
DDC2A/B
Video, RED
1
A1
1
1
1
Video, GREEN
2
A2
2
2
2
Video, BLUE
3
A3
3
3
3
Video, return RED
-
-
6
6
6
Video, return GREEN
-
-
7
7
7
Video, return BLUE
-
-
8
8
8
HORIZ SYNC
-
5
13
13
13
VERT SYNC
-
9
14
14
14
Sync return, Horiz
-
10
-
-
-
Sync return, Vert
-
4
-
-
-
Sync return, COMMON
-
-
10
10
10
SELF-TEST
-
3
5
5
5
ID-BIT 0
-
6
11
-
-
ID-BIT 1
-
7
12
-
-
ID-BIT 2
-
1
4
-
-
ID-BIT 3
-
2
15
-
-
DDC - SDA (data)
-
-
-
12
-
DDC - SCL (clock)
-
-
-
15
-
DDC2A/B POWER
-
-
*
-
9
KEY (no pin)
-
-
9
*
-
Monitor GROUND
-
-
-
-
-
System GROUND
-
-
-
-
-
Unused
-
-
-
-
-
Missing Pins
The key position pin-9, above, corresponds with an obstruction on many system
unit video ports, this is intended to reduce the likelihood of something other than a monitor being plugged
into the port and so offers limited protection to the electronics on the video adapter card.
DDC uses this pin for power and reassigns the ID bitsfor DDC signalling.
Older monitors do not use all the pin positions available.
The following were manufactured with pins intentionally missing:
Machine Type
Missing pins
Note
6312
9
6314
9 - 4,12,15
6319
9 - 12,15
6315, 21,22,24,25,27
9
6553, 6554, 6555
9
DDC supported
8503, 8504 (12M)
9 - 1,3,4,8,11,15
8506
9 - 1,3,4,8,11
8507
9 - 1,3,8,11,15
8508
9 - 1,3,4,8,11,12
8512, 8513
9 - 4,12,15
8514
9
all ID bits supported
8515, 8516, 9515
9 - 11,12,15
8518, 9518
9 - 4,12,15
9507
none
fully pinned
9521,22,24,25,27
9
Note that 6091I-19i and 9504 use the Image Plus 13W3 connector, which is self-keying
by virtue of its three coaxial connectors, it is always fully pinned.