Pin Signal
1 Red
2 Green
3 Blue
4 No Connect
5 Ground
6 Ground
7 Ground
8 Ground
9 No Connect
10 Ground
11 No Connect
12 DDC DAT
13 HSync
14 VSync
15 DDC Clock

see also → video mixer

VGA / SVGA / XGA monitor / video connector MAC II / QUADRA monitor video connector
1 red 1 red ground
2 green 2 red
3 blue 3 C sync
4 ID bit 4 sense pin
5 n/c 5 green
6 red ground 6 green ground
7 green ground 7 sense pin
8 blue ground 8 n/c
9 n/c 9 blue
10 sync ground 10 sense pin
11 ID bit 11 ground
12 ID bit 12 V sync
13 horizontal sync 13 blue ground
14 vertical sync 14 ground
15 n/c 15 H sync

VGA 9pin D-Sub Connector
1 RED Red Video
2 GREEN Green Video
3 BLUE Blue Video
4 HSYNC Horizontal Sync
5 VSYNC Vertical Sync
6 RGND Red Ground
7 GGND Green Ground
8 BGND Blue Ground
9 SGND Sync Ground

9pin to 15pin D-Sub VGA Adapter
Description 9pin 15pin
Red Video 1 1
Green Video 2 2
Blue Video 3 3
Horizontal Sync 4 13
Vertical Sync 5 14
Red GND 6 6
Green GND 7 7
Blue GND 8 8
Sync GND 9 10 + 11

Macintosh to VGA Video Adapter
DESCRIPTION Mac VGA
Red Ground 1 6
Red 2 1
Composite sync 3 13
Monitor Sense 0 4 4
Green 5 2
Green Ground 6 7
Monitor Sense 1 7 11
No connection 8 n/c
Blue 9 3
Monitor sense 2 10 12
Sync Ground 11 10
Vertical Sync 12 14
Blue Ground 13 8
Horizontal Sync Ground 14 n/c
Horizontal Sync 15 n/c

NuVista+ 9pin D-Sub Connectors
pin input output
1 Ground Ground
2 Ground Ground
3 Red Input Red Output
4 Green Input Green Output
5 Blue Input Blue Output
6 Composite Video Input Composite Video Output
7 Composite Sync Input Composite Sync Output
8 Luma Input (S-Video) Luma Output (S-Video)
9 Chroma Input (S-Video) Chroma Output (S-Video)

(note the NuVista cards can be used with MacIvory II or III boards)