This page describes the video loopback cable that comes with the
PC Compatibility cards, and provides pinouts for the cable and the
card. The Apple PC Compatibility cards come bundled with a
three-headed video loop-back cable. The cable allows the routing of
both the PC video signal and the Macintosh video signal to a single
monitor. Listed below are the pinouts for the 26-pin video
connector and the 15-pin connector on the card, and the pinouts for
the three-headed video loop-back cable:
Video Connector
| Pin |
Signal |
Description |
| 1 |
MAC HSYNC |
Macintosh horizontal sync. |
| 2,4,6,8 |
GND |
Logic ground |
| 3 |
MAC BLUE |
Macintosh blue signal |
| 5 |
SENSE0 |
Sense line 0 |
| 7 |
BLUE OUT |
Blue output from PCI card |
| 9 |
HSYNC OUT |
Horiz. sync. output from PCI card |
| 10 |
MAC CSYNC |
Macintosh contrast sync. |
| 11,13,15,17,21,24 |
GND |
Chassis ground |
| 12 |
MAC GREEN |
Macintosh green signal |
| 14 |
SENSE1 |
Sense line 1 |
| 16 |
GREEN OUT |
Green output from PCI card |
| 18 |
CSYNC OUT |
Contrast sync. out from PCI card |
| 19 |
MAC VSYNC |
Macintosh vertical sync. |
| 20 |
MAC RED |
Macintosh red signal |
| 22 |
CABLE DET L |
Cable detect low |
| 23 |
SENSE2 |
Sense line 2 |
| 25 |
RED OUT |
Red output from PCI card |
| 26 |
VSYNC OUT |
Vertical sync. out from PCI card |
Joystick Port
| Pin |
Signal |
| 1,8,9 |
VCC I/O |
| 2 |
JOYF 0 |
| 3 |
JRC 0 |
| 4,5 |
GROUND |
| 6 |
JRC 1 |
| 7 |
JOYF 1 |
| 10 |
JOYF 2 |
| 11 |
JRC 2 |
| 12 |
MIDI OUT |
| 13 |
JRC 3 |
| 14 |
JOYF 3 |
| 15 |
MIDI IN |
Frame Ground (threaded screw holders used to attach cable)
Video “Y” Cable Pinouts, 26-pin End to PC Compatibility Card
| Pin |
Signal |
| 1 |
MAC HSYNC |
| 2 |
HSYNC RETURN |
| 3 |
MAC BLUE |
| 4 |
MAC BLUE RETURN |
| 5 |
SENSE 0 |
| 6 |
BLUE OUT RETURN |
| 7 |
BLUE OUT |
| 8 |
HSYNC OUT RETURN |
| 9 |
HSYNC OUT |
| 10 |
MAC CSYNC |
| 11 |
CSYNC RETURN |
| 12 |
MAC GREEN |
| 13 |
GREEN RETURN |
| 14 |
SENSE 1 |
| 15 |
GREEN OUT RETURN |
| 16 |
GREEN OUT |
| 17 |
CSYNC OUT RETURN |
| 18 |
CSYNC OUT |
| 19 |
MAC VSYNC |
| 20 |
MAC RED |
| 21 |
RED RETURN |
| 22 |
CABLE DET |
| 23 |
SENSE 2 |
| 24 |
RED OUT RETURN |
| 25 |
RED OUT |
| 26 |
VSYNC OUT |
Video “Y”
Cable Pinouts, 15-pin End to MAC Video
| Pin |
Signal |
| 1 |
RED RETURN |
| 2 |
MAC RED |
| 3 |
MAC CSYNC |
| 4 |
SENSE 0 |
| 5 |
MAC GREEN |
| 6 |
GREEN RETURN |
| 7 |
SENSE 1 |
| 9 |
MAC BLUE |
| 10 |
SENSE 2 |
| 11 |
MAC SYNC RETURN |
| 12 |
MAC VSYNC |
| 13 |
MAC BLUE RETURN |
| 14 |
CABLE DETECT |
| 15 |
MAC HSYNC |
Video “Y”
Cable Pinouts, 15-pin End to Monitor
| Pin |
Signal |
| 1 |
RED OUT RETURN |
| 2 |
RED OUT |
| 3 |
CSYNC OUT |
| 4 |
SENSE 0 |
| 5 |
GREEN OUT |
| 6 |
GREEN OUT RETURN |
| 7 |
SENSE 1 |
| 9 |
BLUE OUT |
| 10 |
SENSE 2 |
| 11 |
CSYNC OUT RETURN |
| 12 |
VSYNC OUT |
| 13 |
BLUE OUT RETURN |
| 14 |
HSYNC OUT RETURN |
| 15 |
HSYNC OUT |
References
Category:Miscellaneous
Connectors
