Apple PC Compatibility Card

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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

 

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