Specifications

CHAPTER 2
Hardware Design
30 Audio and Video I/O Support
Figure 2-9 I/O connections to Power Macintosh 7200
Loop-Back Video Support 2
The Power Macintosh 7500, 8500, and 9500 CPUs do not have a GIMO connector socket
to support the Berlin adapter card. The video interface with these CPUs is implemented
by means of a loop-back cable, as shown in Figure 2-10. This is a special Y-shaped cable
with three connectors. It connects the CPU’s DB15 connector to the PCI card’s DB26
connector, and it also provides a connector for a monitor.
IMPORTANT
The H-shaped loop-back cables used with DOS compatibility cards in
Power Macintosh 6100 computers are not compatible with the 12” and
7” cards. You should not try to use them with these cards. ▲
You can also configure systems like the Power Macintosh 9500 with a secondary video
card that allows you to connect a second Macintosh display if you wish.
If you are interfacing with a CPU that can accommodate a Berlin adapter and GIMO
connector, such as the Power Macintosh 7200, you can use the loop-back cable to connect
a second monitor, which may be used as a dedicated DOS/Windows screen.
Video connections for the Power Macintosh 9500 are made in a similar way, as shown in
Figure 2-11 on page 32.
Main circuit board
PCI connector
Berlin adapter card
Ribbon cable
16-pin GIMO connector (on CPU board)
PCI card, full sized or half sized
Audio-in
cable
CD-ROM drive or
other sound source
Audio-out cable
DB15 connector
(on CPU board)
shared video-out for
PC and Macintosh