Specifications

CHAPTER 3
I/O Specifications
PCI Connector 35
Figure 3-2 Locations of I/O connectors for the 7” card
PCI Connector 3
The PCI local bus is a bus architecture that allows you to connect cards such as the 12”
and 7” cards to the computer’s main circuit board. Figure 3-3 shows in functional groups
the PCI bus signals used on the cards. The PCI signals not used in the 12” and 7” cards
and ground and power signals are not shown in Figure 3-3. Table 3-1 on page 36 lists
some of the bus specifications.
Table 3-2 on page 38 lists and describes the PCI bus signals used on the 12” and 7” cards.
For further information about the PCI bus, refer to Designing PCI Cards and Drivers for
Power Macintosh Computers, published by Apple Computer, and PCI Local Bus
Specification, published by Intel Corporation.
168-pin DIMM connector
GIMO
connector
XD connector
Ribbon cable
Berlin
adapter card
This edge
plugs into the
Macintosh CPU
main circuit board
PCI edge connector
Sound out
CD
sound in
Video
connector
(DB26)
Mounting bracket
for DB connectors
Game I/O
(DB15)