Developer Documentation
PATHHardware Documentation > PowerBook G3 Series 1999

Address Multiplexing

Signals A[0] - A[13] on each RAM SO-DIMM make up a 14-bit multiplexed address bus that can support several different types of SDRAM devices. Table 4-7 lists the types of devices that can be used in this computer by size, configuration, and sizes of row and column addresses.

Table 4-7 Types of DRAM devices 

Device size

Device
configuration

Size of
row address

Size of
column
address

16 Mbits 2M x 4 x 2 11 10
16 Mbits 1M x 8 x 2 11 9
16 Mbits 512K x 16 x 2 11 8
64 Mbits 8M x 4 x 2 13 10
64 Mbits 4M x 4 x 4 12 10
64 Mbits 4M x 8 x 2 13 9
64 Mbits 2M x 8 x 4 12 9
64 Mbits 2M x 16 x 2 13 8
64 Mbits 1M x 16 x 4 12 8
64 Mbits 1M x 32 x 2 13 7
64 Mbits 512K x 32 x 4 12 7
128 Mbits 4M x 8 x 4 13 9
128 Mbits 2M x 16 x 4 13 8

IMPORTANT

The PowerBook G3 Series computer supports only the types of SDRAM devices specified in Table 4-7 . Other types of DRAM devices should not be used with this computer.


© 1999 Apple Computer, Inc. – (Last Updated 29 April 99)