1–8
Preparing for the Installation
Table 1–4 shows valid DIMM combinations.
1.4.5 Primary Breakout Module
The primary breakout module is a required module that plugs into your VMEbus
backplane behind the slots occupied by your Alpha VME 5/352 or 5/480 SBC
CPU and I/O modules. This breakout module supplies additional power to the
CPU module by way of the VMEbus P2 connector and provides:
•
A connector for attaching a SCSI bus
•
Additional P2 options, such as the secondary breakout module
•
SCSI termination control
•
A connection for and control of a watchdog timeout signal
•
A connector to Alpha VME external timing signals
Figure 1–5 shows the primary breakout module.
Table 1–4 Valid DIMM Combinations
Memory Size
(MB)
DIMM 0
(MB)
DIMM 1
(MB)
DIMM 2
(MB)
DIMM 3
(MB)
16
8
8
32
8
8
8
8
32
16
16
64
16
16
16
16
64
32
32
128
32
32
32
32
128
64
64
256
64
64
64
64
256
128
128
512
128
128
128
128
