The Cpu Module And The Base System Module - DEC Personal DECstation 5000 User Manual

CPU Modules
Figure 11–1 The CPU Module and the Base System Module
WSMXS030
.
To tell what kind of CPU module you have, look at the part number on it while
referring to Table 11–1.
Table 11–1 CPU Modules
CPU type
20-megahertz
25-megahertz
33-megahertz
1
These are the newer plastic (as opposed to ceramic) parts; they are functionally equivalent to the
earlier variety listed.
The CPU modules are similar in appearance. Look on the module for the
adhesive label displaying the part number suffix (01 or 02) for help in
identifying modules.
To upgrade your system–that is, to replace a 20- or 25-megahertz CPU module
with either a 25- or 33-megahertz CPU module–follow the steps in this chapter.
11–2 CPU Modules
CPU module
Base system module
FRU number Customer order number
54-20615-01 KN02-BC
1
54-21337-01
54-20615-02 KN02-CC
1
54-21337-02
54-21331-01 KN02-DA