Octel XC1000, Service Manual, Page: 105 / 889

PLATFORM INSTALLATION
3-41 Edition One XC1000 Service
S1
Figure 3-25. C10 CPU Memory-Configuration
Switch Settings for 8 MB.
The C10 CPU can be upgraded to 16 MB of memory by replacing the eight
1-MB single in-line memory modules (SIMMs) with four higher capacity
4-MB SIMMs. (Refer to installation instruction 181–1094–000,
Memory
Upgrade on the C10 CPU .) After upgrading to the C10 CPU, relabel the
CPU with P/N 044-2004-002, revision C.
If the memory upgrade to 16 MB is performed, verify that the C10 CPU has
the correct revision of EPROMs installed. Verify the EPROM revision levels
by checking
Service Note 94–201 , Changing EPROMs With Software Upgrades.
Before installing a C10 CPU that has been upgraded to 16 MB, verify that
the dip switches are set properly for 16 MB, as shown in Figure 3-26.
S1
Figure 3-26. C10 CPU Memory-Configuration
Switch Settings for 16 MB.
The C20 CPU, P/N 244–2053–011, replaces the C20 CPU,
P/N 244–2053–010. It is an enhanced version of the C10 CPU,
P/N 244–2004–001, (8 MB) or the C10 CPU, P/N 244–2004–002, revision C
(16 MB). The C20 CPU is shipped with 16 MB of memory, and it does not
have to be replaced when a nonredundant XC1000 is upgraded to a
standby-redundant configuration.
The C20 CPU must have the S2 memory-configuration switches, located
near the LEDs, set as shown in Figure 3-27. The S1 dip switches must all
be set to OFF.
S2
Figure 3-27. C20 CPU Memory-Configuration
Switch Settings on S2.
SECTION 3.11