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Section 3: Installing the M54E2
M54E2 System Board Manual
3-3
System Memory
System memory devices, commonly known as SIMMs (Single Inline Memory
Modules), are necessary to operate the M54E2 system board. The M54E2 has
eight SIMM sockets and can be upgraded to 512 Megabytes of RAM. This
section will explain the type of SIMMs supported, list the rules of adding
memory to the M54E2, give some examples of common memory configura-
tions, and show how to physically install the new SIMMs.
SIMMs Supported
The M54E2 supports 72-pin, 60 or 70ns SIMMs in the following configura-
tions:
4MB (1MBx32/36)
8MB (2MBx32/36)
16MB (4MBx32/36)
32MB (8MBx32/36)
64MB (16MBx32/36)
NOTE: For long term reliability, Micronics recommends using SIMMs with
tin-plated contacts. The use of gold-plated contacts may conflict with the tin-
alloy on the SIMM socket.
Upgrading Rules
The following is a list of rules to follow when upgrading SIMMs. If you
follow these rules, your upgrade should be trouble-free:
Use 70ns or faster SIMMs.
Upgrade SIMMs one bank at a time. Each bank must contain two
SIMMs of the same size and preferably from the same manufacturer.
For example, to add 16MB of memory to the system board, install
two 8MB SIMMs into the same bank.
When installing SIMMs, start with Bank 0 and work your way up
(0,1,2,3).