Specifications

3-3
Installing System Memory and Add-On Peripherals
System Memory
System memory devices, commonly known as SIMMs (Single Inline Memory
Modules), are necessary to operate the M54Hi-Plus system board. The
M54Hi-Plus has four SIMM sockets and may be upgraded to 128 Megabytes
of RAM. This section will explain the type of SIMMs supported, list the
rules of adding memory to the M54Hi-Plus, give some examples of common
memory configurations, and show how to physically install the new SIMMs.
SIMMs Supported
The M54Hi-Plus supports the following 72 pin, 60ns or 70ns SIMMs:
4MB (1Mx36)
8MB (2Mx36)
16MB (4Mx36)
32MB (8Mx36)
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.
To add 16MB of memory to the system board, install two 8MB
SIMMs into the same bank.
When installing SIMMs, fill bank 0, then bank 1.