M6Mi System Board Manual
Section 3: Installing the M6Mi
19
System Memory
System memory devices, commonly known as SIMMs,
are necessary to operate the M6Mi system board. The
M6Mi has six 32/36-bit SIMM sockets and can be up-
graded to 384 Megabytes of RAM. In addition, support is
provided for Error Checking (ECC), Extended Data Out
(EDO) DRAM memory and Fast Page Mode (FPM)
DRAM memory. This section will explain the type of
SIMMs supported, list the rules for adding memory to the
M6Mi, give some examples of common memory configu-
rations and show how to physically install the new SIMMs.
SIMMs Supported
The M6Mi supports the following types of 60 or 70ns
SIMMs:
4MB (1MBx32/36)
8MB (2MBx32/36)
16MB (4MBx32/36)
32MB (8MBx32/36)
64MB (16MBx32/36)
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, fill Bank 0, then Bank 1,
then Bank 2.
For long
term
reliability,
Micronics
recom-
mends using
SIMMs with
tin-plated
contacts.
The use of
gold-plated
contacts
may conflict
with the tin-
alloy on the
SIMM
socket.
