Simm Upgrade; Checking The Memory In The System - NEC POWERMATE PROFESSIONAL - SERVICE MANUAL 05-1997 Service Manual

SIMM Upgrade

SIMM sticks are installed into SIMM sockets on the system board. The system board
provides four SIMM sockets and supports up to 256 MB of high-speed memory using
industry-standard, tin-plated, single in-line memory modules (SIMMs). The system supports
the following SIMMs:
T
1-MB by 32- or 36-bit (4-MB stick)
T
2-MB by 32-or 36-bit (8-MB stick)
T
4-MB by 32- or 36-bit (16-MB stick)
T
8-MB by 32-or 36-bit (32-MB stick)
T
16-MB by 32- or 36-bit (64-MB stick).
36-bit SIMMs may be used, but parity generation and checking is not supported.
To determine the memory needed for the memory upgrade, see Table 3-1. See "SIMM
Installation" in this section when installing the SIMMs.

Checking the Memory in the System

Use the following procedure to:
T
check the memory installed in the system
T
determine the SIMM configuration you need to increase the memory
T
identify the correct sockets for SIMM installation.
NOTE: The system ships with EDO SIMMs.
SIMM sockets must contain the same size
SIMMs.
SIMM memory must be installed in pairs of the
same memory type.
The factory-installed SIMMs are installed in
bank 1 (sockets 3 and 4). Bank 0 (sockets 1 and
2) is empty.
CAUTION: To avoid corrosion between
different metals, only use tin-plated SIMM sticks.
Option Installation 3-11