NEC PowerMate VP75, Руководство пользователя

Страница: 87 / 210

3-14 Options
SIMM Memory Installation
The system board comes standard with 8 MB of 32-bit (non-parity) memory for non-multimedia
configurations and 16 MB of 32-bit memory for multimedia configurations. Memory can be ex-
panded up to 128 MB. The system board also supports 36-bit (parity) SIMMs. SIMM kits are
70-ns SIMMs.
NOTE:
The metal plating on the SIMM stick con-
nectors must match the metal plating in the SIMM
sockets in the computer. Use tin-plated SIMM
sticks with tin-plated SIMM sockets.
Memory expansion option kits include the following:
n
4-MB SIMM kit (1 MB x 32-bit SIMM stick).
n
8-MB SIMM kit (2 MB x 32-bit SIMM stick).
n
16-MB SIMM kit (4 MB x 32-bit SIMM stick).
n
32-MB SIMM kit (8 MB x 32-bit SIMM stick).
n
64-MB SIMM kit (16 MB x 32-bit SIMM stick).
NOTE: The 32-bit SIMM kits are used in the
U.S. and Canada only. The 36-bit SIMMs are used
elsewhere.
SIMM Upgrade Path
The SIMMs come in two different types, single-sided or double-sided. In the 8-MB non-
multimedia configurations, two 4-MB single-sided SIMMs are installed in SIMM sockets 1 and 2
(bank 0). In the 16-MB multimedia configurations, two 8-MB double-sided SIMMs are installed
in SIMM sockets 1 and 2. Figure Section 3-12 shows the location of the sockets and banks.
Table Section 3-3 and Table Section 3-4 provide valid SIMM configurations.
Setting the system for use with single-sided or double-sided SIMMs is done by jumper JP1 on
the system board, next to the SIMM sockets. For systems with the 8-MB configuration, pins 2
and 3 on JP1 are shorted. Also, pins 2 and 3 must be shorted if installing the following SIMMs in
sockets 1 and 2 (bank 0):
n
1 MB SIMMs
n
4 MB SIMMs
n
16 MB SIMMs