P5000HX Service and Support
48
Model P5000HX Series CPU User’s Manual
3.1
Installing Memory
Overview
The P5000HX supports up to 256 MBytes of on-board
memory. Memory can be added through the installation of
SIMM’s (Single Inline Memory Modules).
Memory Banks
The P5000HX provides four 72-pin SIMM sites for
memory expansion equivalent to two (2) memory banks,
with each bank consisting of two sockets and providing a
64-bit wide data path and 8 parity bits. Memory size is
detected by the system BIOS. Memory timing requires 70
ns fast page devices. Parity generation/checking is pro-
vided for each byte.
SIMM Types
Five SIMM types (1, 2, 4, 8, and 16MByte) are supported.
These x36 SIMM’s can be installed in SIMM sockets 1, 2,
3, or 4 as shown in Figure 19:
•
Sockets 1 and 2 comprise Bank 0.
•
Sockets 3 and 4 comprise Bank 1.
Banks must be completely filled to be operable (i.e. if a 1
MByte SIMM is installed in Socket 1, another 1 MByte
SIMM must be installed in Socket 2, etc.). The table on the
following page summarizes the supported configurations.
Note: The P5000HX board’s gold sockets require gold
SIMM’s. The warranty may be voided if tin/lead SIMM’s
are used.
CAUTION: Before installing SIMM’s, remove power from
the system and disconnect all power cords. After power has
been removed, remove the P5000HX from the chassis. Only
qualified, experienced electronics personnel should access
the interior of a chassis. Wear the grounding wrist strap
provided with your P5000HX to help remove static electric-
ity. While out of the unit, P5000HX components should be
placed on a static-dissipative surface.
