Upgrading The System; Adding Main Memory - Intergraph TD-x20 System Reference Manual

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Upgrading the System

This chapter describes upgrading your TD-x20, TD-x25, TDZ-x20, or TDZ-x25 workstation
by adding more memory, internal or external SCSI devices, and option boards.
Attach an antistatic wrist strap as described in Chapter 1, "Opening and Closing the Base
Unit," before opening the base unit.

Adding Main Memory

Single inline memory modules (SIMMs) must meet the following specifications:
Height
Type
Specifications
NOTE System memory modules available from Intergraph have been certified for use with
Intergraph computers at extremes of temperature and system load to ensure reliable
performance. System memory modules available from other vendors may function
improperly or unreliably in your Intergraph computer.
To avoid damaging the SIMMs and voiding the warranty, take the following precautions .
u
Do not bend, twist, drop, or otherwise handle the SIMMs carelessly.
u
Do not expose the SIMMs to moisture or extreme temperatures.
u
Do not remove the SIMMs from the antistatic bag until instructed.
Follow these SIMM population rules to correctly install the SIMMs.
u
Each bank has two slots. Fill both slots in a bank.
u
Use the same size SIMM in both slots in a bank.
u
Install SIMMs one bank at a time, beginning with bank 0 and ending with bank 3.
u
After adding or replacing SIMMs, restart the computer. The new memory configuration
is detected automatically.
To install a memory upgrade:
1. Remove any option boards that interfere with access to the SIMM sockets.
2. Remove the existing SIMMs from their sockets before adding new ones. Refer to the
following figure.
Up to 1.4 inches high
72-pin, single- or double-sided EDO SIMMs
5 volt, 60 ns, 36 and 32 bit, tin-plated edge finger contacts
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