IBM PS/1 User Manual

2055—Cache Memory
Warning: Memory cards are sensitive to static discharge. See “Handling
ESD-Sensitive Parts” on page 4-47.
Cover (2005)
Adapter Card(s) (2035) if applicable
Riser Card (2045) if applicable.
Note: Run the Configuration Utility after adding or removing cache memory.
If the system board has cache memory modules already installed, the com-
puter has 128K of cache memory. Upgrade to 256K by adding memory
modules as follows:
Bank 2 Add four 28-pin modules: 32K × 8, 25 ns SRAM.
Tag Replace existing module with one 28-pin module: 32K × 8,
20 ns SRAM.
If you are installing cache memory in a board with no cache memory previ-
ously installed, install 128K or 256K as follows:
Bank 1 Add four 28-pin modules: 32K × 8, 25 ns SRAM (for 128K or
256K).
Bank 2 Add four 28-pin modules: 32K × 8, 25 ns SRAM (for 256K).
Tag Add one 28-pin module: 32K × 8, 20 ns SRAM (for 256K)
or
8K × 8, 20 ns SRAM (for 128K).
Repair Information 4-39

IBM PS/1 Specifications

General

Processor	Intel 80286 or 80386
Processor Speed	10 MHz (80286)
RAM	1 MB (expandable to 2 MB or more)
Storage	40 MB hard drive
Floppy Drive	3.5" 1.44 MB
Graphics	VGA
Ports	Serial, Parallel, Mouse