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IBM PS/1 - Page 189

IBM PS/1
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Cache memory jumpers are preset at the factory for 128K cache memory.
Reset the jumpers for 256K by moving them forward to cover two jumper
pins, as shown in Figure 4-15.
Jumpers
Jumper
Pins
Bank 1
Tag
Bank 2
Notch
(Insert modules like this.)
(Move jumpers like this.)
Cache Memory Sockets
Memory
Module
Socket
Cache
Memory
Module
Figure 4-15. 486SX, 486DX, and 486DX2 (72-Pin Memory SIMM) System
Boards
Note: Not all system boards have cache memory sockets. Some have 1
bank while others have 2 banks of cache memory.
Repair Information 4-19

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