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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 4-26.
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
4-26. 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.
4-40
Summary of Contents for PS/1
Page 1: ...M achine Types 2133 2155 and 2168...
Page 2: ......
Page 3: ...M achine Types 2133 2155 and 2168...
Page 8: ...Index X 1 vi...
Page 14: ...xii...
Page 38: ...1 24...
Page 40: ...Notes 2 2...
Page 67: ...Notes Diagnostic Information 2 29...
Page 95: ...Notes Diagnostic Information 2 57...
Page 112: ...MAP 1100 continued 003 continued Replace the system board 2 74...
Page 116: ...MAP 1200 continued 009 Replace the serial port adapter card 2 78...
Page 134: ...Notes 2 96...
Page 170: ...3 12...
Page 175: ...1005 Cover Cover release Latch Repair Information 4 5...
Page 185: ...1045 Riser Card Adapter Card 1035 Left DASD Support Bracket 1010 Repair Information 4 15...
Page 200: ...Figure 4 20 Pull Out on the Cover 4 30...
Page 250: ...5 32...
Page 252: ...6 2...
Page 255: ...Catalog Section Parts Catalog 7 3...
Page 256: ...Assembly 1 Machine Types 2133 and 2155 System Unit Exterior 3 1 2 7 4...
Page 258: ...Assembly 2 Machine Types 2133 and 2155 System Unit Interior 1 2 3 4 5 6 7 8 11 12 12 10 7 6...
Page 261: ...12 93F0041 1 Packet Mounting Screws Parts Catalog 7 9...
Page 262: ...Assembly 3 Machine Type 2168 System Unit Exterior 2 1 7 10...
Page 267: ...Parts Catalog 7 15...
Page 268: ...Assembly 5 Diskette and Hard Disk Drives All Machine Types 1 2 3 4 4 4 4 4 7 16...
Page 273: ...Parts Catalog 7 21...
Page 274: ...Assembly 7 Keyboard and Mouse All Machine Types 1 2 7 22...
Page 284: ...Part Asm Number Index Page 93F2397 2 1 7 7 93F2398 2 1 7 7 93F2399 2 1 7 7 8 4...
Page 290: ...This page left blank intentionally A 6...
Page 296: ...This page left blank intentionally A 12...
Page 298: ...This page left blank intentionally A 14...
Page 304: ...IBM Part Number 63G2028 IBM United Kingdom PO Box 41 North Harbour Portsmouth PO6 3AU England...