IBM PS/2 90 XP 486 Hardware Maintenance Reference page 22

2.4 System Memory
The figure below shows the location of the Model 90 four memory-module-kit
connectors J4 to J1 on the memory-riser cards.
system-board connectors J11 and J14.
The system supports up to 64MB of memory, but the amount of memory
accessed may be limited by the operating system.
The figure below shows the location of the Model 95 memory-module-kit
connectors B1 to A4 on the system board.
The system board has eight connectors for system-board memory-module kits.
The system supports up to 64MB of memory on the system board, but the
amount of memory accessed may be limited by the operating system.
Subtopics
2.4.1 Memory Requirements and Limitations
2.4.2 Types of Memory Configurations
2.4.3 Types of Error Detection
2.4.4 Memory Errors
IBM PS/2 Model 90 XP 486 and 95 XP 486 HMR
System Memory
The riser cards plug into
PICTURE 3
PICTURE 4
¦ Copyright IBM Corp. 1990, 1992
2.4 - 1