Processor Board - IBM PS/2 90 XP 486 Hardware Maintenance Reference

8.6 Processor Board

Use the following information to locate the connectors and jumpers on the
various processor boards, and to identify the purpose of those connectors
and jumpers.
Note: The locations may vary slightly.
1 Processor connector (all boards).
2 Option Processor connector (25-MHz boards without Cache) is for a 487SX
processor with math capability.
3 Jumper (20-boards MHz).
installed, the jumper must be in positions 1 and 2.
processor is not installed, the jumper must be in positions 2 and 3.
Note: On the 20-MHz board, if a 487SX processor is installed, it is in
connector 1.
4 Cache connector (all boards that support Cache).
IBM PS/2 Model 90 XP 486 HMR
Processor Board
If a 487SX processor (labeled 487SX) is
PICTURE 27
¦ Copyright IBM Corp. 1990, 1991
8.6 - 1
If a 487SX