1.2.1 Processor Board
The processor board is connected to the system through two dedicated
in-line system-board connectors. The major components on the processor
board are the system microprocessor, the system clock, the direct memory
access (DMA) controller, and the memory controller.
The system microprocessor is a 32-bit microprocessor that operates in the
real-address mode or in the virtual-address (protected) mode.
The amount of memory supported and the clock speed vary with the type of
processor board installed.
IBM PS/2 Model 90 XP 486 HMR
Processor Board
¦ Copyright IBM Corp. 1990, 1991
1.2.1 - 1
