Zenith Z-100 Series, Reference Manual

Page: 46 / 163

Chapter 4
Central Processing Unit
Introduction
The CPU in your computer contains an 8088 microprocessor, DMA and interrupt
processing circuitry, system clock, and timing and control generation circuitry.
From a programming standpoint, the CPU functions are largely accessed through
the built-in ROM routines, or by means of iAPX 88 assembly level instructions.
The instruction set and programming information for the 8088 microprocessor
are detailed in the iAPX 88 Book included in this package, and will not be repeated
here. Only the information pertinent to the unique features and functions of your
machine will be addressed in this chapter.
Refer also to Chapter 2 for details on the use of the built-in ROM routines as
they apply to CPU operations.