Preface
r""'\. This publication describes the various units of the IBM Personal
Computer; and the interaction
of
each.
The information in this publication
is
for reference, and
is
intended for hardware and program designers, programmers,
engineers, and anyone else with a knowledge of electronics
and/
or programming who needs to understand the design and
operation
of
the IBM Personal Computer.
This publication consists of two parts: a system manual and an
options and adapters manual.
The system manual
is
divided into the followirig sections:
Section 1, "System Board," discusses the component layout,
circuitry, and function
of
the system board.
Section 2, "Coprocessor," describes the Intel 8087
coprocessor and provides programming and hardware
interface information.
Section 3,
"Power
Supply," provides electrical
input/output
specifications as well as theory
of
operation for the IBM
Personal Computer power supply.
Section 4, "Keyboard," discusses the hardware make up,
function, and layout
of
the IBM Personal Computer keyboard.
Section 5, "System BIOS," describes the basic
input/output
system and its use. This section also contains the software
interrupt listing, a
BIOS
memory map, descriptions of vectors
with special meanings,
and
a set
of
low memory maps.
In
addition, keyboard encoding and usage
is
discussed.
Section 6, "Instruction Set," provides a quick reference for the
8088 assembly instruction set.
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