User’s Manual
Z80 CPU
UM008005-0205 Manual Objectives
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Z80 CPU Instruction Description
Presents the User’s Manual instruction types, addressing modes and
instruction Op Codes.
Z80 Instruction Set
Presents an overview of the User’s Manual assenbly language, status
indicator flags and the Z80 instructions.
Related Documents
Manual Conventions
The following assumptions and conventions are adopted to provide clarity
and ease of use:
Use of the Words Set and Clear
The words set and clear imply that a register bit or a condition contains
the values logical 1 and logical 0, respectively. When either of these
terms is followed by a number, the word logical may not be included, but
it is implied.
Notation for Bits and Similar Registers
A field of bits within a register is designated as: Register (n–n). For
example:
PWM_CR (31–20). A field of bits within a bus is designated as:
Bus
n–n
. For example: PCntl
7–4
. A range of similar (whole) registers is
designated as: Registern–Registern. For example: OPBCS5–OPBCS0.
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