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How To Use the Instruction Descriptions
7-12
7.2 How To Use the Instruction Descriptions
Section 7.3 contains detailed information on the instruction set. The descrip-
tion for each instruction presents the following categories of information:
Syntax
Operands
Opcode
Execution
Status Bits
Description
Words
Cycles
Examples
7.2.1 Syntax
Each instruction begins with a list of the available assembler syntax expres-
sions and the addressing mode type(s) for each expression. For example, the
description for the ADD instruction begins with:
ADD
dma
[,
shift
] Direct addressing
ADD
dma
, 16 Direct with left shift of 16
ADD
ind
[,
shift
[, AR
n
]] Indirect addressing
ADD
ind
, 16 [, AR
n
] Indirect with left shift of 16
ADD #
k
Short immediate addressing
ADD #
lk
[,
shift
] Long immediate addressing
These are the notations used in the syntax expressions:
italic
symbols
Italic symbols in an instruction syntax represent variables.
Example:
For the syntax:
ADD
dma
you may use a variety of values for
dma
.
Samples with this syntax follow:
ADD DAT
ADD 15
boldface
characters
Boldface characters in an instruction syntax must be typed as
shown.
Example:
For the syntax:
ADD
dma
, 16
you may use a variety of values for
dma
, but the
word ADD and the number 16 should be typed
as shown. Samples with this syntax follow:
ADD 7h, 16
ADD X, 16