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This chapter lists the instruction set of the
language (instruction code) of each instruction, refer to 78K/0S Series Instructions User's Manual (U11047E).
21.1 Operation
21.1.1 Operand identifiers and description methods
Operands are described in the "Operand" column of each instruction in accordance with the description method of
the instruction operand identifier (refer to the assembler specifications for details). When there are two or more
description methods, select one of them. Uppercase letters and the symbols #, !, $, and [ ] are keywords and are
described as they are. Each symbol has the following meaning.
• #:
Immediate data specification
• !:
Absolute address specification
In the case of immediate data, describe an appropriate numeric value or a label. When using a label, be sure to
describe the #, !, $ and [ ] symbols.
For operand register identifiers, r and rp, either functional names (X, A, C, etc.) or absolute names (names in
parenthesis in the table below, R0, R1, R2, etc.) can be used for description.
Identifier
r
X (R0), A (R1), C (R2), B (R3), E (R4), D (R5), L (R6), H (R7)
rp
AX (RP0), BC (RP1), DE (RP2), HL (RP3)
sfr
Special function register symbol
saddr
FE20H to FF1FH Immediate data or labels
saddrp
FE20H to FF1FH Immediate data or labels (even addresses only)
addr16
0000H to FFFFH Immediate data or labels (only even addresses for 16-bit data transfer instructions)
addr5
0040H to 007FH Immediate data or labels (even addresses only)
word
16-bit immediate data or label
byte
8-bit immediate data or label
bit
3-bit immediate data or label
Remark
See Table 3-4 Special Function Registers for symbols of special function registers.
332
CHAPTER 21 INSTRUCTION SET
µ
PD789489 Subseries. For details of the operation and machine
• $:
• [ ]: Indirect address specification
Table 21-1. Operand Identifiers and Description Methods
User's Manual U15331EJ4V1UD
Relative address specification
Description Method
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