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B.1
Overview of F
2
The F
MC-8L supports 140 types of instructions.
2
I Overview of F
MC-8L instructions
2
The F
MC-8L has 140 1-byte machine instructions (256-byte instruction map). An instruction code
consists of an instruction and zero or more operands that follow.
Figure B.1-1 "Relationship between the instruction codes and the instruction map" shows the relationship
between the instruction codes and the instruction map.
Figure B.1-1 Relationship between the instruction codes and the instruction map
•
The instructions are classified into four types: transfer, arithmetic, branch, and other.
•
A variety of addressing methods is available. One of ten addressing modes can be selected depending
on the selected instruction and specified operand(s).
•
Bit manipulation instructions are provided. They can be used for read-modify-write operations.
•
Some instructions are used for special operations.
2
MC-8L Instructions
1 byte
Machine
Instruction code
instruction
Higher 4 bits
APPENDIX B Overview of Instructions
0 to 2 bytes, which are assigned
depending on the instruction
Operand
Operand
[Instruction map]
267
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