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APPENDIX A Instruction List
A.1 F
2
MC-8FX CPU Instruction Overview
This section explains the F
2
MC-8FX CPU instructions.
■ F
2
MC-8FX CPU Instruction Overview
In the F
2
MC-8FX CPU, there is 140 kinds of one byte machine instruction (as the map, 256 bytes), and the
instruction code is composed of the instruction and the operand following it.
Figure A.1-1 shows the instruction code and the correspondence of the instruction map.
Figure A.1-1 Correspondence between the Instruction Code and the Instruction Map
The following are enumerated as a feature of F
2
MC-8FX CPU instruction.
• The instruction is classified into 4 types: transfer, operation, branch, and others.
• There is various methods of address specification, and ten kinds of addressing can be selected by the
selection of the instruction and the operand specification.
• It provides with the bit operation instruction, and the read modification write can operate.
• There is an instruction that directs special operation.
Operand Operand
Machine
instructionInstruction code
1 byte
[Instruction map]
Upper 4 bits
Lower 4 bits
Give 0 to 2 bytes according to
the instruction.