Fujitsu 8FX User Manual

MB95630H Series
MN702-00009-2v0-E FUJITSU SEMICONDUCTOR LIMITED 613
APPENDIX A Instruction Overview
A.1 Addressing
A.1 Addressing
F
2
MC-8FX has the following ten types of addressing:
• Direct addressing
• Extended addressing
• Bit direct addressing
• Index addressing
• Pointer addressing
• General-purpose register addressing
• Immediate addressing
• Vector addressing
• Relative addressing
• Inherent addressing
■ Explanation of Addressing
●
Direct addressing
This is used when accessing the direct area of "0x0000" to "0x047F" with addressing indicated
"dir" in instruction table. In this addressing, when the operand address is "0x00" to "0x7F", it is
accessed into "0x0000" to "0x007F. Moreover, when the operand address is "0x80" to "0xFF",
the access can be mapped in "0x0080" to "0x047F" by setting of direct bank pointer DP.
Figure A.1-1 shows an example.
Figure A.1-1 Example of Direct Addressing
● Extended addressing
This is used when the area of the entire 64 Kbyte is accessed by addressing shown "ext" in the
instruction table. In this addressing, the first operand specifies one high rank byte of the address
and the second operand specifies one subordinate position byte of the address.
Figure A.1-2 shows an example.
Figure A.1-2 Example of Extended Addressing
MOV 92H, A
0x45
0x45A
0x112
0b001
DP
0x1234
MOVW A, 1 2 3 4H
0x5678A
0x56
0x780x1235

Fujitsu 8FX Specifications

General

Brand	Fujitsu
Model	8FX
Category	Computer Hardware
Language	English