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APPENDIX A Instruction List
■ Item in Instruction Table
Table A.1-2 explains the item of instruction table.
Table A.1-2 Item in Instruction Table
Item Description
NMEMONIC The assembly description of the instruction is shown.
RD The read of an internal bus is shown.
WR The write of an internal bus is shown.
RMW The read modification write signal of an internal bus is shown.
~ Cycle of the instruction number is shown. One instruction cycle is one machine cycle.
Note:
The instruction cycle number might be postponed one cycle by the immediately preceding instruction.
Moreover, cycle of the instruction number might be extended in the access to the IO area.
# The number of bytes for the instruction is shown.
Operation The operation of the instruction is shown.
TL, TH, AH The change in the content when TL, TH, and AH each instruction is executed is shown. The sign in the
column shows the following respectively.
• - : Do not change.
• dH : Upper 8 bits of the data written in operation
• AL, AH : Become the contents of AL or AH immediately before instruction.
• 00 : Become 00.
N, Z, V, C The flag changed when each instruction is executed is shown. The sign in the column shows the
following respectively.
• - : Do not change.
• + : Change.
• R : Become 0.
• S : Become 1.
OP CODE The code of the instruction is shown. When a pertinent instruction occupies two or more codes, it
follows the following description rules.
48 to 4F: 48, 49, ..., 4F are shown.