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APPENDIX
■ Sign of the Instruction List
Table A.1-1 explains the sign used by describing the instruction code in the table.
Table A.1-1 Sign of the Instruction List
Notation Meaning
dir Direct address (8 bits)
off Offset (8 bits)
ext Extended address (16 bits)
#vct Vector table number (3 bits)
#d8 Immediate data (8 bits)
#d16 Immediate data (16 bits)
dir:b Bit direct address (8 bits: 3 bits)
rel Relative branch address (8 bits)
@ Register indirect (example: @A, @IX, @EP)
A Accumulator (8-bit or 16-bit length is determined by instruction to be used.)
AH Upper 8 bits of accumulator (8 bits)
AL Lower 8 bits of accumulator (8 bits)
T Temporary accumulator (8-bit or 16-bit length is determined by instruction to be used.)
TH Upper 8 bits of temporary accumulator (8 bits)
TL Lower 8 bits of temporary accumulator (8 bits)
IX Index register (16 bits)
EP Extra pointer (16 bits)
PC Program counter (16 bits)
SP Stack pointer (16 bits)
PS Program status (16 bits)
dr Accumulator or index register (16 bits)
CCR Condition code register (8 bits)
RP Register bank pointer (5 bits)
DP Direct bank pointer (3 bits)
Ri General-purpose register (8 bits, i = 0 to 7)
X X indicates immediate data. (8-bit or 16-bit length is determined by instruction to be used.)
(X) The contents of X are to be accessed. (8-bit or 16-bit length is determined by instruction to be used.)
((X)) The address indicated by the contents of X is to be accessed. (8-bit or 16-bit length is determined by
instruction to be used.)