Sign of the Instruction List

APPENDIX

■Sign of the Instruction List

		Table A.1-1explains 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.)

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