8051 Program – move block of data with overlap

; move block of data bytes
; with overlap
	ORG 0H
START:
	MOV R1,#10H	;starting addr of src
	MOV R2,#20H	;ending addr of src
	MOV R0,#15H	;starting addr of desti
	CLR C
	MOV A,R2
	SUBB A,R1
	MOV R2,A	;determination of sizeAnd stored in R2
	MOV A,R1
	ADD A,R2
	MOV R1,A	;end addr of src
	MOV A,R0
	ADD A,R2
	MOV R0,A	;end addr of desti
	INC R2
LOOP:	MOV A,@R1
	MOV @R0,A	;copy data byte
	DEC R1
	DEC R0
	DJNZ R2,LOOP
	SJMP $
	END

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List of topics: 8051

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