Intel 210200-002 manual Usage Accumulator Count

APPENDIX

BENCHMARK: Character Search

PROCESSOR: Motorola 6809

			;REGISTER			USAGE:
					A -	ACCUMULATOR
					B -	COUNT
					X -	TABLE POINTER
Bytes	Cycles
3	3	-LOX	#PTR			;Initialize Table			Pointer
2	2	LOA	#CHAR			;Search character
2	2	LOB	#40			;Initialize count
2	6 AGAIN	CMPA	,X+			; Compare ,		autoincrement
2	3	BEQ	PASTPTR			;Jump if found
1	2	OECB				; Decrement		count
2	3	BNE	AGAIN			;00	again	unless B=O
3	3	LOX	#1			;Not	found: X will		return 0
2	5 PASTPTR	LEAX	- 1, X			;Adj ust X
		19	bytes	of	code
		9 lines		of	code

36 AFN 01532A