8051 Program – bubble sort descending order

; bubble sort descending order
; external memory
	ORG 0H
	MOV R0,#05
L1:	MOV DPTR,#9000H
	MOV A,R0
	MOV R1,A
L2:	MOVX A,@DPTR
	MOV B,A
	INC DPTR
	MOVX A,@DPTR
	CLR C
	MOV R2,A
	SUBB A,B
	JC NOEXCHG
	MOV A,B
	MOVX @DPTR,A
	DEC DPL
	MOV A,R2
	MOVX @DPTR,A
	INC DPTR
NOEXCHG:	DJNZ R1,L2
	DJNZ R0,L1
	SJMP $
	ORG 9000H
	DB 2,5,1,9,7,6
	END
; Result: 9000:09, 07, 06,05,02,01

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List of topics: 8051

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