GRAPH	EQU		20H				
OUT		EQU		21H					
QUEUE	EQU		1FH				
F		DATA	3CH					
R		DATA	3DH				
N		DATA	3EH					
K		DATA	3FH					
TST:	
MOV	SP,#5FH						
MOV	DPTR,#GRA					
MOV	P2,#GRAPH
MOV	R0,#0
MOV	R2,#0A0H
CPY:	
CLR	A
MOVC	A,@A+DPTR
MOVX	@R0,A
INC	DPTR
INC	R0
DJNZ	R2,CPY
MOV	P2,#GRAPH					
MOV	R0,#0
MOVX	A,@R0					
JZ	STOP							
INC	A
MOV	N,A							
MOV	K,#1							
TST1:	
MOV	DPH,#OUT					
MOV	DPL,#0
MOV	R2,#0
CLR	A
CLEAR:	
MOVX	@DPTR,A						
INC	DPTR
DJNZ	R2,CLEAR
MOV	P2,#GRAPH					
MOV	R0,#0
MOV	DPH,#OUT					
MOV	DPL,#0
MOVX	A,@R0					
MOVX	@DPTR,A						
MOV	R7,A							
INC		DPTR					
MOV	R0,#10H						
CLRF:	
CLR		A
MOVX	@R0,A
MOV	A,#10H					
ADD		A,R0
MOV	R0,A
JNZ		CLRF
LCALL	SETNULL					
MOV	A,K							
LCALL	DATAIN						
LCALL	BFS						
INC		K						
MOV	A,K
CJNE	A,N,TEST1				
STOP:	LJMP	STOP
;出發點為1時的遍歷順序：ABHCIGDFE
;出發點為2時的遍歷順序：BACIHDFGE
;出發點為3時的遍歷順序：CBDFAIEGH
;出發點為4時的遍歷順序：DCEBFGAIH
;出發點為5時的遍歷順序：EDFGCIHBA
;出發點為6時的遍歷順序：FCEGIBDHA
;出發點為7時的遍歷順序：GEFHDCIAB
;出發點為8時的遍歷順序：HAGIBEFCD
;出發點為9時的遍歷順序：IBFHACEGD
BFS:	
MOV	A,F						
XRL		A,R
JZ		BFSEND					
LCALL	DATAOUT					
MOV	R0,A
MOVX	A,@R0						
MOVX	@DPTR,A						
INC		DPTR
MOV	A,R0						
SWAP	A
MOV	R1,A
MOV	A,#0FFH
MOVX	@R1,A					
INC		R1							
MOV	A,R7
MOV	R6,A
LOOP:	
MOVX	A,@R1					
JZ		LOOPE					
MOV	A,R1						
ANL		A,#0FH
MOV	R2,A							
SWAP	A
MOV	R0,A
MOVX	A,@R0						
JNZ		LOOPE					
MOV	A,R2
LCALL	DATAIN						
MOV	A,#1
MOVX	@R0,A					
LOOPE:	
INC		R1							
DJNZ	R6,LOOP						
LJMP	BFS							
BFSEND:	
RET									
SETNULL:
MOV	A,#0FFH
MOV	F,A							
MOV	R,A						
RET									
DATAIN:	
PUSH	DPH
PUSH	DPL
INC		R						
MOV	DPL,R
MOV	DPH,#QUEUE
MOVX	@DPTR,A						
POP		DPL
POP		DPH
RET									
DATAOUT:
PUSH	DPH
PUSH	DPL
INC		F						
MOV	DPL,F
MOV	DPH,#QUEUE
MOVX	A,@DPTR						
POP		DPL
POP		DPH
RET									
;2000H: 09 41 42 43 44 45 46 47 48 49
;2010H: 00 00 01 00 00 00 00 00 01 00
;2020H: 00 01 00 01 00 00 00 00 00 01
;2030H: 00 00 01 00 01 00 01 00 00 00
;2040H: 00 00 00 01 00 01 00 00 00 00
;2050H: 00 00 00 00 01 00 01 01 00 00
;2060H: 00 00 00 01 00 01 00 01 00 01
;2070H: 00 00 00 00 00 01 01 00 01 00
;2080H: 00 01 00 00 00 00 00 01 00 01
;2090H: 00 00 01 00 00 00 01 00 01 00
GRA:	
DB		09H,41H,42H,43H				
DB		44H,45H,46H,47H
DB		48H,49H,00H,00H