NET		EQU		20H				
LEN		EQU		0E0H				
POINT	EQU		0F0H					
N		DATA	3EH				
K		DATA	3FH					
TST:	
MOV	SP,#5FH						
MOV	DPTR,#NETDAT				
MOV	P2,#NET
MOV	R0,#0
MOV	R2,#80H
CPY:	
CLR		A
MOVC	A,@A+DPTR
MOVX	@R0,A
INC		DPTR
INC		R0
DJNZ	R2,CPY
MOV	DPH,#NET					
MOV	DPL,#0
MOVX	A,@DPTR					
INC		A
MOV	N,A						
MOV	K,#1							
TEST1:	
LCALL	MINTREE					
INC		K							
MOV	A,K
CJNE	A,N,TEST1
STOP:	LJMP	STOP
MINTREE:
OV		DPH,#NET				
MOV	DPL,#0
MOVX	A,@DPTR						
MOV	R7,A							
MOV	R6,A
CLEAR:
MOV	A,DPL						
ADD		A,#10H
MOV	DPL,A
CLR		A
MOVX	@DPTR,A						
DJNZ	R6,CLEAR
MOV	P2,#NET						
MOV	A,K							
MOV	R2,A
SWAP	A
MOV	R1,A							
MOV	A,#1
MOVX	@R1,A						
MOV	R0,#LEN						
MOV	A,R7
MOV	R6,A							
MINTR:	
INC		R1							
INC		R0	
MOVX	A,@R1					
MOVX	@R0,A					
DJNZ	R6,MINT
MOV	R0,#POINT				
MOV	A,R7							
MOV	R6,A
MOV	A,R2							
MINTR1:	
INC		R0
MOVX	@R0,A						
DJNZ	R6,MINTR1
MOV	A,R2
ADD		A,#POINT
MOV	R0,A							
MOV	A,#0
MOVX	@R0,A						
MOV	A,R7
DEC		A
MOV	R3,A							
MINTR2:	
OV		R4,#0FFH						
MOV	R5,#0						
MOV	R0,#LEN+1				
MOV	R1,#10H					
MOV	A,R7	
MOV	R6,A						
MINTR3:	
MOVX	A,@R1					
JNZ		MINTR4						
MOVX	A,@R0						
CLR		C
SUBB	A,R4							
JNC		MINTR4						
MOVX	A,@R0
MOV	R4,A						
MOV	A,R0
ANL		A,#0FH						
MOV	R5,A							
MINTR4:	
INC		R0							
MOV	A,R1						
ADD		A,#10H
MOV	R1,A
DJNZ	R6,MINTR3					
MOV	A,R5						
SWAP	A
MOV	R0,A						
MOV	A,#1
MOVX	@R0,A						
INC		R0							
MOV	DPL,#LEN+1					
MOV	R1,#10H						
MOV	A,R7
MOV	R6,A							
MINTR6:	
MOVX	A,@R1						
JNZ		MINTR7					
MOVX	A,@R0						
MOV	R2,A							
MOVX	A,@DPTR						
SETB	C
SUBB	A,R2						
JC		MINTR7					
MOV	A,R2							
MOVX	@DPTR,A						
MOV	A,R0						
MOV	R2,A
ANL		A,#0FH
ADD		A,#POINT
MOV	R0,A							
MOV	A,R5							
MOVX	@R0,A	;
MOV	A,R2						
MOV	R0,A
MINTR7:	
INC		R0							
INC		DPTR	;
MOV	A,R1	;
ADD		A,#10H
MOV	R1,A
DJNZ	R6,MINTR6					

;2010H: 00 00 04 07 06 FF FF FF
;2020H: 00 04 00 FF 09 08 FF FF
;2030H: 00 07 FF 00 08 FF 05 FF
;2040H: 00 06 09 08 00 05 03 04
;2050H: 00 FF 08 FF 05 00 FF 02
;2060H: 00 FF FF 05 03 FF 00 09
;2070H: 00 FF FF FF 04 02 09 00
;20E0H: 00 00 00 00 00 00 00 00				
;20F0H: 00 00 00 00 00 00 00 00				
NETDAT:	
DB		07H,41H,42H,43H
DB		44H,45H,46H,47H
DB		00H,00H,00H,00H
DB		00H,00H,00H,00H
DB		00H,00H,04H,07H
DB		06H,0FFH,0FFH,0FFH
DB		00H,00H,00H,00H
DB		00H,00H,00H,00H
DB		00H,04H,00H,0FFH
DB		09H,08H,0FFH,0FFH
DB		00H,00H,00H,00H
DB		00H,00H,00H,00H
DB		00H,07H,0FFH,00H
DB		08H,0FFH,05H,0FFH
DB		00H,00H,00H,00H
DB		00H,00H,00H,00H
DB		00H,06H,09H,08H
DB		00H,05H,03H,04H
DB		00H,00H,00H,00H
DB		00H,00H,00H,00H
DB		00H,0FFH,08H,0FFH
DB		05H,00H,0FFH,02H
DB		00H,00H,00H,00H
DB		00H,00H,00H,00H
DB		00H,0FFH,0FFH,05H
DB		03H,0FFH,00H,09H
DB		00H,00H,00H,00H
DB		00H,00H,00H,00H
DB		00H,0FFH,0FFH,0FFH
DB		04H,02H,09H,00H
END