; 實(shí)驗(yàn)八:	多分支轉(zhuǎn)移實(shí)驗(yàn)程序
;文件名稱: DFZ.ASM

			TIMER0  EQU  30H
			TIMER1  EQU  31H	

			ORG 0000H
	FZCX:		MOV	A,20H
			MOV	DPTR,#TAB1	;散轉(zhuǎn)的首地址
			RL	A
			JMP	@A+DPTR
	TAB1:		AJMP	FZ0		; 0 字循環(huán)
			AJMP	FZ1		; 1 字循環(huán)
			AJMP	FZ2		; 2 字循環(huán)
			AJMP	FZ3		; 3 字循環(huán)
	FZ0:		MOV	20H,#0C0H
			LJMP	XS
	FZ1:		MOV	20H,#0F9H
			LJMP	XS
	FZ2:		MOV	20H,#0A4H
			LJMP	XS
	FZ3:		MOV	20H,#0B0H
			LJMP	XS
	XS:		MOV	A,20H		;顯示子程序
			MOV	R0,#22H
			MOV	R1,#21H
			MOVX	@R0,A
			MOV	A,#01H
	XS1:		MOVX	@R1,A
			MOV	R2,#20H
			LCALL	DELAY1S
			RL	A
			SJMP	XS1
;延時(shí)子程序
DELAY:      	PUSH  TIMER1;         延時(shí)TIMER1*1 ms for 12MHz
	  		PUSH  TIMER0
DELAY1:     	MOV   TIMER0,#250    ;循環(huán)一次需要4個(gè)機(jī)器周期，時(shí)間為4*1μS
DELAY2:     	NOP			;		 1個(gè)周期
            	NOP			;		 1個(gè)周期	
            	DJNZ  TIMER0,DELAY2  ;2個(gè)周期
	 		DJNZ  TIMER1,DELAY1
	      	POP   TIMER0
	        	POP   TIMER1
            	RET
DELAY1S:    	NOP;	      	延時(shí) 1 sec
	 		PUSH  TIMER1
	  		MOV	TIMER1,#250
	  		LCALL	DELAY
	 		LCALL	DELAY
	  		LCALL DELAY
	 		LCALL DELAY
	  		POP   TIMER1
	  		RET
	  		NOP;---------------------
END