cont.asm

上课老师给的8086仿真器

	ORG 02A0H
CONT:	MOV SP,#53H
	MOV TMOD,#05H
	MOV TH0,#00H
	MOV TL0,#00H
	SETB TR0
CONT1:	MOV R2,TH0
	MOV R3,TL0
	LCALL CONT2
	MOV R0,#79H
	MOV A,R6
	LCALL PWOR
	MOV A,R5
	LCALL PWOR
	MOV A,R4
	LCALL PWOR
	LCALL DISP
	SJMP CONT1
CONT2:	CLR A
	MOV R4,A
	MOV R5,A
	MOV R6,A
	MOV R7,#10H
CONT3:	CLR C
	MOV A,R3
	RLC A
	MOV R3,A
	MOV A,R2
	RLC A
	MOV R2,A
	MOV A,R6
	ADDC A,R6
	DA A
	MOV R6,A
	MOV A,R5
	ADDC A,R5
	DA A
	MOV R5,A
	MOV A,R4
	ADDC A,R4
	DA A
	MOV R4,A
	DJNZ R7,CONT3
	RET
PWOR:	MOV R1,A
	LCALL PWOR1
	MOV A,R1
	SWAP A
PWOR1:	ANL A,#0FH
	MOV @R0,A
	INC R0
	RET
DISP:	SETB 0D4H
	MOV R1,#7EH
	MOV R2,#20H
	MOV R3,#00H
DISP1:	MOV DPTR,#0FF21H
	MOV A,R2
	MOVX @DPTR,A
	MOV DPTR,#CDATA
	MOV A,@R1
	MOVC A,@A+DPTR
	MOV DPTR,#0FF22H
	MOVX @DPTR,A
DISP2:	DJNZ R3,DISP2
	DEC R1
	CLR C
	MOV A,R2
	RRC A
	MOV R2,A
	JNZ DISP1
	MOV A,#0FFH
	MOV DPTR,#0FF22H
	MOVX @DPTR,A
	CLR 0D4H
	RET
CDATA:	DB 0C0H,0F9H,0A4H,0B0H,99H,92H,82H,0F8H,80H,90H
	DB 88H,83H,0C6H,0A1H,86H,8EH,0FFH,0CH,89H,0DEH
	END