screen.asm

汇编小程序

              ORG 0000H
			  AJMP MAIN
			  ORG 0030H
MAIN:         CLR P2.0
              MOV P0,#07EH
              ACALL DEL0_5S
			  MOV P0,#0FFH
			  SETB P2.0
			  CLR P2.1
			  MOV P0,#0A2H
			  ACALL DEL0_5S
			  MOV P0,#0FFH
			  SETB P2.1
			  CLR P2.2
			  MOV P0,#062H
			  ACALL DEL0_5S
			  MOV P0,#0FFH
			  SETB P2.2
			  CLR P2.3
			  MOV P0,#74H
			  ACALL DEL0_5S
			  MOV P0,#0FFH
			  AJMP MAIN
DEL0_5S:      MOV R5,#04H
DEL1:         MOV R6,#0FFH
DEL2:         MOV R7,#0FFH
DEL3:         DJNZ R7,DEL3
              DJNZ R6,DEL2
			  DJNZ R5,DEL1
			  RET
			  END