project.asm

汇编小程序

                ORG 0000H
				AJMP MAIN
				ORG 0030H
MAIN:           MOV A,#0FBH			;累加器A放入0FBH
                MOV R0,#024H		;寄存器R0放入初始值024H
				CPL A				;累加器A求反
				MOV P0,A			;把累加器A的内容放入P0口
				MOV A,#0FBH			;累加器A放入初始值0FBH
				ORL A,R0			;寄存器R0与累加器A相‘或’并把结果发送给累加器A
				ACALL DEL			;延时
				AJMP MAIN			;跳到主程序
DEL:            MOV R5,#01H			;延时子程序
DEL1:           MOV R6,#0FFH
DEL2:           MOV R7,#0FFH
DEL3:           DJNZ R7,DEL3
                DJNZ R6,DEL2
				DJNZ R5,DEL1
				RET
				END