汇编小程序

				A51 MACRO ASSEMBLER  PROJECT                                                              07/08/2012 21:14:42 PAGE     1
				
				
				MACRO ASSEMBLER A51 V8.02a
				OBJECT MODULE PLACED IN project.OBJ
				ASSEMBLER INVOKED BY: C:\Keil\C51\BIN\A51.EXE project.asm SET(SMALL) DEBUG EP
				
				LOC  OBJ            LINE     SOURCE
				
				0000                   1                     ORG 0000H
				0000 0130              2                                     AJMP MAIN
				0030                   3                                     ORG 0030H
				0030 74FB              4     MAIN:           MOV A,#0FBH                     ;累加器A放入0FBH
				0032 7824              5                     MOV R0,#024H            ;寄存器R0放入初始值024H
				0034 F4                6                                     CPL A                           ;累加器A求反
				0035 F580              7                                     MOV P0,A                        ;把累加器A的内容放入P0口
				0037 74FB              8                                     MOV A,#0FBH                     ;累加器A放入初始值0FBH
				0039 48                9                                     ORL A,R0                        ;寄存器R0与累加器A相‘或’