汇编语言程序设计（第二版）课后答案，从第二章开始！

可以还源星号密码，是汇编朋友学习的好教材-You can also source an asterisk password, the compilation is good material for a friend to learn

AT89S51的并行口P1接4×4矩阵键盘，以P1.0－P1.3作输入线，以P1.4－P1.7作输出线；在数码管上显示每个按键的“0－F”序号。-AT89S51 the parallel port P1 then 4 × 4 matrix keyboard to P1.0-P1.3 as input lines to P1.4-P1.7 for output line in the digital control button displayed on each of the " 0-F" serial number.

这是PC机间相互通信的例子，程序“require”为用查询方式实现，程序“interrupt”为 用中断方式实现-PC communication among the examples procedures "require" to be used for achieving and procedures "interrupt" for the use of interruption means

压缩包解压时不能有密码，使用方便请认真书写上传资料的详细功能-Archive decompression there can not be password, easy to use upload data to write carefully detailed feature

按键扫描,有很多系统都用到按键控制操作,按键扫描功能的程序是不可小的.-Buttons to scan, there are many systems used to control the operation buttons, button scanning procedure can not be small.

易语言的一个小代码! 很不错的!大家都支持一下吧-Easy language to a small code! Very good! U.S. support yourself

电子钟源码，修改版，带温度计，完整汇编程序下载。-Electronics clock source, modified version with a thermometer, complete download assembler.

4*4键盘扫描，依据键值，LCD双行显示，双行显示满后，清屏，重新显示-4* 4 keyboard scanning, based on keys, LCD double display, double line after the expiry of the Qing-ping, re-display

五个按键：关机off键，开机on键，五分钟定时键，十分钟定时键，二十分钟定时键，按相应的按键实现相应的功能，输出4HZ的方波-5 buttons: off off key, turn on key, five minutes from time to time key, 10 minutes from time to time key, 20 minutes from time to time, press the corresponding button to achieve the corresponding functions of the square wave output of 4HZ

stepper_motor一个旋转的时钟-stepper_motor a rotating clock