倒记时电路 用在交通灯

汇编操作蜂鸣器演奏音乐的例程，使用MASM6.15编译通过-operation of buzzer

汇编小游戏，主要是坦克打靶，通过控制坦克来击打天空中飞来飞去的靶子-Compilation of small games, mainly targeting tanks, by controlling the tank to hit the sky flying target

4x4键盘 P2作输入P1作输出(注意接线)-4x4 keyboard input P2 for P1 for output (note the connection)

本程序需在DOS下运行。每运行一次可执行程序random.exe，即可显示任意两个 16进制数的加法或减法表达式及其运算结果。在减法运算中，如果被减数小于减数，显示 “Divide Overflow”的提示信息。-the process required under the DOS operating. Every time running executable random.exe can display any number of two 16-band addition or subtraction of expression and the results of operations. The subtraction operation, if less than subtrahend minuend, shows that the "Divide Overflow" message.

汇编语言实现的实现在字符串中查找指定的字母出现的次数,-assembly language to achieve the realization of the specified string of letters identifying the number of occurrences

用汇编设计音乐程序-with music compilation design procedures

与中断矢量设置与读取有关的DOS功能调用，本例演示了如何编写中断服务程序，如何安装（将中断服务程序的地址设置到中断矢表中），以及如何通过软中断指令调用中断服务程序。为了突出重点，本例中中断服务程序代码未驻留内存。-and vector interrupt settings and read the DOS function calls, which in this case demonstrated how to prepare interrupted service procedures, how to install (to be interrupted service procedures set up to address the interruption vector table), and how soft interrupt directive calling service interruption program. To highlight key issues, in this case the interruption of services not the presence of code memory.

应用很广泛的反汇编软件合集，可以方便的进一步改进程序-Application of a wide range of anti-compiled a collection of software, it will be convenient to further improve procedures

(1) 要求本文件系统采用两级目录，即设置主文件目录[MFD]和用户文件目录[UFD]。在主文件目录中，每 个用户目录都占有一个目录项，其目录项中包含文件名和指向该文件目录文件。在用户文件目录UFD中， 这些文件目录具有相似的结构。具体测试时可考虑：设计一个10个用户的文件系统，每次用户可保存10 个文件，一次运行用户可以打开

双字节转BCD码-two-bit BCD switch