用8251a实现串行口异步通信，自发自收，波特率1200bps，采用查询方式发送，中断方式接受。自收结果显示于屏幕。按esc返回dos...

vb和c++结合语言，相关程序-vb and c combined language, procedures

操作EXCEL数据和表格的好源码,是从月光源码网站上下载下来的,很好学习,十分感受谢源码编写者,-EXCEL operation data and forms a good source is from the source Web site to download the moonlight down, good learning, feeling very grateful to source authors,

PIC16F877实现按键扫描和数码管显示、蜂鸣片同时DD响，当按键下时，数码管加一，蜂鸣片DD响两次。-PIC16F877 to achieve key-scan and digital tube display, beep sound piece at the same time DD, when the button when you are not, the digital control plus one, beep piece DD ring twice.

编译原理实验，用lex和yacc编写的简单绘图工具-Compilation Principle experiments, lex and yacc with a simple drawing tools to prepare

拖动鼠标画线，圆，矩形的例子-Drag painting line, circle, rectangle example

中断列表(1) 352K-suspended list (1) 352K

从键盘读入一个四位的十六进制数，CRT显示等值的二进制数. 由于每个十六进制数位对应4个二进制，所以每读入一个十六进制位后，即可将其对应的4个二进制位依次输出。由于数字‘０’~ ‘９’的ASCⅡ码为30H～39H,字母‘a’～‘f’与 ‘A’～‘F’的ASCⅡ码为61H～66H 与41H～46H ，因此，如果输入的字母为数字‘０’～‘９’，则其低４位即为对应的二进制位；如果输入的字符为字母‘ａ’～‘ｆ’或‘Ａ’～‘Ｆ’，则需要减７，然后通过移位将低４位依次输出。 -Reading from the keyboard into a 4 hexadecimal number, CRT display equivalent binary number. Since each hexadecimal number of the corresponding 4-bit binary, so every time into a hexadecimal places, can be its corresponding 4-bit binary sequence output. Due to the number

89c2051 外部中断检测 通过max232与PC通讯 发送数据-89c2051 through max232 Detect external interrupt communication with the PC to send data

文本编辑器（A3） 3.3.1设计题目及要求 三， 文本编辑器（10） 要求：（1）编辑文本； （2）保存、打开指定位置的文本文件； （3）具有输入输出界面。-A text editor (A3) 3.3.1 Design and requirements of Title III, a text editor (10) requires: (1) Edit the text (2) to preserve, open the text file specified location (3) with input and output interfaces.

通过汇编语言设计将输入一组十进制数，按从小到大到顺序输出-Through assembly language will be designed to enter a decimal number one group, according to the order from small to large output