简单计算器的实现

1、用8255的A口驱动六个七段数码管（LED）的字段，C口驱动六位七段数码管（LED）的位控端，右侧两位显示分值，左侧两位显示秒值。 2、段数码管采用动态扫描方式，用8253做定时器（采用查询方式），每位显示的时间50Hz。 3、以5ms为基本时间单位，计数产生秒时间值，秒计数到60时对分计数，分计数到69时对时计数。 -BUFF_KEY EQU 21H BUFF_LED1 EQU 22H BUFF_LED2 EQU 23H BUFF_LED3 EQU 24H BUFF_LED4 EQU 25H BUFF_LED5 EQU 26H BUFF_LED6

电子琴程序,典型的汇编程序-flower procedures, the typical assembler

说明：  流水心形灯，多种不同的效果，自上而下的循环以及左右循环还有循环闪烁等等(Water flow heart-shaped lamp, a variety of different effects)

E2PROM c51程序，已经在我的平台上调试通过了，芯片可以是各大厂家的24C0x系列产品。-E2PROM c51 procedures, has been in my debug platform adopted, the chip can be 24C0x major manufacturers products.

易语言仿WPE源码,可以进行截取封包发送封包处理。(Easy language source imitation WPE)

驻留程序TSR -presence procedures TSR

使用74164连接8行2列键盘的行线，74165连接键盘的列线，编写扫描键盘，包括C和汇编程序-74164 connect using 8 line 2 keyboard line, out of 74,165 lines to connect the keyboard, the preparation of scanning the keyboard, including C and assembler

双字节转BCD码-two-bit BCD switch

温度传感器的C51源程序，可使用keil直接编译执行。-temperature sensor C51 source can be used directly keil compiler implementation.

This is a book of art of assemble.Itis a very good assemble bible.With this book, you can learn assemble language very well.-This is a book of art of a very assemble.Itis bible.With good assemble this book. you can learn assemble language very well.