用2051制的绕线机[5位数+可预置数+减速+可逆计数器

实现2*2键盘扫描，使用的扫描方式为行列扫描法-Realize 2* 2 keyboard scan, used for scanning the ranks of scanning method

一、 使用键盘显示接口芯片8279接收按键键值，并在七段数码管上显示出来，通过判断键值进入相应音乐播放处理程序。在音乐播放程序中，使用定时器/计数器8253的计数器2，使其工作在方式¬ ¬ 3―方波发生器，通过查表依次取出乐曲频率值送入计数器作为计数初值，经out2输出方波，驱动扬声器发出不同频率的声音，在每个音阶之间加入相应的延迟时间，即实现了音乐的播放。-First, the use of a keyboard display interface chip receive keys keys 8279, and Seven-Segment LED display, through to determine the corresponding music player keys to enter the treatment program. Procedures in the music player, use the timer/counter 2 counter 8253 to work in the way ? ? 3- square-wave generator, followed by out music through the look-up table values into the counter as a frequency count of the initial value, the output side out2 waves, driven loudspeakers of different frequency sound, in between each scale by adding the appropriate delay time, namely, the realization of the music player.

1621的应用,在很多系统中经常见到这种应用,现给大家参考.-1621 applications, in many systems we often see this application, it is for your reference.

a fouth program, python coded, Chinese segmentor

汇编指令代码详解-code Comments on the compilation instructions

汇编语言编写的TI54xxd的带通滤波器程序-assembly language TI54xxd prepared by the band-pass filter process

6502bios,关于6502的sbc,有lcd,time,irq,模块-6502bios, on the SBC 6502, LCD, time, irq, module

硬件试验的源代码，和好-hardware test source code, and good

多位bcd码乘法,已测试通过,多位bcd码乘法,已测试通过-Bcd number multiplication code, have been tested, a number of bcd code multiplication, have been tested

本程序是一个用汇编编的精致的图形时钟，运行时双击clock图标即可，钟表显示的时间为本机系统的时间。　　按b键可扩大画面 ；按s键可缩小画面；按c键可改变颜色；按e键可听音乐；按q键退出本程序.-this program is compiled using a series of intricate graphics clock, double-click the clock running icon, watches showed the time-based system of the machine. By b Bond picture can be expanded; According s keys can narrow picture; By c Bond can change color; By e keys to listen to music; Q keys on the withdrawal procedures.