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基于Intel 8253定时器的两端Asm，包括配套电路，流程图  1。设计基于ISA总线的Intel 8253 的接口电路，用Intel 8253 的1个通道作定时器，演奏C调的各个音符，利用查表程序的方法依次演奏，每个音符演奏1s，停0.5s 演奏三遍后退出程序 2。利用Intel 8253的一个通道产生一个100Hz的方波，用示波器测试信号的正确性  以产生的方波作为另一个通道门控信号。利用此通道测量其高电平的宽度，在PC机显示屏上显示其数值并退出程序 -based on the Intel 8253 timer at both ends of programmers, including matching circuit, flowchart

USB声卡声卡设计原理图，说明和源代码

设计一种自动洗衣机的程序控制器，在启动后先进水，等到达高水位后，启动洗衣马达转动4min，如在洗衣过程中发现水位低于高水位，则停止洗衣马达转动并报警，并在水位到达高水位后再次启动马达。洗衣结束后则启动排水开关，待水位到达低水位后，则启动脱水马达，转动2min。如此重复三次，要求在每一动作之间有2s的间隔。 高水位，低水位为水位传感器，用两个开关模拟，当水位高于高水位或低于低水位时，两个开关的状态分别为0 。启动开关用一个开关表示。进水、排水、洗衣马达、脱水马达及报警分别用一个发光二极管表示。本实验只需用可编程并行接口电路的A口。其硬件接口如下图所示。也可采用可编程逻辑器件进行设计。 -Design of an automatic washing process controller, after commencement of advanced water, and so on to reach the high water mark, start laundry motor rotation 4min, such as in laundry water level lower than that found during the high water mark, then the motor stops rotating laundry and alarm, and the the water level reaches the high water mark again to start the motor. Laundry is started after the end of the drainage switch, when the water level reaches the low water level, then start the dehydration motors, rotating 2min. Repeat three times, each action requires the interval between the 2s. High water, low water level as water level sensors, with two analog switches, when the water

超大二进制与十进制的转化（包含十进制转化为二进制，也包含二进制转化为十进制）-Super-binary and decimal conversion (including the decimal into a binary, it contains the binary into a decimal)

单相电子式预付费电度表 的设计与实现,本程序为汇编语言.-Single-phase electronic prepaid watt-hour meter Design and Implementation of, the procedures for the assembly language.

用汇编语言写的，可以实现较大数的加法运算，带回显得显示结果-Written using assembly language, you can achieve a larger number of addition operations, it is back to show the results of

keil51的手册，开发硬件也不错呀，这是最常用的汇编工具，用的人很多-keil51 manuals, development hardware has a good game, which is a compilation of the most commonly used tools, a lot of people

汇编编译器-Compilation of the compiler

程序用中断扫描7段数码显示,有外部中断10MS中断串行通信中断等-Interruption of scanning process with paragraph 7 digital display, there are external interrupt MS serial communication interruption, such as interruption

source code for alarming