此程序对端口进行测试，保证其方向的正确性。

很好的汇编代码,实现学生成绩分类系统,采用子程序调用,完成学生成绩管理-good compilation of code, to achieve the performance of their students classification system used subroutine call, students complete performance management

cmos编程....设计到一些底层的技术-the program about the cmos

这是一个倒计时器，有点缺陷，需要改进，因为我是一个初学者-This is a countdown device, a little flaw, the need to improve, because I am a beginner

我刚写好的，已调试成功，HT1621的汇编和一键多功能的汇编。-I have just written has been successfully debug, HT1621 one compilation and the compilation of multi-function keys.

综合运用8259A,8253,8255A三个接口芯片， 编程使六个交通灯，按交通灯变化规律，循环点亮或熄灭。

调试通过了的基于89S51的1602液晶显示的程序-Debug adopted 89S51-based liquid crystal display of the 1602 procedure

zlg7289的源程序，可以做参考-zlg7289 source, reference can be done

汇编语言二进制转换为十六进制模块，代码正确。。。。希望有用-Assembly language is converted to hexadecimal binary module, the code correctly. . . . Want to be useful

8051 a/D2500，lcd 128x64演示程序

HPA磁盘隐藏分区的安装生成源码，在MASM编译上可以通过，主要调用BIOS中断，端口等实现操作。-HPA hidden disk partition to install to generate source code in MASM compiler can be passed, the main BIOS interrupt call, port and so realize the operation.