利用PC键盘和CRT显示器设计一个电子琴，首先在CRT显示器上模拟出琴键的画面，然后要求在不同的情况下按下键盘上“1~7”中任意数字键，可弹奏出与之相应的音调,且在模拟键盘上标示出对应的那个键来。 设计应完成以下功能: (1)按“1~7”中的任一数字键,则发出对应的中音. (2)若同时按下“高音键”和“1~7”中的任一数字键,则发出对应的高音。 (3)若同时按下“低音键”和“1~7”中的任一数字键,则发出对应的低音。 (4)发声的节拍根据按键的长短决定。 (5)根据键盘按下的键让对应的琴键发生变化。 (6)可以实现两音调的选择。 (7)可以预先存放5首曲子，按下不同的按键则对演奏出不同的曲子。 (8)按下“结束键”,程序运行结束,返回到DOS状态
上传时间： 2016-03-17
上传用户：talenthn
这是PC机间相互通信的例子，程序“require”为用查询方式实现，程序“interrupt”为 用中断方式实现
上传时间： 2014-11-01
上传用户：515414293
adc检测串口反馈到PC上,数据不断发送，以显示电压变化
上传时间： 2016-03-17
上传用户：小宝爱考拉
视频COEDC SAA7113 7121 SDK和应用程序
上传时间： 2016-03-17
上传用户：aix008
短信引擎SDK使用手册.doc 短信开发参考
上传时间： 2016-03-17
上传用户：caozhizhi
The PCI Local bus concept was developed to break the PC data I/O bottleneck and clearly opens the door to increasing system speed and expansion capabilities. The PCI Local bus moves high speed peripherals from the I/O bus and places them closer to the system’s processor bus, providing faster data transfers between the processor and peripherals. The PCI Local bus also addresses the industry’s need for a bus standard which is not directly dependent on the speed, size and type of system processor. It represents the first microprocessor independent bus offering performance more than adequate for the most demanding applications such as full-motion video.
标签： bottleneck developed the concept
上传时间： 2014-12-03
上传用户：ikemada
The PCI Local bus concept was developed to break the PC data I/O bottleneck and clearly opens the door to increasing system speed and expansion capabilities. The PCI Local bus moves high speed peripherals from the I/O bus and places them closer to the system’s processor bus, providing faster data transfers between the processor and peripherals. The PCI Local bus also addresses the industry’s need for a bus standard which is not directly dependent on the speed, size and type of system processor. It represents the first microprocessor independent bus offering performance more than adequate for the most demanding applications such as full-motion video. Hardware reference
标签： bottleneck developed the concept
上传时间： 2016-03-18
上传用户：极客
The PCI Local bus concept was developed to break the PC data I/O bottleneck and clearly opens the door to increasing system speed and expansion capabilities. The PCI Local bus moves high speed peripherals from the I/O bus and places them closer to the system’s processor bus, providing faster data transfers between the processor and peripherals. The PCI Local bus also addresses the industry’s need for a bus standard which is not directly dependent on the speed, size and type of system processor. It represents the first microprocessor independent bus offering performance more than adequate for the most demanding applications such as full-motion video. User Manual
标签： bottleneck developed the concept
上传时间： 2014-01-15
上传用户：努力努力再努力
短消息代码~！ 短消息代码~！ PC发送sms
上传时间： 2014-01-12
上传用户：sevenbestfei
基于视频的智能交通监控系统技术研究 [学位论文]针对基于pc的监控系统的缺陷，论文以提高性能的DSPs作为系统核心处理器，可以有效的克服基于PC的监控系统的不足，提高系统的稳定性和实时性。
上传时间： 2016-03-21
上传用户：youmo81
