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[Other] 221东南大学 DL : 0: 首先，分别对8255、8253进行初始化，设置8255为A口、C口输出，设置8253的计数器0为工作模式3；其次，设置IRQ7的中断矢量，使得有IRQ7中断时调用SERVER；再次，调用INIT对计数值初始化；最后，主程序循环等待中断，开始秒表的计时。 2、 INIT子程序-First, the 8255,8253 initialization, set for the 8255 A-C mouth output, set 8253 as the Counter mode 0 3; Second, set up the interruption vector there, make it there interruption call SERVER; Again, call curl_setopt early to count before; Finally, the cycle of waiting for the main program interruption began stopwatch time. 2, curl_setopt Subroutine
Date : 2008-10-13 Size : 15.01kb User : 孙媳妇
[Other] piano3 DL : 0: 通过d/a转换器产生模拟信号，使用pc机作为简易电子琴。使计算机数字键1、2、3、4、5、6、7作为电子琴键。硬件8253，8255，dac0632-through d / a converter produce analog signals, the use of PCs as simple flower. The computer keys, as an electronic Qinjian. Hardware 8253,8255, dac0632
Date : 2008-10-13 Size : 940byte User : 汪江
[Other] yfm198209 DL : 0: 汇编语言实验，利用PC机内部的8255来完成-assembly language experiments, the use of PCs within the 8255 to complete
Date : 2008-10-13 Size : 2.26kb User : 严炎