采用FPGA实现了两套IDE接口功能，设计支持PIO和Ultra DMA传输模式，文章侧重于介绍用FPGA实现IDE接口协议的具体方法。-a card used to control ide hardware base FPGA

上篇是对ALTERA公司SOPC中的PIO核进行了详尽的介绍，包括寄存器、添加方法及常用的操作。-Part is the ALTERA' s SOPC in the PIO nuclear carried out a detailed introduction, including the register, adding methods and commonly used operations.

并行输入/输出（PIO）的Avalon 接口设计-The parallel input/output (PIO) core with Avalon interface