本文的内容是从概念上介绍USB软驱固件设计的各个步骤，这些步骤中的重点在于USB设备的枚举，Mass Storage CBI协议/UFI命令的处理以及本设计中所采用的DataFlash AT45DB161B的读写。-the content of the paper is to introduce the concept of USB floppy drive firmware design of the various steps These steps will focus on the US

对于MSC(即SCSI)设备枚举相关的描述符和 Bulk-Only传输协议有了很详细的介绍。-For the MSC (ie, SCSI) device enumeration associated descr iptor and Bulk-Only Transport Protocol with a very detailed descr iption.

PCI配置空间的详细解释，PCI设备枚举示例，PCI菜鸟必备(PCI configuration space for detailed explanation, PCI device enumeration example, PCI rookie necessary)