ISA-USB can be used for DOS-compatible PC system, IPC 8086 or microcontroller, through its U disk or mobile hard disk read and write, you can use its DOS device driver, U disk to emulate a hard disk, the increase in the DOS a logical drive (usually D drive), use the method is similar to an ordinary hard disk and RAM memory and electronic disk, the method also supports hot-plug U disk live and more convenient to exchange data.