This paper describes a new way called, pseudo DMA operation to design floppy disk and hard disk adaptor on STD BUS. therefore it solves the outstanding problems resulting from that STD BUS does not support DMA opera-tion.

• 介绍了一种采用伪DMA操作的新技术在STD总线上设计软盘适配器的方法,从而也解决了由于sTD总线不支持DMA操作而引出的难题;