ISA Bus

浙江 陈剑波
1996-12-27

        一个使用最广并且最成功的I/O总线是工业标准结构(ISA)总线，也称为AT总线。ISA总线是以8MHz速度工作的16位总线。它能够在处理器和I/O设备之间每秒钟传输高达8MB的数据(1MB大约等于1000000字节)。实际执行范围在每秒4MB和8MB之间。
        由于为ISA总线设计和销售了如此多的适配卡、设备和应用程序，所以ISA总线继续流行。不需要更快吞吐能力的外设，例如调制解调器，可以使用ISA。同样，ISA最适用于单机环境的DOS应用程序用户或中等执行需求的DOS网络使用者。
        ISA Bus
        One of the most widely used and sucessful I/O busses is the Industry Standard Architccture (ISA)bus,also called the AT bus. The ISA bus is a 16-bit bus that operates at a speed of 8 MHz. It can transfer up to 8MB of data per second between the processor and an I/O device. (MB equals approximately 1000000 bytes.)Practical performance ranges between 4MB to 8MB per second.
        The ISA bus continues to be popular because so many adapters, devices, and applications have been designed and marketed for it. Peripherals that don't require faster throughput, such as fax modems,can use ISA. Also, ISA is very adequate for users of DOS applications in a standalone environment, or for DOS network requestors with moderate performance requirements.(浙江 陈剑波)
 
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