The speed of isa bus has become the bottleneck between high a / d converters where requests very high speed . isa bus interface card ca n ' t configure resource automatically . there will be no place for isa bus after the vanish of isa slots on computer mainboard Isa总线有很多优点，但在某些方面已逐渐显出不足：在一些速度要求高的场合， isa总线的速度上限已成为高速a / d转换器与主机间的瓶颈； isa总线接口卡无法实现资源的自动配置；以及计算机主板的isa插槽在逐渐的消失，所以本文又提出设计基于pci总线的接口电路。
