一、概述:自从微型计算机问世以来,已提出了多种总线标准。按其用途及应用场合可分为以下三类:1.片总线(又称元件级总线),通常包括地址总线、数据总线和控制总线。2.内总线(又称系统总线或板级总线),这是微机系统特有的总线。它主要用于连接各种具有独立功能的插件板。内总线有统一标准,对每块插件板的引脚数和各引脚的信号均有严格规定,所以插座之间具 I. Overview: Since the advent of microcomputers, a variety of bus standards have been proposed. According to their use and application can be divided into the following three categories: 1. Chip bus (also known as component-level bus), usually including the address bus, data bus and control bus. 2. The internal bus (also known as system bus or board level bus), which is a microcomputer system-specific bus. It is mainly used to connect various plug-ins with independent functions. There is a unified standard within the bus, the number of pins for each board and the pins of the signal are strictly regulated, so the socket with