计算机组成原理笔记 第七章 输入输出系统

第七章 I/O系统

1. I/O系统基本概念

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DMA方式

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通道方式

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2.输入输出设备

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外存储器

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性能指标

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磁盘阵列

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3. I/O接口

3.1相关基本概念

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4 I/O方式

4.1程序查询方式

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4.2程序中断查询方式

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原子操作 ：要么一点也不做 要么全部做完

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1-6 优先级依次大

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采用两级指针

中断隐指令 不是一条具体的CPU指令 是一系列任务（由CPU自动完成）

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4.3多重中断

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4.4程序中断方式 引入中断系统

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4.5DMA方式

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块设备 块数据

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HRQ:申请总线的控制权

HLDA：总线权可以给DMA

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解决冲突的三种方式

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posted @ 2021-08-27 22:23  有空就一起吃饭吧  阅读(146)  评论(0)  编辑  收藏  举报
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