《Operating System Concepts》阅读笔记：p9-p12

《Operating System Concepts》学习第 3 天，p9-p12 总结，总计 4 页。

一、技术总结

1.interrupt

interrupt具有优先级(priority)。

2.storage

指令只能在 memory 上执行，所以要执行程序，那么就要加载到内存上。

(1)RAM

General-purpose computers run most of their programs from rewritable memory, called main memory (also called random-access memory, or RAM). Main memory commonly is implemented in a semiconductor technology called dynamic random-access memory (DRAM)。

main memory也称为 RAM， primary memory， 关于 memory 的术语非常多，每次看到就头疼，需要根据上下文去理解具体指的是什么，这里记一下。

(2)ROM

Instead, for this and some other purposes, the computer uses electrically erasable programmable read-only memory (EEPROM) and other forms of firmware—storage that is infrequently written to and is nonvolatile.

二、英语总结(生词：3)