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8086 内存
2022-07-06 09:30:00 【My71】
CPU
- X86:8086
- ARM
内存
容量
- 基本单位:B(字节)所有描述容量的基本单位都是 B。
- 1B = 8 bit
- 最小的存储单位是:B
- 最小的存储单元是:b
内存格(存储单元)
- 一个存储单位 1B = 8b,无符号存储范围是 0 ~255,有符号存储范围 -128 ~127。
- 两个存储单元 2B = 16b,无符号…… 0 ~ 65535,有符号…… -32768 ~ 32767。
地址标识
- 用一个十六进制数标识一个内存地址。
- 地址示意图
I/O 接口
- I/O 接口相当于 CPU 与外设之前的桥,负责将来自 CPU 和外设的数据进行缓存在交给对方。
- I/O 接口内也有存储空间,称为 I/O 端口。 I/O 端口也是通过地址标识的。
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