概述
微机的内存有常规内存、保留内存、高端内存、扩展内存和扩充内存。
其五种类型的关系图见动画。
常规内存
1.中断向量区：地址范围为00-3FFH，占1KB，又称中断向量表区。
2.BIOS数据区：范围为400～4FFH，占256个字节，供特殊程序BIOS存放数据。
3.系统数据区：地址范围为500～6FFH，占512个字节，用于操作系统存放信
息的小区域，存储在计算机启动时存放初始化信息。
4.应用内存区：范围为700～9FFFH，占638KB，通常用来运行程序的内存区。
保留内存区
640KB以上的384KB
1.视频内存区：(1)EGA/VGA图形区;(2)单色文本内存区;(3)彩色文本内存区
2.视频ROM区
3.未用区
4.扩展BIOS ROM区
5.系统BIOS ROM区
Ｆｌａｓｈ演示（如果链接无效请下载附件）
网页链接：
http://etsc.hnu.cn/jxzy/lxkj/2002/data/%CE%A2%BB%FA%D7%E9%D7%B0%D3%EB%C8%ED%CE%AC%BB%A4/c1/314.html
动画链接：
http://etsc.hnu.cn/jxzy/lxkj/2002/data/%CE%A2%BB%FA%D7%E9%D7%B0%D3%EB%C8%ED%CE%AC%BB%A4/flash/wznct.swf
Last edited by willsort on 2005-12-6 at 14:13 ]
### Overview
The memory of a microcomputer includes conventional memory, reserved memory, upper memory, extended memory, and expanded memory.
A relationship diagram of these five types is shown in the animation.
### Conventional Memory
1. Interrupt vector area: The address range is 00 - 3FFH, occupying 1KB, also known as the interrupt vector table area.
2. BIOS data area: The range is 400 - 4FFH, occupying 256 bytes, for special programs BIOS to store data.
3. System data area: The address range is 500 - 6FFH, occupying 512 bytes, a small area for the operating system to store information, storing initialization information when the computer starts.
4. Application memory area: The range is 700 - 9FFFH, occupying 638KB, usually the memory area for running programs.
### Reserved Memory Area
384KB above 640KB
1. Video memory area: (1) EGA/VGA graphics area; (2) Monochrome text memory area; (3) Color text memory area
2. Video ROM area
3. Unused area
4. Extended BIOS ROM area
5. System BIOS ROM area
Flash demonstration (if the link is invalid, please download the attachment)
Web page link:
http://etsc.hnu.cn/jxzy/lxkj/2002/data/%CE%A2%BB%FA%D7%E9%D7%B0%D3%EB%C8%ED%CE%AC%BB%A4/c1/314.html
Animation link:
http://etsc.hnu.cn/jxzy/lxkj/2002/data/%CE%A2%BB%FA%D7%E9%D7%B0%D3%EB%C8%ED%CE%AC%BB%A4/flash/wznct.swf
Last edited by willsort on 2005-12-6 at 14:13 ]
