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DOS 功能调用
2022-07-06 09:29:00 【My71】
[原文链接 —— SevenOne’Blog](http://www.my71.fun/2022/04/27/汇编语言/11-DOS 功能调用/)
DOS 功能调用
- 想实现输出输出可以借助 BIOS 功能调用和 DOS 功能调用。
- 在 DOS 中有很多功能,每个功能用唯一的功能号作区分,相当于 id。
- 功能号只能存到 AH 中。
指令集
01H
功能:输入一个字符后立即显示出来。
输入的数据存到了 AL 中。
mov ah,01h int 21h
02H
功能:输出一个字符。
使用前需要将输出的字符或字符的 16 进制 ASCII 码存到 DL 中。
mov dl,'A' mov ah,02h int 21h
07H
功能:输入一个字符后无任何显示,继续执行下面的程序。
同 01H,输入的数据存到了 AL 中。
mov ah,07h int 21h
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