什么是INT 21h?

问题描述

受到这个问题的启发

如何强制GDB进行反汇编?

我想知道INT 21h是一个概念.现在，我对内部结构有一些非常生锈的知识，但是没有那么多细节.我记得在C64中您有常规的中断和不可屏蔽的中断，但是我的知识到此为止.你能给我一些线索吗?这是与DOS相关的策略吗?

I wondered about the INT 21h as a concept. Now, I have some very rusty knowledge of the internals, but not so many details. I remember that in C64 you had regular Interrupts and Non Maskable Interrupts, but my knowledge stops here. Could you please give me some clue ? Is it a DOS related strategy ?

推荐答案

来自此处:多功能DOS中断，用于多种功能，包括读取键盘以及写入控制台和打印机.它还使用较早的文件控制块(FCB)方法读取和写入磁盘.

From here:A multipurpose DOS interrupt used for various functions including reading the keyboard and writing to the console and printer. It was also used to read and write disks using the earlier File Control Block (FCB) method.

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