如何获取真正中断入口地址

真正的中断地址往往在远跳转的地方，在判断哪个远跳转是真正的中断地址时，不同的中断要具体判断，如跟踪 INT 13H 时，我们知道 BIOS 的段地址一般为 E000，所以一旦判断到段地址为 E000 时，就可以把这个地址保存下来作为真正 INT 13H 地址，而跟踪 INT 21H 时，INT 21H 在 DOS 的内核中，所以要先用第一个 MCB 地址的功能取出 MCB 地址，而第一个 MCB 地址之前是系统内核区，当判断到段地址小于第一个 MCB 地址时，这个地址就是真正的 INT 21H 地址。

-How to get a real break interrupt address entry address the real places often far jump, jump far in determining which is the real interrupt address, different interrupt to be specific judgments, such as tracking INT 13H, we know that the BIOS segment address When generally E000, so once the judge to segment address is E000 when you can save this address down as a true INT 13H address, and tracking INT 21H, INT 21H in the DOS kernel, so we have to use the first MCB address Remove the MCB address functionality, and before the first MCB address system kernel area, when it is judged to be less than the first segment address MCB address, this address is the real address of INT 21H.