how to implement int 27h or the function 31h of int 21h?

[dafengqixi]

hello everyone,
         I wonder how to implement  int 27h or the function 31h of int 21h,or you can tell me how they work.if you have the source codes of the functions ,please paste them or you can mail them to me.thank you.

[Geek-9pm]

You mean the interrupt codes used in MS-DOS.
http://spike.scu.edu.au/~barry/interrupts.html
Are you writing in Assembly for a DOS? Which DOS?
And are you wanting to use BIOS interrupts?
http://en.wikipedia.org/wiki/BIOS_interrupt_call
The above link gives you the some information yhou need and refers to other placews for more information.

INT 27h
The recommended call instead of this one is INT 21h function 31h,

http://www.delorie.com/djgpp/doc/dpmi/api/310c01.html

Hope you know what your are doing.
This is like going into a very high class restaurant and you don't see the prices. If you have to ask you can't afford it. Before you try and use these low level functions your should already have a full understanding of what they do. Otherwise you computer will crash and burn.

[dafengqixi]

it sounds a little crazy,but I will try.Thank you.

[Geek-9pm]

Well, here are some samples written in C.
http://www.freshersworld.com/Directory/codes.asp?cat=C&subcat=Terminate%20but%20Stay%20Resident%20%28TSR%29