what is the command used in assembly lang to get input frm user

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harish87

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what is the command used in the assembly language to get the input from the user.If we take two strings for eg.i am going to enter the string and i know how much characters it contains.So if i need to get the input fro the user using the assembly lang what should be done.
 
U just tell for any processor.i m dealing with systm software.

I am a student.so i need in general.Its wud be very helpful.
 
It's gonna be different for every system. I can give you this snippet of 6502 assembly, that will get a keystroke.

771 20 JSR FD35 #Built in subroutine; reads keyboard input
772 35
773 FD

That may not be helpful though; I pulled this from "Apple II Machine Language", from around 1981
 
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