Hi.
I created a Header.inc file, which has below content

;;*********************************
PrintChar:
mov ah, 2
int 21
ret
;;*********************************

and an asm file that has below content

;;*********************************
org 100h
include 'Header.inc'

mov dl, 'A'
jmp PrintChar
;;*********************************

but when I run the com file it does not print 'A' on the screen.
Instead it prints 'P' on the screen.
What's the problem?
Can I create a procedure without using windows proc macros?

Thanks

'Include' will include the external file just as if you had typed it directly

there are 2 files. first, header.inc and the second, project.asm file.
I don't know why it does not work.
Actually I want to create a function that prints a character and be in another file.

majidkamali1370: Look at the code I posted above. That is exactly what fasm assembles.

If you need me to give you a direct answer then do this:

Thanks. It works. but in big projects, should I include all header files at the end?

You need to understand what include does. It inserts the text of the included file directly at the place of the include directive.

This would also work:

You need CALL - not a JMP.

Also, JMP START: may trigger anti-virus.
You can include all functions at the end of COM file:

depending on what is in your header, you can also do that:


it will let you separate system specific code and applications codes.

Header.inc