> > What about in Linux or UNIX??
> 
> JV>It is best to use libc calls- everything uses libc and you should too.
> JV>Two simple examples:
> 
> What does puts do exactly.
Those are ANSI C functions, write a little C program with the -S
switch in gcc and it will generate assembly source to look at.
The C manuals will explain, the -S will show. (gcc -S source.c)
Here's a sample calling INT 80, but I *really* have very few clues
about this.
;nasm -f elf int80.asm -o int80.o
;then either:
; gcc int80.o -o int80
; ld -e main -o int80 int80.o
section .text 
global main, msg
main:
        mov edx, 07h            ; write 0x7 characters 
        mov ecx, msg            ; address of msg  
        mov ebx, 0h             ; write to stdout
        mov eax, 4h             ; syscall write
        int 80h                 ; trap
        mov ebx, 0              ; zero the exit value
        mov eax, 1h             ; syscall exit
        int 80h                 ; trap
        ret                     ; never reached.
    
msg:    
        db 'Hello!', 0Ah 
               
   
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