How to write hello world in assembler under Windows?

Question

I wanted to write something basic in assembly under Windows, I\'m using NASM, but I can\'t get anything working.

How to write and compile hello world without the he

Answer 1

NASM examples.

Calling libc stdio printf, implementing int main(){ return printf(message); }

; ----------------------------------------------------------------------------
; helloworld.asm
;
; This is a Win32 console program that writes "Hello, World" on one line and
; then exits.  It needs to be linked with a C library.
; ----------------------------------------------------------------------------

    global  _main
    extern  _printf

    section .text
_main:
    push    message
    call    _printf
    add     esp, 4
    ret
message:
    db  'Hello, World', 10, 0

Then run

nasm -fwin32 helloworld.asm
gcc helloworld.obj
a

---

There's also The Clueless Newbies Guide to Hello World in Nasm without the use of a C library. Then the code would look like this.

16-bit code with MS-DOS system calls: works in DOS emulators or in 32-bit Windows with NTVDM support. Can't be run "directly" (transparently) under any 64-bit Windows, because an x86-64 kernel can't use vm86 mode.

org 100h
mov dx,msg
mov ah,9
int 21h
mov ah,4Ch
int 21h
msg db 'Hello, World!',0Dh,0Ah,'$'

Build this into a .com executable so it will be loaded at cs:100h with all segment registers equal to each other (tiny memory model).

Good luck.