mirror of
https://github.com/corkami/pics
synced 2026-06-08 13:35:59 +00:00
Ange Albertini
31 lines
710 B
NASM
31 lines
710 B
NASM
; a simple hello world .COM
|
|
|
|
; compile with: yasm -o simple.com simple.asm
|
|
|
|
; Ange Albertini, BSD Licence, 2013
|
|
|
|
org 100h ; standard loaded address
|
|
bits 16 ; ouch :p
|
|
|
|
DISPLAY_STRING equ 9h
|
|
TERMINATE_WITH_RETURN_CODE equ 4ch
|
|
|
|
MAIN_DOS_API equ 21h
|
|
|
|
; in a .COM file, DATA is with mixed with CODE
|
|
; not strictly required, as by default, ds=cs on initialization, but safer
|
|
push cs ; = mov ds, cs
|
|
pop ds
|
|
|
|
; print("Hello World!\r\n\r")
|
|
mov dx, msg
|
|
mov ah, DISPLAY_STRING
|
|
int MAIN_DOS_API
|
|
|
|
; return 1;
|
|
ERRORCODE equ 1
|
|
mov ax, (TERMINATE_WITH_RETURN_CODE << 8) | ERRORCODE
|
|
int MAIN_DOS_API
|
|
|
|
msg db 'Hello World!', 0dh, 0dh, 0ah, '$' ; DOS string are $-terminated
|