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a guest Oct 21st, 2019 70 Never
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  1. ; For people who are trying to get started with developing a bootloader
  2. ; Assemble with nasm
  3.  
  4. org 0x7C00
  5. bits 16
  6.  
  7. start:  mov si, message         ; Put addr of 'message' into si
  8.         mov ah, 0x0E            ; 16-bit interrupt for printing
  9.         mov bx, 0x0000          ; Ensure page and color (not used in text modes) are 0
  10. .loop:  lodsb                   ; Load byte at si into al and increment si
  11.         or al, al               ; al | al
  12.         jz .exit                ; If al == 0, the zero flag is set, and string ended
  13.         int 10h                 ; Print char
  14.         jmp .loop               ; Repeat
  15. .exit:  hlt                     ; If you can, halt
  16.         jmp .exit               ; If not, loop forever
  17. msg:    db `Hello World`,0      ; Message
  18.  
  19. times 510 - ($ - $$) db 0
  20. dw 0xAA55
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