boot/x86/loader.s

   1 bits 16
   2 cpu 686
   3 org 0x0
   4
   5 %macro print 1
   6
   7         mov si, %1
   8         call print_str
   9
  10 %endmacro
  11
  12 _start:
  13         print string
  14         hlt
  15         jmp $-1
  16
  17 print_str:
  18         pusha
  19         mov ah, 0xe
  20         xor bh, bh
  21 .loop:
  22         lodsb
  23         cmp al, 0
  24         je .done
  25         int 0x10
  26         jmp .loop
  27 .done:
  28         popa
  29         ret
  30
  31 string: db "Hello from LOADER.BIN!", 0xd, 0xa, 0