Check keyboard scancodes

BITS 16

jmp 7c0h: __START__

__START__:

  mov ax, cs
  mov ss, ax
  xor sp, sp
  mov ds, ax

  push 0b800h
  pop es
  xor di, di
  mov fs, di

  mov ax, 0003h
  int 10h

  cli
  mov ax, cs
  shl eax, 10h
  mov ax, isr09
  mov DWORD [fs:09h*4], eax
  sti

_done:
  hlt
jmp _done



 hex2s:
  push bx
  push ax

  mov bx, hex_digits
  mov ah, 0ch

  push ax

  shr al, 04h
  xlatb
  stosw

  pop ax

  and al, 0fh
  xlatb
  stosw

  pop ax
  pop bx

  ret

  hex_digits db "0123456789abcdef"


 isr09:
  in al, 60h
  call hex2s

  mov al, 20h
  out 20h, al

  iret

 TIMES 505-($-__START__) db 0
 dw 0aa55h