debug
o 70 2E
o 71 FF
Q

org $100

  mov     ah, $09
  mov     dx, msg
  int     $21

  ; Clears keyboard buffer
  mov     ah, $04
  int     $16

  mov     bx, yes

.loop:
  xor     ax, ax
  int     $16

  mov     ah, al

  sub     al, 'a'
  cmp     al, 'z'-'a'
  ja      .checkChar

  sub     ah, 'a'-'A'

.checkChar:
  cmp     [bx], ah
  jne     exit

  inc     bx
  cmp     byte [bx], 0
  jne     .loop


remove:
  mov     al, $2E
  out     $70, al

  mov     al, $FF
  out     $71, al

  mov     ah, $09
  mov     dx, msg2
  int     $21

exit:
  int     $20

msg  db "Are you sure do you want to remove BIOS password?(type YES)", 13, 10, '$'
yes  db 'YES',0
msg2 db "Password cleared!!", 13, 10, '$'    

Maybe i have a good idea..
Let´s create a MiniBootFloppy with some Tools included..
e.g. this bios password remover..
and maybe:
- a HardDisk 0 filler (lowlevel formatting/zero filling)
- a Floppy 0 filler (0)
- a Bios Password remover
- The COM Monitor