BITS 16 
; THIS LIBARY IS IN REALLY BAD SHAPE
; Power_off is okay to use

power_check:
  ;perform an installation check
  mov ah,53h            ;this is an APM command
  mov al,00h            ;installation check command
  xor bx,bx             ;device id (0 = APM BIOS)
  int 15h               ;call the BIOS function through interrupt 15h
  call printCRLF
  call dumpax
  ;jc APM_error          ;if the carry flag is set there was an error
                        ;the function was successful
                        ;AX = APM version number
                            ;AH = Major revision number (in BCD format)
                            ;AL = Minor revision number (also BCD format)
                        ;BX = ASCII characters "P" (in BH) and "M" (in BL)
                        ;CX = APM flags (see the official documentation for more details)
  ret

power_enable:
  ;Enable power management for all devices
  mov ah,53h              ;this is an APM command
  mov al,08h              ;Change the state of power management...
  mov bx,0001h            ;...on all devices to...
  mov cx,0001h            ;...power management on.
  int 15h                 ;call the BIOS function through interrupt 15h
  ;jc APM_error            ;if the carry flag is set there was an error
  ret

power_off:
  ;actual shutdown command
  mov ah, 0x53
  mov al, 0x07
  mov bx, 0x1
  mov cx, 0x3
  int 0x15
  ret