INT 15 - Advanced Power Management Specification - SUSPEND SYSTEM
        AX = 5307h
        BX = 0001h
        CX = 0002h
Return: after system is resumed
        CF clear
Notes:  puts the entire system into a low-power suspended state; normally
          called in response to a Suspend System Request notification after
          any necessary processing, but may also be invoked at the caller's
          discretion
        should not be called from within a hardware interrupt handler to avoid
          reentrance problems
        the caller may need to update its date and time values because the
          system could have been suspended for a long period of time
SeeAlso: AX=530Bh