INT 15h,  42h (66)       Request System Power Off                 Convertible

The system is powered off. The next time the system is turned on,
control can be returned to the instruction following this power-off
call. (PC Convertible only.)

On entry:      AH         42h
AL         Event type code
0 - Use Profile for Resume mode state
1 - Resume mode no matter what

Returns:       Carry      Set if error, else cleared
AH         Modified

                                                                          

Control is returned immediately if this service is not available. If
it is available, then power is turned off. The next time the system is
turned on, if the event type code (AL) is 1 or the System Profile (see
Service 40h) has warm start mode set, the machine will start right
where it left off, executing the program that generated this service.

Notes:         This service is available only for the PC
Convertible.

Before the system is powered down, the diskette
motors are turned off.

See also: INT 15h, 40h

INT 15h, 42h (66) Request System Power Off Convertible