INT 15 - SYSTEM - REQUEST POWER OFF (CONVERTIBLE,HP 95LX)
AH = 42h
AL = 00h to use system profile
01h to force suspend regardless of system profile
Note:   the HP 95LX apparently suspends regardless of the value in AL; on
power-up, execution will resume following the instruction calling
this function

See also: 1544

1542 - SYSTEM - REQUEST POWER OFF (CONVERTIBLE,HP 95LX)