INT 15 - Advanced Power Management Specification - RESTORE POWER-ON DEFAULTS
AX = 5309h
BX = FFFFh
Return: CF clear if successful
CF set on error
AH = error code (09h) (see AX=5300h)
Note:   should not be called from within a hardware interrupt handler to avoid
reentrance problems

See also: 155308

155309BXFFFF - Advanced Power Management Specification - RESTORE POWER-ON DEFAULTS