INT 15 - Advanced Power Management v1.0+ - SYSTEM STAND-BY                      
	AX = 5307h
	CX = 0001h
	BX = 0001h (device ID for all power-managed devices)
Return: CF clear
Notes:	puts the entire system into stand-by mode; normally called in response
	  to a System Stand-by 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 stand-by state is typically exited on an interrupt
SeeAlso: AX=4280h,AX=5307h/CX=0002h"SUSPEND",AX=5307h/CX=0003h,AX=530Bh