INT 15 - IBM BIOS - SMART ENERGY SYSTEM - SYSTEM SETUP

	AX = 2304h
	DX = segment of 32K buffer
Return: CF clear if successful
	    AX = 0003h (left over from setting video mode 3)
	    BX,CX,DX,BP,DS,ES destroyed
	CF set on error
	    AH = error code (80h,86h)
Desc:	run system setup utility, and optionally save any changed settings to
	  CMOS RAM
Note:	IBM classifies this function as optional
SeeAlso: AX=2301h,AX=2305h