INT 10 - VIDEO - Paradise VGA, AT&T VDC600 - LOCK CURRENT MODE

	AX = 007Fh
	BH = 03h
Return: AL = 7Fh if successful (AT&T VDC600)
	BH = status (Paradise/Dell)
	    00h invalid function
	    7Fh successful
Desc:	allows current mode (VGA or non-VGA) to survive re-boot
SeeAlso: AX=007Eh,AX=007Fh/BH=04h,AX=007Fh/BH=06h,AH=FFh"Oak"