INT 10 - HP Vectra EX-BIOS - SET MONITOR INFO

	AX = 6F02h
	BL = new value for extended control register (see #00190)
Return: AX,BL destroyed
Notes:	this function is only valid when an HP MultiMode Video Display Adapter
	  is installed
	the Extended Control register is at I/O address 3DDh
SeeAlso: AX=6F01h,AX=6F03h