INT 10 - VESA - VIDEO CURSOR INTERFACE REQUEST

	AX = 4F4Dh
	BX = number of bytes available for VCI use
	DS:0000h -> buffer for VCI
	ES:DI -> VCI driver callback function
Return: AL = 4Fh if supported
	    AH = status
		00h successful
		    BX = number of bytes used by VCI
		    ES:DI -> VCI request handler
		01h failed
Desc:	allow the VESA BIOS Extensions to cooperate with a pointing-device
	  (typically mouse) driver
SeeAlso: AX=4F12h