INT 62 u - FGDRIVER v4.02 - "FG_GETMODE" - GET CURRENT VIDEO MODE NUMBER
	AX = 004Bh
	ES:BX -> WORD ???
Return: AX = current video mode number
Note:	the FGDRIVER functions are rearranged with each major release, but
	  their parameters do not change (see #03474 at AX=0000h)
SeeAlso: AX=00B0h