INT 62 u - FGDRIVER v4.02 - "FG_POINTX" - DISPLAY A PIXEL IN XOR MODE
	AX = 0090h
	BX = column
	CX = row
Notes:	the FGDRIVER functions are rearranged with each major release, but
	  their parameters do not change (see #03474 at AX=0000h)
	This call is ignored in text modes
SeeAlso: AX=004Dh,AX=008Fh