INT 62 u - FGDRIVER v3.03 - "FG_GETVPAGE" - GET VISIBLE VIDEO PAGE NUMBER
        AX = 0043h
Return: AX = visible video page (0000h-003Fh)
Note:   For FGDRIVER v1.10, this function was "FG_FREEPAGE" (see AX=002Eh);
          "FG_GETVPAGE" was AX=003Eh
SeeAlso: AX=0037h,AX=0040h,AX=0098h

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