Int 62 Fn 003D  u - Fgdriver V3.03 - "fg_getmaxx" - Get Maximum Column In  [V]

   AX = 003Dh

Return: AX = maximum X coordinate in screen space
       (or character space if in text mode)

Note:  For FGDRIVER v1.10, this function was "FG_SETPAGE" (see AX=0095h);
      "FG_GETMAXX" was AX=000Ah

See Also: AX=003Eh,AX=00A1h