Int 62 Fn 0049  u - Fgdriver V4.02 - "fg_getmaxx" - Get Maximum Column In  [V]

   AX = 0049h

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

Note:  the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145 at AX=0000h)

See Also: AX=004Ah,AX=00C1h