Int 62 Fn 00B0  u - Fgdriver V3.03 - "fg_xalpha" - Convert Screen Column   [V]

   AX = 00B0h
   BX = screen space column

Return: AX = character space column containing specified coordinate

Note:  For FGDRIVER v1.10, this function was unused; "FG_XALPHA" was AX=000Ch

See Also: AX=00B1h,AX=00B2h