Int 62 Fn 00A5  u - Fgdriver V4.02 - "fg_scroll" - Vertically Scroll Scre  [V]

   AX = 00A5h
   BX = left edge column
   CX = right edge column
   DX = top edge row
   SI = bottom edge row
   DI = number of pixels by which to scroll (positive scrolls up,
         negative scrolls down)
   ES = type of scroll
       0000h circular (rows scrolled off are copied to vacated rows)
       else vacated rows are filled with the current color

Notes: the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145 at AX=0000h)
   In graphics modes, the left and right edges are adjusted to byte
     boundaries if necessary
   Circular scrolling uses part of the hidden page as a workspace

See Also: AX=0088h,AX=00B2h