Int 62 Fn 0028  u - Fgdriver V4.02 - "fg_erase" - Clear The Active Video   [V]

   AX = 0028h

Notes: the FGDRIVER functions are rearranged with each major release, but
     their parameters do not change (see #3145 at AX=0000h)
   This function sets each pixel to 0 in graphics modes, each character
     cell to a blank with a gray foreground attribute in text modes

See Also: AX=0029h,AX=002Bh,AX=0035h