Int 49 Fn 06  - Ti Professional Pc - Crt - Scroll Up/copy Window           [V]

   AH = 06h
   AL = source blanking
       00h blank source region (move/scroll)
       nonzero do not blank source region (copy)
   DH,DL = source start column,row
   BH,BL = destination start column,row
   CH = width of region to move/copy
   CL = height of region to move/copy

Return: nothing

Notes: AH=00h,04h,05h,0Bh,0Ch,0Dh,0Fh are documented as NOPs
   the specified region may be wider than the screen, but reliable
     operation then requires that the height be exactly one row

See Also: AH=01h,AH=02h,AH=07h,AH=13h,AH=14h