[no subject]

The advantage of your first solution (move the entire HGR screen) is that i=
t will always take the same number of cycles. Mine is probably faster when =
few things change. Depending on the number of tiles to refresh, you may add=
 a tempo to have the same game experience with a constant "frame rate" or p=
lay music as with Force 7 ;-)

And to answer to your question: shall I move one byte (7px) or two bytes (1=
4px), display your tiles by column and not by row. When you scroll, scroll =
one byte to the left and add one column (from two) of your tiles on the rig=
htmost column.

Antoine