Date   : Tue, 21 Aug 2007 07:54:31 +0100
From   : info@... (Sprow)
Subject: Sprites....

In article <003201c7e3bf$66500f50$32f02df0$@com.au>,
   Peter Craven <cjl_craves@...> wrote:

> Was there ever written a utility/ program to allow Sprites to be used on
> M128. I thought the PLOT commands that provide 'COPY' & 'MOVE' of screen
> parts was too slow?? Plus it really does not have interrupt driven movement
> as other microcomputers had (I think Commodore did).

The problem with the MOS copy/move is that they're generic copy/move. So
here's no way for it to predict in advance if you're about to move 5 pixels
or 307200 pixels, and I doubt it can shift that much data during the flyback
period.

Better to use a second bank of screen memory and toggle between them, then
you've got 20ms to do the move,
Sprow.