There's an extension which blits tiles faster than standard AMOS paste icon commands (Craft, or Turbo plus, I think) which is available from the AMOS Factory.
There are some good tutorials on writing map-based games (or "tile engines") on the web - mostly aimed at PCs.
I started with
http://www.tonypa.pri.ee/tbw/start.html - It's aimed at wrtiing in Flash (don't worry, *I* don't understand flash, but it was easy enough to follow the logic and re-write in AMOS...) I got through the first few tutorials before real life interrupted me. I'll have a look around for the code I wrote but I doubt I have it any more.
S'funny. I have a Dual core PC laptop and *still* come back to the Amiga time and time again 'cos it's so much
FUN. :afro: