I should also add that the A1200 isn't compatible with a lot of A500 games!!! Many will fail when loaded from floppy. You have do downgrade it for better compatibility (search for "relokick").
The best way to play games on an A1200 is WHDload, but you will need more than 2MB memory for many titles:
http://guildserver.co.uk/kgwhd/
many useful links here:
http://wiki.abime.net/
This might come in useful as well since you have a Workbench ADF:
http://classicwb.abime.net/