> Is there a link to some Deco Cassette background and information (apart from wiki and > atariproto)? Last game I tried that was labelled DECO it wanted me to wait 90 seconds > for something to happen.
Hold down the fast forward key in MAME until the 90 seconds is up. It's invaluable for games that load off tapes/disks/CDs (or program flash ROMs like Seibu SPI/Konami 573/CPS-3/etc)