PET and Magic Sac+

I found two interesting items today. One is a PET 2001-8. It has the regular keyboard. Inside was an "expandaram" board that added additional RAM and some peripheral slots for the PET. The cards plugged in looked a lot like Apple ][ cards in their form factor but I assume this is some proprietary bus. Anyone have info on this? Also, found a little module that apparently plugs somewhere into an Atari ST. It's called the Magic Sac+ and on it it says "Turns your Atari into a Mac". Anyone ever use one of these? Where on the ST would this plug in to? Or is it for the Mega ST perhaps? Sellam Ismail Vintage Computer Festival ------------------------------------------------------------------------------ International Man of Intrigue and Danger http://www.vintage.org * Old computing resources for business and academia at www.VintageTech.com *