> There are two sizes, the mini cassettes are the most common and the regular sized > ones are only for the older games. I think those old games were re-released on the > mini size as well. > > The dongles are filled with epoxy to keep people from looking at the circuit board. > Once it's removed there's a bunch of TTL chips (buffers, counters, logic gates) and > the odd PROM or EPROM. Some dongles have internal jumpers that were set up prior to > being encased in epoxy. That's about it.
Thank you for the information!. I assume there was some sort of upgrade kit available for those with the larger/older tape drives at some point?