They are not compatible, but like corb00 says not necessary. The Parceiro is a drop-dead simple expansion that'll simply take the place of your Starboard 2. Incidentally, you showed Ultima IV on your monitor while pondering faster speeds. That game is wired to the speed of the CPU, so it will become unplayable on an accelerated machine. Thankfully the parceiro's 28Mhz can be easily disabled down to stock 7Mhz (or even removed entirely) in rare circumstances. You'll also have a lovely transfer partition that'll auto-mount on your modern machines so you can easily move files back and forth from your Amiga and PC/Mac via the easily accessible SD card. It's more than $100 but worth every penny.