The Chameleon64 is a very powerful and versatile cartridge: Although its initially a C64 cartridge, it also runs standalone and allows to emulate different machines by replacing the FPGA programming. Today I use mine mainly as a HW Amiga emulator with the brilliant Minimig FPGA implementation.
If you look at the HW of the Chameleon you’ll see the clockport connector on the lower right. While this connection was initially devised for the Amigas to add a Real Time Clock (hence the name), it soon became a versatile 8 Bit interface for lots of different HW extensions. It was even “ported” back to the C64 to use some of the Amiga extension cards there as well… That’s the reason why you find it on your Chameleon…
Hmm, I thought… now with an Amiga running on the cartridge why not close the circle and make the clockport accessible to the Minimig, too?
A new project was born: TC64 Minimig-cp (cp for clockport!):