Also, are the
cartridges that worked
with the Coco1 compatible with the later models? Thanks.
Most of them are. A few that used the +12V supply, such as the first
generation floppy controller, are not. Those can be used if you plug them
into a Multipack, since it provides the +12V.
I did some sort of hack on the floppy controller (it involved soldering a
wire from the power supply to one of the contacts on the controller card).
I can dig it out if anyone needs it . . .