Toaster 2000 (original toaster) is a Video Slot card
Toaster 4000 (AGA toaster) runs in either the video slot or the extended video slot (You need to change jumpers to correct configuration)
Flyer is a Zorro-II card.
Toaster 1.0 runs on a stock 2000, 2.0 would too, though pretty slow.
The video slot is basically the 23 pin video port, the parallel port, audio ports and some power pins. The toaster loads video frames and other items by some very clever code using this interface.
-Tig
