What they are saying is that the only way to use the ISA slots in a big box Amiga for anything other then power, you need exta hardware called Bridge boards.
There was a cheap card that had no pc emulation on that allowed isa boards to be used from amigaos. It came with drivers for the usual suspects. From memory the hardware is pretty trivial, it's basically a handful of chips so it can be autoconfig'd and some buffers so the bus can be tristated.
It should be very easy for someone to make them.
