I was wondering if it was possible to build an REU that would go into the memory slot of an A500.
It could have an 8 meg ram and work like an the C64 version.
It would also need to use some chip ram to work.
That how "Expanded" vs "Extended" memory worked on the DOS PC.
It was really only good for certain programs that knew how to take advantage of that type of RAM.
Its an Amiga, so you can take total control of the system and utilize that RAM for something, but it would take a major hack job to get the OS to understand how to use it as memory heap.