Hello Alex,
thank you for your reply.
But this reply leaves me a bit puzzled...
The part where you say "
.......because you didn't have an accelerator."
But that 1-inch wide gizmo that I was using
IS an accelerator.
In my search for details , I found it on a Web-site called the
Big Book of Amiga Hardware.
And in the Navigation column, I clicked on
A500 Accelerators
and it was the last item on the bottom of page 2. - Here's a picture: