I've successfully installed a 6809 in a previously
6502-based
machine: the Compukit UK101. I had to write new EPROM-based
firmware for it, of course. As far as the bus and I/O devices
are concerned, it Just Works. Even the pinout is similar enough
that the socket adaptor is easy to build.
I just had an evil thought -- a 6502-based CoCo. I wonder how well
that would work.
--
------------------------------------ personal:
http://www.cameronkaiser.com/ --
Cameron Kaiser * Floodgap Systems *
www.floodgap.com * ckaiser at
floodgap.com
-- Computers are like air conditioners. They stop working if you open windows.