Challenger C4P information wanted.

[keith at saracom.com]

Hello,

A friend gave me his first computer to go in my 
collection.  Its a Challenger C4P.  I do have the
original manuals etc.  And of course my friend for
information.

What I am looking for however is additional information,
websites etc devoted to it.  I have the cassette based
version.  The first question would be details on the
floppy disk version.  IE can I upgrade mine.  If not,
sources for programs for the cassette based unit.

For one thing, I would like a terminal emulation
program for it.

Thanks
Max