ISO Moto Exorciser and EXORterm docs

[Al Kossow]

I spent some time this weekend documenting the hardware of these
and dumping some more MDOS floppies.

We had one copy of the MDOS manual which replaced the poor copy I
had in bitsavers.org/components/motorola/6800/exorciser.

It would be nice to find more/better docs, esp docs on the EXORterm 150 
or 155. The terminal has a keytronics kb .ca 1978, of course all the
foam was crumbled.