Memodyne M-80 'Cassette Computer'

Hi guys, I have a Memodyne M80 'Cassette Computer'. From what I've gathered, it's basically just a digital tape drive (it has about 5 boards in it, including a Z80 board with an emprom marked '1200 baud', although from one sales doc it looks like it could have been built out to be a 'general purpose' Z80 computer. I've read these were used for a variety of purposes including SWTPC terminals like mine. What I cannot find though is any actual instruction manuals, etc that explain how to use it. I did find one PDF online as part of a university paper that described another Memodyne's system a little bit. Wondering if anyone has any info out there. It's a neat little box to look at, anyway. Many thanks, esp. to those like Chuck who were able to offer some useful advice thus far on it! :) Brad