Woo-hoo!! I also have some OSI equipment... LOTS of it, in fact. However, it's all in Texas and I'm in Missouri. But the good part is that I also have a lot of documentation (boxes and boxes of it) and lotsa 8" floppies that presumably go to it. However... I have only tried turning on one of the 3 machines (a C4 I think?) and it's floppy drive was hosed. This is a little desktop unit that has keyboard built in and has WOODEN sides. The other two are rackmount machines that are heavy and ugly. I haven't tried turning them on because they required a dumb terminal to see any output on them. My plan is to graduate from College in a year and then after settled in a job (and home with lotsa storage space), start restoring them. And in the process make a web page consisting of all the documentation I have on the beast. However, I'm afraid that in the mean time I can't directly help you very much. I can say, however, with a good deal of certainty that the OSI C1P is _NOT_ Apple II compatable, although it probably does have a 6502 in it. As far as I know, all OSI equipment ran CP/M or a kind of multi-user CP/M. I have an OSI 8-something or another that was built to be a multiuser system (like 2-8 users) with multiple processors (mixed Z80s and 6502s). Mine only has one 6502 in it. Maybe I'll grab some of the OSI documentation when I go home to Texas at in 2 weeks and start the webpage. However, my summer project is to restore my Apple Lisa & document it. Anyone be able to help me on this? :) I guess if you have any specific questions/needs regarding the OSI stuff, I see what I can do... good luck with it! It's a nifty machine. There are a few other OSI owners on the net I've talked to, including a guy somewhere in {Washington|Oregon|California} that uses his C4P Challenger to control lights & stuff at a planetarium. The C4P was a hacker's dream because it had lotsa serial, parallel, outputs plus a "experimenter's port" which was actually like an external connection to the data bus I believe. It also had sound and color graphics that allegedly rivaled the Apple II in its time (perhaps before its time). Like I said... good luck with it! I'll help out as I can, but all my OSI stuff is in Texas. chris starling