Datapoint 1100, 2200 and 5500 processors

Hello. I recently received one book named "A guide for operating Datapoint Equipment". It is 88 pages long and describes very good all the processors and peripherals that could be attached to one of these systems. In another place in the Internet mentions that the cassette operating system of these machines was the CTOS (yes, the processor appeared to have a couple of cassette units and load the OS from one of it). Do somebody has software for this machine ? Is it possible to get something for one repository or download place ? Do it exists some documentation scanned or available ? I should like to know experiences of everyone with this machine if this can be possible. And finally... Somebody knows a place where one of these systems would be working or at least operative ? Thanks and Greetings SP