Dominique, Just checking in with you on this, and to thank you for posting your interest in this system here. Do you have any updates, or perhaps new videos of it operating? Thank you! -AJ On Wed, Oct 4, 2017 at 1:33 PM, Dominique Carlier via cctalk <cctalk at classiccmp.org <mailto:cctalk at classiccmp.org>> wrote: Hi all I start here another topic concerning my research about a new Operating System for my freshly restored DCC-116 E. http://www.zeltrax.com/classiccmp_forum/second_boot/04.jpg <http://www.zeltrax.com/classiccmp_forum/second_boot/04.jpg> http://www.zeltrax.com/classiccmp_forum/second_boot/02.jpg <http://www.zeltrax.com/classiccmp_forum/second_boot/02.jpg> I originally intended to install RDOS on my machine but it seems very difficult to find the files needed to make a system installation tape. I do not know well the subject yet, I don't found clear information about the compatibility of my clone with the original RDOS from Data General. Thus, before trying the impossible, I would like to know if another OS are available for my machine ? I would like to be able to do basic things like : - Be able to manage my devices, copy files from tape to disk or vice versa. - Be able to list directories, create subdirectories. - Write and read text files that I could send on my drum printer. - Have some communication software, tty, rs-232 (for the day I find a comm board). - Some diagnostic tools to check core memory, disk, tapes. - Being able to write in a simple programming language such as BASIC would be great. - Be able to use simultaneously more than one Entrex terminal. - Maybe a database software ... ? Of course I am also interested in anything that goes beyond that. I also have more bizarre projects with this machine like generating algorithms to trace small animations on an analog oscilloscope and ... well, another chapter ;-) To recap, here the specifications of my system: Computer : D-116, clone of a DG Nova 1230 with 17 slots, also known as "Entrex 480" and "Nixdorf 620" Core memory : 64 kW Terminal : ENTREX DATA/SCOPE Disk Cartridge : Diablo Model 40 Mag-tape : Pertec 8840A (800 bpi) Line drum printer : Data Products model 2230 As the machine was distributed by Nixdorf, the identification of the tape and disk controllers is a bit difficult, but I can take detailed pictures. Thanks a lot for your help ! Dominique