Concurrent Controls Multiuser DOS

On Sat, 3 Oct 2020 at 18:14, Jonathan Haddox via cctalk <cctalk at classiccmp.org> wrote: Concurrent Controls specifically. However, I have been unable to find documentation on it to satisfy my curiosity on how it works and how it is configured. They must have somehow broken the 640K barrier or virtualized each user session, I'd like to understand it better. What were it's limitations, I'm guessing that each user didn't get direct access to hardware. Anyone out there have a document or experience with it? It's just one fork of the old DR Concurrent DOS/386, descended from Concurrent CP/M. The Wikipedia article is a good start: https://en.wikipedia.org/wiki/Multiuser_DOS I say this with slight bias as I wrote a chunk of it. Yes, I had some experience with it, installing and supporting it on customers' systems in the late 1980s. -- Liam Proven ? Profile: https://about.me/liamproven Email: lproven at cix.co.uk ? gMail/gTalk/gHangouts: lproven at gmail.com Twitter/Facebook/LinkedIn/Flickr: lproven ? Skype: liamproven UK: +44 7939-087884 ? ?R (+ WhatsApp/Telegram/Signal): +420 702 829 053