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Looks like this one? https://en.wikipedia.org/wiki/Convergent_Technologies_Operat...

Thanks for sharing, never heard about it before. What was kernel programming back then? Briefly checked the wikipedia and looks like CTOS was kinda big in the government space back in the 80s.

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It was popular with govt because it came with an HDLC network build-in, server/client depended on the OS you booted. This saved you a network administrator.

The kernel was in Intel ASM86 but the rest of the OS was written in PLM86. When I joined it was 2MB of code on a 128K 8086 cpu. By the time I left it was 9MB of code running on an 80386.

Thanks Joe. Interesting knowledge. I managed to find a FAQ and was surprised that it made to the year 1999.

https://web.archive.org/web/20110708212436/http://www.ctosfa...

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