Sort of. There is some information on the line protocol, but nothing official. There is a implementation of a PVM end node on one of the CBT tapes that could probably be used as a basis.
I do have a somewhat working implementation for very simple Linux console terminal support, but it's not general purpose. I've only read about what the CVM does from the CP Planning and Admin Guide, but it looks like a complicated interface to clone. Is it documented anywhere?
