On Sun, Sep 17, 2017 at 8:28 AM, Arthur Krewat <krewat@kilonet.net> wrote:

Was there ever a UNIX or even the thought of porting one to a PDP-10?

36-bit machine, 18-bit addresses (more on KL10 and KS10), and:

*0 would return register 0 instead of a SIGSEGV ;)

8-bit bytes would have been a wasteful exercise, but you never know. (losing 4 bits of every 36-bit word)

IIRC, there was a NetBSD/pdp10. Don't know how far it got.

The instructor of my first C course in college wrote a very good C compiler for TOPS-10/TOPS-20.

Warner