The PDP-11/40 in the University of Toronto's Computer Research Facility (CRF) had a GT-40, and the lead EE prof there loved the screen editor RT-11 provided for it. I never used it, but I was intrigued. (I did land the LM a few times, though. More than a few.)

Across the raised floor aisle was the PDP-11/45, which ran Unix from 5PM to 8AM if I remember right, RT-11 the rest of the time, until some date around 1976 or 1977 (?), when Unix became an unstoppable force for innovation.

-rob

On Sat, Apr 9, 2022 at 4:35 PM Lars Brinkhoff <lars@nocrew.org> wrote:

Dave Horsfall wrote:
>> I have fond memories of playing it on the GT-40, and if Andrew Hume
>> is reading this he'll remember reverse-engineering the code and
>> modifying it for three-play operation; I think Peter Ivanov also
>> implemented reverse gravity...
> Oops; reverse gravity (for the Sun) was implemented for Space Wars (or
> whatever it was called; this was ~40 years ago, so don't expect my memory
> to be the best).

I wonder how many GT40 Spacewar implementations there were?
I have seen two: one from MIT, the other from Stanford.