I didn't see a reference to a joystick anywhere and there's none shown in the photo...?
Furthermore :) this spring I visited a PDP 11/73 running Spacewar with a joystick attached. Presumably that would have been attached as a QBus peripheral, and Vaxen could support QBus, so I'd actually be pretty surprised if there hadn't been a Vax with a built-in joystick. Depending how you define "built-in" that is.
Edit: Come to think of it I'd be very surprised if there weren't any flight simulators running off Vaxen and that would definitely involve a very much built-in joystick (along with the rest of the flight deck). I know a lot of those used PDP-11 so it would be the same lineage.
Furthermore :) this spring I visited a PDP 11/73 running Spacewar with a joystick attached. Presumably that would have been attached as a QBus peripheral, and Vaxen could support QBus, so I'd actually be pretty surprised if there hadn't been a Vax with a built-in joystick. Depending how you define "built-in" that is.
Edit: Come to think of it I'd be very surprised if there weren't any flight simulators running off Vaxen and that would definitely involve a very much built-in joystick (along with the rest of the flight deck). I know a lot of those used PDP-11 so it would be the same lineage.