In an upcoming project we are trying to Reverse-Engineer a 1970s/1980s era card. The particular protocol is 'q-bus' or known as 'lsi-11'. We are curious as to what devices/software would be required to emulate the interface. It is much like a network between 3 cards we just need to interface somehow with LabVIEW.
The LSI-11 was a PDP-11 cpu in 4 chips and the Q-Bus was the I/O bus that some PDP-11/microVAX processors used. So, what you are asking is equivalent to asking these days how to emulate an Intel cpu and the pci bus. A quick google search turned up some emulators such as the one at http://www.migrationspecialties.com/Emulator-PDP-11.html.