Hello Dave, exactly! But in place of a plain FPGA, nowadays I would choose a FPGA-ARM board, for example the ZedBoard MicroZed or the Myirtech Z-turn, both of them have a Zynq onboard, and they can run linux for the software side and programmable logic for the interface side. Very nice and flexible. For the development, I'm trying to figure if an hybrid QBUS / UNIBUS solution is possible. Of course one have to switch some jumper to avoid conflicts, but hey, in the end you would have a true universal board. What kind of bus transceivers did you used for the QSIC, specially because you have to go from 5V open-drain logic to 3.3V logic? Thanks Andrea On 10/21/2016 07:00 PM, cctalk-request at classiccmp.org wrote: