As I mentioned recently, Dave Bridgham and I are doing an RK11 emulator (and
soon an RP11, which just will take editing the Verilog a tiny bit) using an
SD card for storage, for heritage computer collectors who want to run their
PDP-11's but don't want to risk a head crash (since replacement heads are now
un-obtainium) - and also for people who have an -11, but no mass storage.