There was some recent discussion of the need for M7237 (KJ11-A Stack Limit Register) boards, and I said I had one, and could scan it (for the PCB traces - they aren't in the FMPS) if someone wanted to duplicate it; I had a request for same, so scans are now online, here: http://ana-3.lcs.mit.edu/~jnc/tech/pdp11/PDP-11_Stuff.html It will be a little bit of work to produce PCB artwork, since some of the traces dive under chips (and I'm not about to lift the chips :-), but from the prints (in the 11/40 print set, page 112) it should be easy to work them out. Noel