I have been trying to run diagnostic tapes on my PDP-11/40. It seems that I am missing the documentation for many of the CPU diagnostics. Does anyone have a listing for the 11/40 instruction exerciser? My paper tape is MAINDEC-11-DCQKC-A-PB. I load the tape and start it at 200 and it runs for a while and then begins printing out: PASS #0000 PC=015354 PSW=000000 PASS #0000 PC=015356 PSW=000000 PASS #0000 PC=015360 PSW=000000 PASS #0000 PC=015352 PSW=000001 PASS #0000 PC=015354 PSW=000001 PASS #0000 PC=015356 PSW=000001 PASS #0000 PC=015360 PSW=000001 PASS #0000 PC=015352 PSW=000001 ... This seems to run indefinitely. I have tried several different switch setting as described in the PDP-11 Diagnostic Handbook recently online at bitsavers, but it always ended up with this result. Anyone have information on this diagnostic? -chuck