A friend just sent me a pointer to this site, which appears not to have been mentioned on this list before: PDP 11/70 Emulator http://skn.noip.me/pdp11/pdp11.html The site lists these working guest O/Ses: RL0 BSD 2.9 RL1 RSX 11M v3.2 RL2 RSTS/E v7.0 RL3 XXDP RK0 Unix V5 RK1 RT11 v4.0 ------------------------------------------------------------------------------- - Nelson H. F. Beebe Tel: +1 801 581 5254 - - University of Utah FAX: +1 801 581 4148 - - Department of Mathematics, 110 LCB Internet e-mail: beebe(a)math.utah.edu - - 155 S 1400 E RM 233 beebe(a)acm.org beebe(a)computer.org - - Salt Lake City, UT 84112-0090, USA URL: http://www.math.utah.edu/~beebe/ - -------------------------------------------------------------------------------