Here is a collection of PDP-11 simulators: Comparison of PDP-11 Simulators Eric Ersatz Supnik 1.0 Begemot -------------+--------------------------------------------------------------- Version | 1994 1.0-BETA 1.0 p11-2.0 | Platform | 32-bit Unix MS-DOS 32-bit Unix BSDi, | SunOS 4.1 & 5.x, | OSF1 (Alpha) | CPU type(s) | PDP-11/40 PDP-11/34A, PDP-11/45 KDJ11A | PDP-11/35, | PDP-11/40 | Floating pt | No FP11A FP11A FP11A | Memory | 124Kw (248Kb) 124Kw (248Kb) 124Kw (248Kb) 512 Kw (1Mbyte) | Peripherals | TM11 RL11/RL01-02 PC11 RLV12/RL02 | RL11/RL02 RK611/RK06-07 DL11 MRV12 | KL11 RX211/RX01-02 LP11 KL11A | KW11 DL11 RK11/RK05 LP11 | LP11 LP11 RLV12/RL01-02 | KW11L RX11/RX01 | Speed(*) | 86 19 84 56 | * Crude speed is the time in seconds to boot 2.9BSD to the single-user prompt from an RL02, on a 486DX2-66 machine with 16M of memory, running either MS-DOS 6.2 or FreeBSD 1.1 There is also a simulator that runs 7th Edition a.out binaries, apout. This doesn't need to simulate devices, so is much faster than the above simulators when performing lots of I/O.