P11 is a PDP11 emulator, which currently emulates the following configuration: - a KDJ11A processor (including fpp) - one or more RL-controllers (RLV12) with up to 4 RL02 each - one or more RHV?? controllers with up to 8 RP06 each - an RK11-controller with 22-bit addressing (hey ever saw one?) - a MRV12 option (boot-rom/maintenance and display register) - one or more KL11A controllers with up to 4 serial lines each - a standard printer interface - a read only TM11 tape - a DEQNA ethernet adapter - a toy clock On a 900MHz Athlon under FreeBSD 5.0 a 'make build; make installsrc' of 2.11BSD takes around 2:24 hours - this is several times faster than a real KDJ11A (if /usr is mounted async,noaccesstime). Floating point speed is in the order of 10 times the original. P11 successfully runs RSX11M-PLUS, UN*X Version 5/6/7, 2.11BSD, RT-4 and XXDP.