I have MPE/V that ran on my /42. Is that what you're looking for? SteveRob ---------- CHM has a Series II, Series III and a model 44. Finding MPE that will run on these is the problem. There has been talk of a classic 3000 simulator for a while, but I've not been able to find early enough software releases for the machines with good hardware documentation. The 4x series machines have a console processor is a HP proprietary microcontroller unlike those that came out of Fort Collins.