On Mon, 2012-12-31 at 17:01 +0100, Rox 64 wrote: > BTW, what version of SIMH did you use when writing your guide, > Hellwig? The simulator is included in the package... ;-) A quick look reveals (in file sim_rev.h): #define SIM_MAJOR 3 #define SIM_MINOR 6 #define SIM_PATCH 0 Hellwig