This simulator, fully compatible with the original cipher machine, enables realistic operation with rotating wheels, setting of wheel pins and drum lugs, combined with authentic graphics. The program comes with a very complete helpfile, containing the manual, the enciphering procedures from the US military and all technical details on the machine. There's also a picture gallery. Complete with formatted clipboard and Autotyping function. With this program you will be able to work with the M-209 and examine how it works and how it was operated. This is a true reference to the M-209, and an educational must! On the bottom of this page you can find some screenshots, taken from the program.
Runs on Windows™ 98/ME/2000/XP/Vista/Win7/Win 8 and on MAC with CrossOver, Parallels Desktop or WINE (open source).
Download the Simulator
Download M-209 Simulator v3.0.1 (Zip 1765 KB)
For non Windows users, there's also a C++ (UNIX/Mac) command line M-209 simulation available at Mark Green's Crypto Pages.
Screenshot with open lid
This program was award winner for programming on PSC in 2005!