Hi, in case somebody needs companions for cross-tests or likes to exchange thoughts: A few month ago we bought a PDP-12 and are restoring she since then. There is no online-diary about progress (the maching is eating up all time), but see here: http://c-c-g.de/index.php?option=com_content&view=article&id=311:pd… The 12 is complete with no visible damages and has some undocumented add-ons (they always have). Especially a MOS memory extension was plugged off very soon. Luckily we could organize an 95% complete 2nd module set. After console exchange (we had indeed a 2nd one!) and much trouble with cpu logic, we can now execute opcodes with DO and FILL/EXAM the core memory. Contact me if you like to visit us, we're sitting near G?ttingen (between Kassel and Hannover). Joerg