> I had never seen the original article Well, most people consider the "MEMO ON THE SECRET FEATURES OF 6309" by Hirotsugu Kakugawa as the "original", but he's just been resuming the info he read in the Japanese magazine "Oh!FM": http://www-users.rwth-aachen.de/torsten.dittel/CoCo/Oh!FM/oh_fm.htm Best regards, Torsten