I think the 2650 was later purchased by philips, or someone like that. It was introduced by Signetics in late 1975 or early 1976. The infamous WOM write only memory datasheet was originally introduced by Signetics about the same time as the 2650 family and was often distributed with the 2650 data sheet as a joke.. The largest Commercial user of the 2650 was Infotext later purchased by Addressigraph Multigraph or Addressagrief Multigrief by those of us working there at the time of take over. It was a copy control system and reporting system for large copying machines. Up to 50 systems could communicate with the datalogger over a current loop serial network using the onboard primitive uart on the 2650. We used a card punch to punch the ID and Department info on to plastic access cards. The 2650 was also used in pinball machines where there is still al call for them as replacements. I put a few on ebay about a year or two back, they went fast to several pinball repair guys, I guess there is not much new/old stock remaining.. The other Bob On Wed, 17 May 2006 14:27:14 +0200, Gooijen, Henk wrote: