Hi Henk I just did some google and found a web page that looks like it may have technical docs for the M21. Look at: http://www.elhvb.com/mboards/olivetti/system1.html Selecting cap1.pdf brings up a email request. I'm not sure if it will lead to anything but you might get a schematic showing the connector pins. Dwight and may contain information that is privileged, confidential or otherwise exempt delivering this message to the intended recipient, you are hereby notified that any dissemination, distribution, or copying of this communication is strictly prohibited. immediately by telephone and with a "reply" message.