The keyboard end of the cord has an RJ12 (6p6c) connector with six pins, and looking at the plug with the key up, and pin 1 on the left, pin 2 is Data, pin 3 is Clock, pin 4 is +5v, and pin 5 is ground.
Found on https://geekhack.org/index.php?topic=82503.0 I tried to access the site listed, and it no longer connects, so I called the guy. He took it down about 2 years ago because too many people tried to hack the site. -----Original Message----- From: cctalk [mailto:cctalk-boun...@classiccmp.org] On Behalf Of Rob Jarratt via cctalk Sent: Wednesday, November 06, 2019 8:31 AM To: General Discussion: On-Topic and Off-Topic Posts Subject: Repurposing cable for IBM Model M Keyboard I need a keyboard cable for my VAXmate. This uses an SDL connector on one end and RJ11 on the other. Keyboard cables for the IBM Model M have SDL connectors at one end and a PS/2 connector at the other. I bought one of these cables with the intention of replacing the PS/2 connector with an RJ11. However, I now have a pang of conscience about hacking around with a perfectly good cable, particularly if they are uncommon. How common are these cables? Regards Rob -- This email has been checked for viruses by Avast antivirus software. https://www.avast.com/antivirus