No, this keyboard is not AT compatible. It uses a different protocol. I have a 3192, but I don't have a keyboard for it yet, so I don't know if it differs from the RJ45 style terminal keyboards in just connector or if the protocol is different too. Neither are AT-compatable though. There is a device called a Soarers converter (unsure on spelling) that will convert it to USB and allow it to act as a normal HID keyboard. I haven't played with mine enough to know how well it works, so YMMV. ________________________________ From: Charles Dickman via cctalk <cctalk at classiccmp.org> Sent: Wednesday, 22 August 2018 20:16 To: General Discussion: On-Topic and Off-Topic Posts Subject: IBM Model M keyboard for 3192 I got a box of miscellaneous model M keyboards last week. One of them has 122 keys and the connector is the size of a PC/AT type circular DIN connector, but the 5 pins are spread over 240deg instead of the AT's 180deg. The part no. is 1390702 and a little research found it is Is it electrically/protocol compatible with the PC/AT and PS/2 keyboard or a different animal completely? -chuck