AT (5-pin DIN) to ps/2 adapter (Amazon)

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Description

Converts an older AT type keyboard (5pin din) to PS/2 (6pin mini din).

Perfect for converting older keyboard such as IBM PC/AT (84-keys) or 1390120 or 1390131 keyboards with AT connectors to a ps2 connection.

Can be used in combination with ps/2 to USB converter to connect your 1980’s keyboard to a modern 21st century PC or Mac.

http://www.instructables.com/id/Old-Keyboard-5-pin-DIN-to-PS2-converter/

** Note:  This AT to ps/2 adapter would not work with an XT keyboard, such as the IBM PC/XT 83-key keyboard.  XT and AT keyboards share the same physical connector type (5-pin DIN), but the PC/XT protocol is a different signal rate and language (scan code set 1) than the AT /ps/2 protocols (scan code 2).  http://kbdbabel.sourceforge.net/doc/kbd_signaling_pcxt_ps2_adb.pdf

** For those looking to connect their XT keyboard to a modern system, we recommend the following.  https://www.hagstromelectronics.com/products/ke_xtusb.html