Also, SGI keyboards never used ADB. Indigo-era SGIs used a mini-DIN keyboard/mouse, but it was proprietary. They were PS/2 starting with the Indigo2 and Indy.

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fabiensanglard an hour ago | parent [-]

Thank you, I double checked in the SGI hardware developer handbook and it looks like you were correct.

Do you know if I can find a better source than that to confirm?

	▲	mrpippy an hour ago \| parent [-]
		These links show the pinout: https://hardware.majix.org/computers/sgi/keyboards.shtml https://hardware.majix.org/computers/sgi.pi/keyboard.shtml And the keyboard(7) man page actually has full details on the protocol (Indigo uses the mini DIN-6): https://github.com/jtsiomb/sgikbd/blob/master/doc/sgi_man7_k...