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Default PC KEYBOARD WIRING SCHEMATIC

I am trying to wire and old 1920's typewriter to a modern PS/2
connection, AT computer keyboard. I plan to basically remove the
control IC from an old keyboard, and wire each keyswitch connection to
a momentary button, which is hooked to mechanical levers in the
typewriter. Does anyone have a wiring diagram of the internal
keyswitches in a standard PC keyboard. I havent been able to fiond one
online, all i keep getting is PS/2 pinouts, or the pinouts for the IC.
thanks in advance,
-Rich