Teensy 3.2 USB converter for IBM Model F (XT) keyboards.
Initially based on https://github.com/noneucat/xt-usb-teensy
Tested with Arduino 1.8.13 and Teensyduino 1.53. You must select Keyboard from the "Tools > USB Type" menu.
| DIN socket pin | Teensy pin |
|---|---|
| 1 (CLK) | Digital 14 |
| 2 (GND) | GND |
| 3 (DATA) | Digital 8 |
| 4 (VCC) | Vin |
| 5 (RESET) | (not connected) |
No additional components are required!
Feel free to customize the Arduino sketch as you see fit. Each physical key press may send up to five key-down events, allowing for simple macros. I'm a Mac user, so I've reassigned some of the keys as follows:
| Model F Key | Sends |
|---|---|
| Alt | Left Command/Windows |
| Caps Lock | Right Option/Alt |
| Numpad 0 | Right Command/Windows |
| Num Lock | Play/Pause |
| Scroll Lock | Mute |
| Numpad - | Volume Down |
| Numpad + | Volume Up |
| Numpad * | Right Ctrl |
| F1* | Ctrl-Opt-Cmd-F (maximize window) |
| F2 | ` (backquote/tilde) |
| F3* | Opt-Cmd-Left (window to left half) |
| F4* | Opt-Cmd-Right (window to right half) |
| F5* | Ctrl-Opt-Cmd-Left (window to prev screen) |
| F6* | Ctrl-Opt-Cmd-Right (window to next screen) |
| F7 | Shift-Cmd-3 (screenshot) |
| F8 | Shift-Cmd-4 (window screenshot) |
| F9 | F14 (decrease brightness) |
| F10 | Left Option/Alt |
* F1/F3/F4/F5/F6 are mapped to my Rectangle hotkeys.
Lock modes (Caps/Num/Scroll) and multiple layers are not implemented.
This code is released to the public domain.