M0110/M0110A to USB keyboard converter ====================================== This firmware converts the protocol of Apple Macintosh keyboard **M0110**, **M0110A** and **M0120** into USB. Target of this project is USB AVR controller like **ATmega32U2** and **ATmega32U4**. Using this converter you can revive these retro keyboards with modern computer. Read README of top directory too. Pictures of **M0110 + M0120** and **M0110A**.   - M0110A support was contributed by [skagon@github](https://github.com/skagon). - M0120 also is supported. keys(+ * / and ,) on M0120 are recognized as cursor keys. Update ------ - 2013/08: Change port for signals `PF` to `PD` - 2013/09: Change port again, it uses inversely `PD0` for data and `PD1` for clock line now. - 2014/06: Change keymaps - 2015/03: Add support for "International"(ISO) keyboard(keymap_intl.c) Building Hardware ----------------- You need [TMK converter] or AVR dev board like PJRC [Teensy]. Port of the MCU `PD1` is assigned to `CLOCK` line and `PD0` to `DATA` by default, you can change pin configuration with editing `config.h`. [](http://i.imgur.com/4G2ZOeg.jpg) ### 4P4C phone handset cable Note that original cable used with Mac is **straight** while phone handset cable is **crossover**. <http://en.wikipedia.org/wiki/Modular_connector#4P4C> Close-up picture of handset cable. You can see one end of plug has reverse color codes against the other. Click to enlarge. [](http://i.imgur.com/3S9P1mY.jpg?1) [Teensy]: http://www.pjrc.com/teensy/ [TMK converter]: https://github.com/tmk/keyboard_converter ### Socket Pinout - <http://pinouts.ru/Inputs/MacKeyboard_pinout.shtml>  ### Pull-up Resistor You may need pull-up resistors on signal lines(`CLOCK`, `DATA`) in particular when you have long or coiled cable. **1k-10k Ohm** will be OK for this purpose. In that case the converter may not read signal from keyboard correctly without pull-up resistors. Building Firmware ----------------- To compile firmware you need AVR GCC. You can edit *Makefile* and *config.h* to change compile options and pin configuration. Also `KEYMAP` option can be used to select keymap. $ git clone git://github.com/tmk/tmk_keyboard.git (or download source) $ cd m0110_usb $ make -f Makefile clean $ make -f Makefile [KEYMAP={default|plain|intl|spacefn|hasu}] Use `Makefile.teensy` instead for Teensy. Keymap ------ To create your own keymap copy existent keymap file to `keymap_name.c` and edit it. You can build it like this. $ make -f Makefile clean $ make -f Makefile KEYMAP=name Debug ----- You can use [PJRC HID listen](http://www.pjrc.com/teensy/hid_listen.html) to see debug output. The converter has some functions for debug, press `<Magic>+H` simultaneously to get help. - Magic combo: `Shift+Option+⌘` or `Shift+Option+Ctrl`(`Shift+Alt+Gui` or `Shift+Alt+Control`)