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qmk_firmware/converter/m0110_usb/README.md

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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.
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Read README of top directory too.
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Pictures of **M0110 + M0120** and **M0110A**.
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![M0110+M0120](http://i.imgur.com/dyvXb2Tm.jpg)
![M0110A](http://i.imgur.com/HuHOEoHm.jpg)
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- 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
------
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- 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.
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- 2014/06: Change keymaps
- 2015/03: Add support for "International"(ISO) keyboard(keymap_intl.c)
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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`.
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[![M0110 Converter](http://i.imgur.com/4G2ZOegm.jpg)](http://i.imgur.com/4G2ZOeg.jpg)
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### 4P4C phone handset cable
Note that original cable used with Mac is **straight** while phone handset cable is **crossover**.
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<http://en.wikipedia.org/wiki/Modular_connector#4P4C>
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Close-up picture of handset cable. You can see one end of plug has reverse color codes against the other. Click to enlarge.
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[![4P4C cable](http://i.imgur.com/3S9P1mYm.jpg?1)](http://i.imgur.com/3S9P1mY.jpg?1)
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[Teensy]: http://www.pjrc.com/teensy/
[TMK converter]: https://github.com/tmk/keyboard_converter
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### Socket Pinout
- <http://pinouts.ru/Inputs/MacKeyboard_pinout.shtml>
![Jack fig](http://www.kbdbabel.org/conn/kbd_connector_macplus.png)
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### 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.
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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
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$ make -f Makefile.rev2 clean
$ make -f Makefile.rev2 [KEYMAP={default|intl|spacefn|hasu}]
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Use `Maefile.tmk_rev1` for TMK converter Rev.1, `Makefile.teensy` for Teensy instead.
Keymap
------
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To create your own keymap copy existent keymap file to `keymap_name.c` and edit it.
Debug
-----
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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.
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- Magic combo: `Shift+Option+⌘` or `Shift+Option+Ctrl`(`Shift+Alt+Gui` or `Shift+Alt+Control`)