# Arduino-based PS2 -> Macintosh Plus keyboard adapter
This sketch allows to use a PS/2 keyboard with the Macintosh Plus. Mapping between PS/2 keys and Mac keys is stored in the [keymap.ino](mac_plus_ps2/keymap.ino) file. Sketch uses a modified version of the [PS2Keyboard Library](http://www.pjrc.com/teensy/td_libs_PS2Keyboard.html) --- all the logic except `getScanCode()` method have been stripped.
## Connecting to Macintosh Plus
Get a phone cord with RJ10 plug and connect pin as follows:
1. Vcc -> +5V
2. +DATA -> pin 5,
3. +CLK -> pin 6,
4. GND -> GND.
The order of RJ10 pins is the same as in the computer connector:
## Connecting to PS/2 keyboard
For the Mini-DIN 6 plug, pins should be connected as follows:
1. +DATA -> pin 3,
2. -,
3. GND -> GND,
4. Vcc -> +5V,
5. +CLK -> pin 2,
6. -
Pinout for the female connector from front (copied from [Wikipedia](https://en.wikipedia.org/wiki/PS/2_port)):
## References
* [Similar project based on stm32f0discovery kit](http://www.synack.net/~bbraun/mackbd/index.html),
* [Mac Plus technical information](http://www.mac.linux-m68k.org/devel/plushw.php) - contains the description of the protocol,
* [Mac Plus keyboard rawcodes](https://github.com/altercation/tmk_firrmware_hhkb_teensy2/blob/master/protocol/m0110.c).