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@@ -2,7 +2,7 @@ M0110/M0110A to USB keyboard converter
2====================================== 2======================================
3This firmware converts the protocol of Apple Macintosh keyboard **M0110**, **M0110A** and **M0120** into USB. Target of this project is USB AVR controller **ATmega32U4**. Using this converter you can revive these retro keyboards with modern computer. 3This firmware converts the protocol of Apple Macintosh keyboard **M0110**, **M0110A** and **M0120** into USB. Target of this project is USB AVR controller **ATmega32U4**. Using this converter you can revive these retro keyboards with modern computer.
4 4
5Pics of **M0110 + M0120** and **M0110A**. 5Pictures of **M0110 + M0120** and **M0110A**.
6 6
7![M0110+M0120](http://i.imgur.com/dyvXb2Tm.jpg) 7![M0110+M0120](http://i.imgur.com/dyvXb2Tm.jpg)
8![M0110A](http://i.imgur.com/HuHOEoHm.jpg) 8![M0110A](http://i.imgur.com/HuHOEoHm.jpg)
@@ -31,7 +31,7 @@ Note that original cable used with Mac is **straight** while phone handset cable
31 31
32<http://en.wikipedia.org/wiki/Modular_connector#4P4C> 32<http://en.wikipedia.org/wiki/Modular_connector#4P4C>
33 33
34Close-up pic of handset cable. You can see one end of plug has reverse color codes against the other. Click to enlarge. 34Close-up picture of handset cable. You can see one end of plug has reverse color codes against the other. Click to enlarge.
35[![4P4C cable](http://i.imgur.com/3S9P1mYm.jpg?1)](http://i.imgur.com/3S9P1mY.jpg?1) 35[![4P4C cable](http://i.imgur.com/3S9P1mYm.jpg?1)](http://i.imgur.com/3S9P1mY.jpg?1)
36 36
37[Teensy]: http://www.pjrc.com/teensy/ 37[Teensy]: http://www.pjrc.com/teensy/
@@ -43,12 +43,12 @@ Close-up pic of handset cable. You can see one end of plug has reverse color cod
43![Jack fig](http://www.kbdbabel.org/conn/kbd_connector_macplus.png) 43![Jack fig](http://www.kbdbabel.org/conn/kbd_connector_macplus.png)
44 44
45 45
46### Pull-up Registor 46### Pull-up Resistor
47You may need pull-up registors 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. 47You 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.
48 48
49 49
50 50
51Building Frimware 51Building Firmware
52----------------- 52-----------------
53To compile firmware you need AVR GCC. You can edit *Makefile* and *config.h* to change compile options and pin configuration. 53To compile firmware you need AVR GCC. You can edit *Makefile* and *config.h* to change compile options and pin configuration.
54 54