142 lines
6.4 KiB
Markdown
142 lines
6.4 KiB
Markdown
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M0110/M0110A to USB keyboard converter
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======================================
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This firmware converts the protocol of Apple Macintosh keyboard M0110/M0110A into USB.
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Target board of this project is [PJRC Teensy](http://www.pjrc.com/teensy/), though,
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you can use other board with USB AVR like `ATmega32U4` and `AT90USB`.
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M0110A support was contributed by [skagon@github](https://github.com/skagon).
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Connection
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----------
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You need 4P4C plug and cable to connect Teensy or other AVR dev board into the keyboard.
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Teensy port `PF0` is assigned for `CLOCK` line and `PF1` for `DATA` by default,
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you can change pin configuration with editing *config.h*.
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You can find 4P4C plugs on telephone handset cable. Note that it is *crossover* connection
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while Macintosh keyboard cable is *straight*.
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[](http://i.imgur.com/vJoVO.jpg)
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In this pic:
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1. `GND`(Black)
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2. `CLOCK`(Red)
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3. `DATA`(Green)
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4. `+5V`(Yellow)
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Not that wire colors may vary in your cable.
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### Pinout
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- <http://pinouts.ru/Inputs/MacKeyboard_pinout.shtml>
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- <http://en.wikipedia.org/wiki/Modular_connector#4P4C>
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### Pull-up Registor
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You may need pull-up registors on signal lines(`CLOCK`, `DATA`) in particular
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when you have long or coiled cable. 1k-10k Ohm will be OK for this purpose.
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In some cases MCU can't read signal from keyboard correctly without pull-up resistors.
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Building Frimware
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-----------------
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To compile firmware you need AVR GCC. You can use [WinAVR](http://winavr.sourceforge.net/) on Windows.
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You can edit *Makefile* and *config.h* to change compile options and pin configuration.
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$ git clone ... (or download source)
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$ cd m0110_usb
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$ make
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and program your Teensy with [PJRC Teensy loader](http://www.pjrc.com/teensy/loader.html).
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Keymap
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------
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You can change keymaps by editing *keymap.c*.
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### M0110
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#### *Default*
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,---------------------------------------------------------.
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| `| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|Backs|
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|---------------------------------------------------------|
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|Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| \|
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|---------------------------------------------------------|
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|Fn0 | A| S| D| F| G| H| J| K| L| ;| '|Return|
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|---------------------------------------------------------|
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|Shift | Z| X| C| V| B| N| M| ,| ,| /|Shift |
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`---------------------------------------------------------'
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|Ctr|Alt | Space |Gui |Ctr|
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`-----------------------------------------------'
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You can register Esc by hitting(press&release) Fn0 quickly.
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#### *HHKB/WASD cursor Layer(Fn0)*
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,---------------------------------------------------------.
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|Esc| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|Delet|
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|---------------------------------------------------------|
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|Caps |Hom| Up|PgU| | | | |Psc|Slk|Pau|Up |Ins| \|
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|---------------------------------------------------------|
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|Fn0 |Lef|Dow|Rig| | | | |Hom|PgU|Lef|Rig|Return|
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|---------------------------------------------------------|
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|Shift |End| |PgD| |VoD|VoU|Mut|End|PgD|Dow|Shift |
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`---------------------------------------------------------'
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|Ctr|Alt | Space |Gui |Ctr|
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`-----------------------------------------------'
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### M0110A
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#### *Default*
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,---------------------------------------------------------. ,---------------.
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| `| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|Backs| |Gui| =| /| *|
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|---------------------------------------------------------| |---------------|
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|Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| | | 7| 8| 9| -|
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|-----------------------------------------------------' | |---------------|
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|Fn0 | A| S| D| F| G| H| J| K| L| ;| '|Return| | 4| 5| 6| +|
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|---------------------------------------------------------| |---------------|
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|Shift | Z| X| C| V| B| N| M| ,| ,| /|Shft|Up | | 1| 2| 3| |
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|---------------------------------------------------------| |-----------|Ent|
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|Ctrl |Alt | Space | \|Lft|Rgt|Dn | | 0| .| |
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`---------------------------------------------------------' `---------------'
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#### *HHKB/WASD cursor Layer(Fn0)*
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,---------------------------------------------------------. ,---------------.
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|Esc| F1| F2| F3| F4| F5| F6| F7| F8| F9|F10|F11|F12|Delet| |Nlk| =| /| *|
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|---------------------------------------------------------| |---------------|
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|Caps |Hom| Up|PgU| | | | |Psc|Slk|Pau|Up |Ins| | | 7| 8| 9| -|
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|-----------------------------------------------------' | |---------------|
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|Fn0 |Lef|Dow|Rig| | | | |Hom|PgU|Lef|Rig|Return| | 4| 5| 6| +|
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|---------------------------------------------------------| |---------------|
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|Shift |End| |PgD| |VoD|VoU|Mut|End|PgD|Dow|Shif|Up | | 1| 2| 3| |
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|---------------------------------------------------------| |-----------|Ent|
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|Ctrl |Alt | Space | \|Lft|Rgt|Dn | | 0| .| |
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`---------------------------------------------------------' `---------------'
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Debug
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-----
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You can use [PJRC HID listen](http://www.pjrc.com/teensy/hid_listen.html) to see debug output.
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The converter has some functions for debug, press `Alt+Gui+H` simultaneously to get help.
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These function is totally undocumented, tentative, inconsistent and buggy.
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Arrow Keys
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----------
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Dedicated arrow keys of the M0110A are transmitting the same scancodes as the keypad but also,
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its [=], [/], [*] and [+] keys (hereafter referred to as "calc" keys) are not assigned new
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scancodes but, instead, transmit a sequence of scancodes which emulates the [Shift] key press,
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followed by the same scancode sequence of the arrow keys!
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The problem with that approach is that, while in most cases it's easy to distinguish between
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a user-generated [Shift] key event (press or release) followed by an arrow or a calc key and
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a simulated [Shift] key event generated upon a calc key event, when the user is typing fairly
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fast, it is possible that the two events become indistinguishable, and produce undesired results
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-- nothing major, though, just one or two stray characters or cursor movements; it will NOT
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format your drives, kill your cat or make your wife run away with the pizza boy.
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