qmk-dactyl-manuform-a/converter/ibm4704_usb/README.md

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IBM 4704 to USB keyboard converter
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==================================
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This firmware converts IBM 4704 keyboard protocol to USB HID.
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Keyboard initialization process takes a few seconds at start up. During that you will hear buzzer from the keyboard. **You need to plug USB cable after hooking up your keyboard to the converter.**
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Update
------
2015/05/05 Added keymaps for 107-key, 77-key and 50-key. Thanks, orihalcon @ geekhack!
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2015/05/19 Fixed a protocol handling bug.
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Supported Keyboard
------------------
### IBM capacitive switch models:
- 6019273 Model 100 50-key (grid layout) http://kishy.ca/?p=894
- 6019284 Model 200 62-key Alpha(60% layout) http://kishy.ca/?p=894
- 6019303 Model 300 77-key Expanded Alpha http://deskthority.net/photos-f62/ibm-6019303-t8502.html
- 6020218 Model 400 107-key Full key http://kishy.ca/?p=894
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### Alps switch(vintage Green) models:
- 5954339 Japanese 102-key http://deskthority.net/post87127.html#p87127
- 6112883 Japanese 102-key http://geekhack.org/index.php?topic=52888.msg1194489#msg1194489
- 6112884 Japanese 102-key http://geekhack.org/index.php?topic=50437.msg1193047#msg1193047
- 6341739 Chinese 102-key http://geekhack.org/index.php?topic=52888.msg1176566#msg1176566
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Connector
---------
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Keyboard Plug from front:
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DSUB-9
-------------
\ N 2 3 4 5 /
\ N N N N /
---------
2 GND
3 VCC 5V
4 DATA
5 CLOCK
N No connection/No pin.
Connection
----------
In case of using ATMega32U4(Teensy2.0):
1. Supply power with VCC and GND.
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2. Connect CLOCK to PD1 and DATA to PD0. You can change pin with config.h.
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3. Optionally you may need pull-up register. 1KOhm probably work.
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Build Firmware
--------------
Just run `make`:
$ make
To select keymap:
$ make KEYMAP=[plain|...]
Keymap
------
Several version of keymap are available in advance but you are recommended to define your favorite layout yourself. To define your own keymap create file named `keymap_<name>.c` and see keymap document(you can find in top README.md) and existent keymap files.