converter/ibm4704_usb/README.md

   1 IBM 4704 to USB keyboard converter
   2 ==================================
   3 This firmware converts IBM 4704 keyboard protocol to USB HID.
   4
   5 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.**
   6
   7
   8 Keyboard models
   9 ---------------
  10 IBM capacitive switch models:
  11     6019273 Model 100 50-key (grid layout)      http://kishy.dyndns.org/?p=977
  12     6019284 Model 200 62-key Alpha(60% layout)  http://kishy.dyndns.org/?p=894
  13     6019303 Model 300 77-key Expanded Alpha     http://kbtalking.cool3c.com/article/23272
  14     6020218 Model 400 107-key Full key          http://kishy.dyndns.org/?p=980
  15
  16 Alps switch(vintage Green) models:
  17     5954339 Japanese 102-key    http://deskthority.net/post87127.html#p87127
  18     6112883 Japanese 102-key    http://geekhack.org/index.php?topic=52888.msg1194489#msg1194489
  19     6112884 Japanese 102-key    http://geekhack.org/index.php?topic=50437.msg1193047#msg1193047
  20     6341739 Chinese 102-key     http://geekhack.org/index.php?topic=52888.msg1176566#msg1176566
  21
  22
  23 Connector
  24 ---------
  25 Keyboard Plug from front:
  26
  27     DSUB-9
  28     -------------
  29     \ N 2 3 4 5 /
  30      \ N N N N /
  31       ---------
  32     2   GND
  33     3   VCC 5V
  34     4   DATA
  35     5   CLOCK
  36     N   No connection/No pin.
  37
  38
  39 Connection
  40 ----------
  41 In case of using ATMega32U4(Teensy2.0):
  42
  43 1. Supply power with VCC and GND.
  44 2. Connect CLOCK to PD1 and DATA to PD0. You can change pin with config.h.
  45 3. Optionally you may need pull-up register. 1KOhm probably work.
  46
  47
  48 Build Firmware
  49 --------------
  50 Just run `make`:
  51
  52     $ make
  53
  54 To select keymap:
  55
  56     $ make KEYMAP=[plain|...]
  57
  58
  59 Keymap
  60 ------
  61 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.