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
   6 4704 Connector
   7 --------------
   8     Keyboard Plug from front
   9
  10     DSUB-9
  11     -------------
  12     \ N 2 3 4 5 /
  13      \ N N N N /
  14       ---------
  15     2   GND
  16     3   VCC 5V
  17     4   DATA
  18     5   CLOCK
  19     N   No connection/No pin.
  20
  21
  22 Connection
  23 ----------
  24 In case of using ATMega32U4(Teensy2.0):
  25
  26 1. Supply power with VCC and GND.
  27 2. Connect CLOCK to PD1 and DATA to PD2. You can change pin with config.h.
  28 3. Optionally you may need pull-up register. 1KOhm probably work.
  29
  30
  31 Build Firmware
  32 --------------
  33 Just run `make`:
  34
  35     $ make
  36
  37 To select keymap:
  38
  39     $ make KEYMAP=[plain|...]
  40
  41
  42 Keymap
  43 ------
  44 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.