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tmk_keyboard_custom
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tmk_keyboard_custom/converter/ibm4704_usb
tmk 0f827cf94c Add keymap_hasu.c 10 years ago
..
Makefile Add keymap_hasu.c 10 years ago
README.md Add keymap_hasu.c 10 years ago
config.h Add Initial files of 4704_usb 10 years ago
keymap_common.c Add Initial files of 4704_usb 10 years ago
keymap_common.h Add keymap_hasu.c 10 years ago
keymap_hasu.c Add keymap_hasu.c 10 years ago
keymap_plain.c Add Initial files of 4704_usb 10 years ago
led.c Add Initial files of 4704_usb 10 years ago
matrix.c Tweak keyboard initialize 10 years ago

README.md

IBM 4704 to USB keyboard converter

This firmware converts IBM 4704 keyboard protocol to USB HID.

4704 Connector

Keyboard Plug from front

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.
  2. Connect CLOCK to PD1 and DATA to PD2. You can change pin with config.h.
  3. Optionally you may need pull-up register. 1KOhm probably work.

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.