History

tmk 902afcc509 Add doc 4704.txt and protocol comment		2014-02-10 11:05:18 +09:00
..
4704.txt	Add doc 4704.txt and protocol comment	2014-02-10 11:05:18 +09:00
Makefile	Add keymap_hasu.c	2014-02-10 10:01:42 +09:00
README.md	Add keymap_hasu.c	2014-02-10 10:01:42 +09:00
config.h	Add Initial files of 4704_usb	2014-02-09 02:42:17 +09:00
keymap_common.c	Add Initial files of 4704_usb	2014-02-09 02:42:17 +09:00
keymap_common.h	Add keymap_hasu.c	2014-02-10 10:01:42 +09:00
keymap_hasu.c	Add keymap_hasu.c	2014-02-10 10:01:42 +09:00
keymap_plain.c	Add Initial files of 4704_usb	2014-02-09 02:42:17 +09:00
led.c	Add Initial files of 4704_usb	2014-02-09 02:42:17 +09:00
matrix.c	Tweak keyboard initialize	2014-02-09 08:25:23 +09:00

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):

Supply power with VCC and GND.
Connect CLOCK to PD1 and DATA to PD2. You can change pin with config.h.
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.