| .. | ||
| config.h | ||
| ibm4704.txt | ||
| keymap_common.c | ||
| keymap_common.h | ||
| keymap_hasu.c | ||
| keymap_plain.c | ||
| led.c | ||
| Makefile | ||
| matrix.c | ||
| README.md | ||
IBM 4704 to USB keyboard converter
This firmware converts IBM 4704 keyboard protocol to USB HID.
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.
Supported Keyboard
IBM capacitive switch models:
- 6019273 Model 100 50-key (grid layout) http://kishy.dyndns.org/?p=977
- 6019284 Model 200 62-key Alpha(60% layout) http://kishy.dyndns.org/?p=894
- 6019303 Model 300 77-key Expanded Alpha http://kbtalking.cool3c.com/article/23272
- 6020218 Model 400 107-key Full key http://kishy.dyndns.org/?p=980
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
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 PD0. 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.