47 lines
1.2 KiB
Markdown
47 lines
1.2 KiB
Markdown
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.**
|
|
|
|
|
|
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 PD0. 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.
|