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47 lines
1.2 KiB
Markdown
47 lines
1.2 KiB
Markdown
IBM 4704 to USB keyboard converter
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==================================
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This firmware converts IBM 4704 keyboard protocol to USB HID.
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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.**
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4704 Connector
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--------------
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Keyboard Plug from front:
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DSUB-9
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-------------
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\ N 2 3 4 5 /
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\ N N N N /
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---------
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2 GND
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3 VCC 5V
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4 DATA
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5 CLOCK
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N No connection/No pin.
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Connection
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----------
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In case of using ATMega32U4(Teensy2.0):
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1. Supply power with VCC and GND.
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2. Connect CLOCK to PD1 and DATA to PD0. You can change pin with config.h.
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3. Optionally you may need pull-up register. 1KOhm probably work.
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Build Firmware
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--------------
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Just run `make`:
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$ make
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To select keymap:
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$ make KEYMAP=[plain|...]
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Keymap
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------
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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.
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