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tmk 7860d09914 Change TMK_DIR setting 7 years ago
..
Makefile Change TMK_DIR setting 7 years ago
README Fix description of pin usage 8 years ago
config.h Fix legacy keymap support 9 years ago
keymap.c Change key_t to keypos_t 7 years ago
led.c Add initial files for PC98 9 years ago
matrix.c Rename file layer_switch to action_layer 9 years ago

README

PC98 to USB keyboard protocol converter
=======================================
Target MCU is ATMega32u4 but other USB capable AVR will also work.


Connector
---------

8Pin mini DIN
___ ___
/ |_| \
/ 8 7 6 \
| 5 4 3 |
\_ 2 1 _/
\_____/
(receptacle)


Wiring: You can change this with editing config.h.

Pin mini DIN MCU
----------------------------------
1 ~RST(TXD) PD3
2 GND GND
3 ~RDY PD4
4 RXD PD2
5 ~RTY PD5
6 NC
7 NC
8 5V VCC




Protocol
--------
Signal: Asynchronous, Positive logic, 19200baud, Least bit first
Frame format: 1-Start bit(Lo), 8-Data bits, Odd-Parity, 1-Stop bit



Build Firmware
--------------
Just use 'make'

$ cd pc98_usb
$ make

Then, load the binary to MCU with your favorite programmer.



Other PC98 converter projects and resource
------------------------------------------
PC98 to USB
http://davy.nyacom.net/kbd98usb/

PC98 to PS/2
http://www.tsp.ne.jp/~sawada/mago/c_gka98at.htm
http://www.tsp.ne.jp/~sawada/mago/src/gka98at.asm

PC98 keyboard commands
http://www.webtech.co.jp/company/doc/undocumented_mem/io_kb.txt


Inhibit repeating key:
0x9C, 0x70