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qmk_firmware/converter/pc98_usb
History
tmk 84a3d4d2a1 Edit README of PC98 12 years ago
..
Makefile Add initial files for PC98 12 years ago
README Edit README of PC98 12 years ago
command_extra.c Add initial files for PC98 12 years ago
config.h Add keymap for PC98 12 years ago
keymap.c Add keymap for PC98 12 years ago
led.c Add initial files for PC98 12 years ago
matrix.c Add keymap for PC98 12 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 ediging config.h.

    Pin mini DIN        MCU
    ----------------------------------
    1  ~RST             PD1
    2   GND             GND
    3  ~RDY             PD4
    4   RXD             PD2
    5  ~RTY             PD5
    6   NC                 
    7   NC                 
    8   5V              VCC




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

This converter uses software method for testing purpose. AVR UART engine will work better.




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

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