tmk_keyboard

Keyboard firmwares for Atmel AVR and Cortex-M

tmk 5808317b69 Fix keymap for new framework		11 år sedan
..
Makefile	Add serial_uart.c and use it for PC98	11 år sedan
README	New keymap of PC98	11 år sedan
config.h	Fix software serial configure	11 år sedan
keymap.c	Fix keymap for new framework	11 år sedan
led.c	Add initial files for PC98	11 år sedan
matrix.c	Add serial_uart.c and use it for PC98	11 år sedan

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
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

README