2013-02-23 01:15:03 +09:00
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PC98 to USB keyboard protocol converter
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=======================================
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2018-06-07 17:29:13 +09:00
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Target MCU is ATMega32u2 but other USB capable AVR will also work.
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2013-02-22 09:53:46 +09:00
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2013-02-23 01:15:03 +09:00
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Connector
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---------
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2013-02-22 09:53:46 +09:00
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2013-02-23 01:15:03 +09:00
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8Pin mini DIN
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___ ___
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/ |_| \
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/ 8 7 6 \
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| 5 4 3 |
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\_ 2 1 _/
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2018-06-07 17:29:13 +09:00
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\_____/
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2013-02-23 01:15:03 +09:00
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(receptacle)
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2013-02-22 09:53:46 +09:00
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2014-01-04 22:45:52 -05:00
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Wiring: You can change this with editing config.h.
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2013-02-23 01:15:03 +09:00
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2013-02-22 09:53:46 +09:00
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Pin mini DIN MCU
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----------------------------------
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2014-04-25 15:16:12 +09:00
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1 ~RST(TXD) PD3
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2013-02-22 09:53:46 +09:00
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2 GND GND
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2013-02-23 01:15:03 +09:00
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3 ~RDY PD4
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4 RXD PD2
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5 ~RTY PD5
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2018-06-07 17:29:13 +09:00
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6 NC
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7 NC
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2013-02-22 09:53:46 +09:00
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8 5V VCC
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2013-02-23 01:15:03 +09:00
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2013-02-22 09:53:46 +09:00
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Protocol
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--------
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2014-01-04 22:45:52 -05:00
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Signal: Asynchronous, Positive logic, 19200baud, Least bit first
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2013-02-23 01:15:03 +09:00
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Frame format: 1-Start bit(Lo), 8-Data bits, Odd-Parity, 1-Stop bit
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2013-02-22 09:53:46 +09:00
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Build Firmware
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--------------
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Just use 'make'
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2013-02-23 01:15:03 +09:00
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$ cd pc98_usb
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2013-02-22 09:53:46 +09:00
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$ make
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2013-02-23 01:15:03 +09:00
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2013-02-22 09:53:46 +09:00
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Then, load the binary to MCU with your favorite programmer.
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2013-02-23 01:15:03 +09:00
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Other PC98 converter projects and resource
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------------------------------------------
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PC98 to USB
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http://davy.nyacom.net/kbd98usb/
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PC98 to PS/2
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http://www.tsp.ne.jp/~sawada/mago/c_gka98at.htm
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2013-02-24 18:10:50 +09:00
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http://www.tsp.ne.jp/~sawada/mago/src/gka98at.asm
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2013-02-23 01:15:03 +09:00
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2018-06-07 17:29:13 +09:00
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scan code:
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http://ixsvr.dyndns.org/usb2pc98
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NEC PC-9801-98-S02 - raku raku keyboard:
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https://deskthority.net/photos-f62/nec-pc-9801-98-s02-t5212.html
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2013-02-23 01:15:03 +09:00
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PC98 keyboard commands
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2018-06-07 17:29:13 +09:00
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----------------------
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2013-02-23 01:15:03 +09:00
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http://www.webtech.co.jp/company/doc/undocumented_mem/io_kb.txt
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2013-02-24 18:10:50 +09:00
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2018-06-07 17:29:13 +09:00
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response from keyboard:
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FAh: ACK
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FCh: NACK
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2013-02-24 18:10:50 +09:00
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Inhibit repeating key:
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2018-06-07 17:29:13 +09:00
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0x9C, 0x70
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LED control:
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9Dh 7xh
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second byte:
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0111 xxxx
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|||`- NumLock
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||`-- ?
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|`--- CapsLock
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`---- Kana
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