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X68000 to USB keyboard protocol converter
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=========================================
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SHARP X68000 is a hobby computer released in Japan.(1987-93)
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http://en.wikipedia.org/wiki/Sharp_X68000
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X68000 keyboard has ALPS linear switches.
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- DSETK0016CE01 green linear
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- DSETK0022CE02 yellow linear
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- DSETK0023CE03 yellow linear
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Hardware
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--------
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Target MCU is ATMega32u4 but other USB capable AVR will also work.
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You can use PJRC Teensy as development board.
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http://www.pjrc.com/teensy/
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Wiring:
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Mini-DIN Teensy
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-----------------------------------------------------
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pin1 +5V VCC
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pin2 MOUSE -
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pin3 RXD PD2(RXD)
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pin4 TXD PD3(TXD) NOTE: Not supported yet.
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pin5 READY -
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pin6 REMOTE -
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pin7 GND GND
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Firmware
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--------
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Build:
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$ cd x68k_usb
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$ make
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And load the binary to MCU with your favorite programmer.
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If you use Teensy you can load with PJRC Teensy Loader tool.
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http://www.pjrc.com/teensy/loader.html
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* * * * * * * * * * * * * * * * * *
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X68000 Keyboard Protocol
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========================
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http://kyoutan.jpn.org/uts/pc/pic/x68key/
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Connector
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---------
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Mini DIN 7pin(female connector on computer side)
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7 6 5
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o o o
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4 o = o 3
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o o
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2 1
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Mini-DIN
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-------------
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pin1 +5V
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pin2 MOUSE
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pin3 RXD
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pin4 TXD
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pin5 READY
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pin6 REMOTE
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pin7 GND
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Signaling
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---------
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- TXD,RXD
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Asynchronous, 2400baud, 1-startbit(L), 8-databit, 1-stopbit(H)
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- READY
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ready/not ready(1/0)
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Data from keyboard
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------------------
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bit 7 make/break flag(0/1)
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bit 6-0 following scan code
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Data from computer
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------------------
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- LED control ON/OFF(0/1)
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bit 7 1(fixed)
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bit 6 全角
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bit 5 ひらがな
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bit 4 INS
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bit 3 CAPS
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bit 2 コード入力
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bit 1 ローマ字
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bit 0 かな
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- Repeat delay
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bit 7 0(fixed)
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bit 6 1(fixed)
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bit 5 1(fixed)
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bit 4 0(fixed)
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bit 3-0 delay
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REPEAT_DELAY = 200+delay*100 ms
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default: 500ms
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- Repeat time
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bit 7 0(fixed)
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bit 6 1(fixed)
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bit 5 1(fixed)
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bit 4 1(fixed)
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bit 3-0 time
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REPEAT_TIME = 30+time^2*5 ms
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default: 110ms
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Scan Codes
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----------
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,---. ,---. ,-------------------, ,-------------------. ,-----------. ,---------------.
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| 61| | 62| | 63| 64| 65| 66| 67| | 68| 69| 6A| 6B| 6C| | 5A| 5B| 5C| | 5D| 52| 53| 54|
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`---' `---' `-------------------' `-------------------' `-----------' `---------------'
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,-----------------------------------------------------------. ,-----------. ,---------------.
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| 01| 02| 03| 04| 05| 06| 07| 08| 09| 0A| 0B| 0C| 0D| 0E| 0F| | 36| 5E| 37| | 3F| 40| 41| 42|
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|-----------------------------------------------------------| |------------ |---------------|
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| 10 | 11| 12| 13| 14| 15| 16| 17| 18| 19| 1A| 1B| 1C| | | 38| 39| 3A| | 43| 44| 45| 46|
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|------------------------------------------------------. 1D | `---=====---' |---------------|
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| 71 | 1E| 1F| 20| 21| 2l| 23| 24| 25| 26| 27| 28| 29| | ___| 3C|___ | 47| 48| 49| 4A|
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|-----------------------------------------------------------| | 3B|---| 3D| |-----------|---|
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| 70 | 2A| 2B| 2C| 2D| 2E| 2F| 30| 31| 32| 33| 34| 70 | `---| 3E|---' | 4B| 4C| 4D| |
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`-----------------------------------------------------------| .---=====---. |-----------| 4E|
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| 5F| 55 | 56 | 35 | 57 | 58 | 59 | 60| | 72 | 73 | | 4F| 50| 51| |
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`---------------------------------------------' `-----------' `---------------'
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LED Special Functions
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---------------------
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http://homepage2.nifty.com/m_kamada/docs/unlistedx68k.htm#keyboard
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1. Random Illumination
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Plug in with pressing F1, F2 and F3.
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2. Sequential Illumination
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Plug in with pressing 記号入力(52), 登録(53) and HELP.
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3. Scan code Display
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Plug in with pressing かな(5A), ローマ字(5B) and コード入力(5C).
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You can see its scan code on LEDs by pressing a key.
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+---------------------------------------------------+
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|bit|6 |5 |4 |3 |2 |1 |0 |
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|---+----+--------+---+----+----------+--------+----|
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|LED|全角|ひらがな|INS|CAPS|コード入力|ローマ字|かな|
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+---------------------------------------------------+
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