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