x68k_usb/README

   1 X68000 to USB keyboard protocol converter
   2 =========================================
   3 SHARP X68000 is a hobby computer released in Japan.(1987-93)
   4 http://en.wikipedia.org/wiki/Sharp_X68000
   5
   6 X68000 keyboard has ALPS linear switches.
   7 - DSETK0016CE01   green linear
   8 - DSETK0023CE03   yellow linear
   9
  10
  11 Hardware
  12 --------
  13 Target MCU is ATMega32u4 but other USB capable AVR will also work.
  14 You can use PJRC Teensy as dev board.
  15     http://www.pjrc.com/teensy/
  16
  17 Wiring:
  18     Mini-DIN            Teensy
  19     -----------------------------------------------------
  20     pin1   +5V          VCC
  21     pin2   MOUSE        -
  22     pin3   RXD          PD2(RXD)
  23     pin4   TXD          PD3(TXD) NOTE: Not supported yet.
  24     pin5   READY        -
  25     pin6   REMOTE       -
  26     pin7   GND          GND
  27
  28
  29 Firmware
  30 --------
  31 Build:
  32     $ cd x68k_usb
  33     $ make
  34
  35 And load the binary to MCU with your favorite programmer.
  36 If you use Teensy you can load with PJRC Teensy Loader tool.
  37     http://www.pjrc.com/teensy/loader.html
  38
  39
  40 *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *   *
  41
  42
  43 X68000 Keyboard Protocol
  44 ========================
  45 http://kyoutan.jpn.org/uts/pc/pic/x68key/
  46
  47
  48 Connector
  49 ---------
  50 Mini DIN 7pin(female connector on computer side)
  51        7 6 5
  52        o o o
  53     4 o  =  o 3
  54         o o
  55         2 1
  56
  57     Mini-DIN
  58     -------------
  59     pin1   +5V
  60     pin2   MOUSE
  61     pin3   RXD
  62     pin4   TXD
  63     pin5   READY
  64     pin6   REMOTE
  65     pin7   GND
  66
  67
  68 Signaling
  69 ---------
  70 - TXD,RXD
  71     Asynchronous, 2400baud, 1-startbit(L), 8-databit, 1-stopbit(H)
  72
  73 - READY
  74     ready/not ready(1/0)
  75
  76
  77 Data from keyboard
  78 ------------------
  79 bit 7       make/break flag(0/1)
  80 bit 6-0     following scan code
  81
  82
  83 Data from computer
  84 ------------------
  85 - LED contorol ON/OFF(0/1)
  86     bit 7   1(fixed)
  87     bit 6   全角
  88     bit 5   ひらがな
  89     bit 4   INS
  90     bit 3   CAPS
  91     bit 2   コード入力
  92     bit 1   ローマ字
  93     bit 0   かな
  94
  95 - Repeat delay
  96     bit 7   0(fixed)
  97     bit 6   1(fixed)
  98     bit 5   1(fixed)
  99     bit 4   0(fixed)
 100     bit 3-0 delay
 101     REPEAT_DELAY = 200+delay*100 ms
 102     default: 500ms
 103
 104 -  Repeat time
 105     bit 7   0(fixed)
 106     bit 6   1(fixed)
 107     bit 5   1(fixed)
 108     bit 4   1(fixed)
 109     bit 3-0 time
 110     REPEAT_TIME = 30+time^2*5 ms
 111     default: 110ms
 112
 113
 114 Scan Codes
 115 ----------
 116 ,---. ,---.    ,-------------------,    ,-------------------.  ,-----------. ,---------------.
 117 | 61| | 62|    | 63| 64| 65| 66| 67|    | 68| 69| 6A| 6B| 6C|  | 5A| 5B| 5C| | 5D| 52| 53| 54|
 118 `---' `---'    `-------------------'    `-------------------'  `-----------' `---------------'
 119 ,-----------------------------------------------------------.  ,-----------. ,---------------.
 120 | 01| 02| 03| 04| 05| 06| 07| 08| 09| 0A| 0B| 0C| 0D| 0E| 0F|  | 36| 5E| 37| | 3F| 40| 41| 42|
 121 |-----------------------------------------------------------|  |------------ |---------------|
 122 |  10 | 11| 12| 13| 14| 15| 16| 17| 18| 19| 1A| 1B| 1C|     |  | 38| 39| 3A| | 43| 44| 45| 46|
 123 |------------------------------------------------------. 1D |  `---=====---' |---------------|
 124 |  71  | 1E| 1F| 20| 21| 2l| 23| 24| 25| 26| 27| 28| 29|    |   ___| 3C|___  | 47| 48| 49| 4A|
 125 |-----------------------------------------------------------|  | 3B|---| 3D| |-----------|---|
 126 |  70    | 2A| 2B| 2C| 2D| 2E| 2F| 30| 31| 32| 33| 34|   70 |  `---| 3E|---' | 4B| 4C| 4D|   |
 127 `-----------------------------------------------------------|  .---=====---. |-----------| 4E|
 128        | 5F| 55 | 56 |     35     | 57 | 58 | 59 | 60|         |  72 |  73 | | 4F| 50| 51|   |
 129        `---------------------------------------------'         `-----------' `---------------'