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
- DSETK0023CE03 yellow linear
Hardware
--------
Target MCU is ATMega32u4 but other USB capable AVR will also work.
You can use PJRC Teensy as dev 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 contorol 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| |
`---------------------------------------------' `-----------' `---------------'
