Sharp Keyboard

X68000

SHARP X68000 is a hobby computer released in Japan.(1987-93)

TMK X68K-USB converter

• https://github.com/tmk/tmk_keyboard/tree/master/converter/x68k_usb

x68key2

• https://kyoutan.jpn.org/uts/pc/pic/x68key/
• https://kyoutan.jpn.org/uts/pc/pic/x68key2/

X68000テクニカルデータブック

• https://archive.org/details/X68000_488/mode/2up

keyboard

• https://archive.org/details/X68000_488/page/n169/mode/2up

connector

Mini DIN 7pin(female connector on computer side)

   7 6 5            pin1   +5V
   o o o            pin2   MOUSE
4 o  =  o 3         pin3   RXD
    o o             pin4   TXD
    2 1             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

Random Illumination

Plug in with pressing F1, F2 and F3.

Sequential Illumination

Plug in with pressing 記号入力(52), 登録(53) and HELP.

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

mouse

4800baud, 1-start bit, 8bit data, 2-stop bit

• http://www.cityfujisawa.ne.jp/~akitsura/connect/X68_mouse.html
• https://archive.org/details/X68000_488/page/n185/mode/2up?view=theater

X1

http://www.x1center.org/resource/x1kbd.pdf

https://kyouichisato.blogspot.com/2014/07/sharp-x1-ps2.html

MZ-2500

http://www.maroon.dti.ne.jp/youkan/mz2500/kbd.html