|
|
@@ -1,79 +1,65 @@
|
|
|
-Sun to USB keyboard protocol converter
|
|
|
-======================================
|
|
|
+PC98 to USB keyboard protocol converter
|
|
|
+=======================================
|
|
|
Target MCU is ATMega32u4 but other USB capable AVR will also work.
|
|
|
-Supported keyboards: Sun Type 5 Keyboard, CTCSP SHORT TYPE KEYBOARD(CKUB)
|
|
|
|
|
|
-CTCSP SHORT TYPE KEYBOARD: http://imgur.com/a/QIv6p
|
|
|
|
|
|
+Connector
|
|
|
+---------
|
|
|
|
|
|
+ 8Pin mini DIN
|
|
|
+ ___ ___
|
|
|
+ / |_| \
|
|
|
+ / 8 7 6 \
|
|
|
+ | 5 4 3 |
|
|
|
+ \_ 2 1 _/
|
|
|
+ \_____/
|
|
|
+ (receptacle)
|
|
|
|
|
|
|
|
|
-Connector
|
|
|
----------
|
|
|
- 8Pin mini DIN
|
|
|
- ___ ___
|
|
|
- / |_| \
|
|
|
- / 8 7 6 \
|
|
|
- | 5 4 3 |
|
|
|
- \_ 2 1 _/
|
|
|
- \_____/
|
|
|
- (receptacle)
|
|
|
-
|
|
|
- Wiring:
|
|
|
+Wiring: You can change this with ediging config.h.
|
|
|
+
|
|
|
Pin mini DIN MCU
|
|
|
----------------------------------
|
|
|
- 1 GND GND
|
|
|
+ 1 ~RST PD1
|
|
|
2 GND GND
|
|
|
- 3 5V
|
|
|
- 4 RX/TX(Mouse)
|
|
|
- 5 RX PD3
|
|
|
- 6 TX PD2
|
|
|
- 7 GND GND
|
|
|
+ 3 ~RDY PD4
|
|
|
+ 4 RXD PD2
|
|
|
+ 5 ~RTY PD5
|
|
|
+ 6 NC
|
|
|
+ 7 NC
|
|
|
8 5V VCC
|
|
|
|
|
|
|
|
|
+
|
|
|
+
|
|
|
Protocol
|
|
|
--------
|
|
|
-Singnal: Asynchronous, Negative logic, 1200baud, No Flow control
|
|
|
-Frame format: 1-Start bit, 8-Data bits, No-Parity, 1-Stop bit
|
|
|
-
|
|
|
- AVR USART engine expects positive logic while Sun keyboard signal is negative.
|
|
|
- To use AVR UART engine you need exteral inverter in front of RX and TX pin.
|
|
|
- Otherwise you can software serial routine to communicate the keyboard.
|
|
|
-
|
|
|
-This converter uses software method, you doesn't need any inverter part.
|
|
|
-
|
|
|
-
|
|
|
-Commands From System To Keyboard
|
|
|
- 0x01 Reset
|
|
|
- Keyboard responds with following byte sequence:
|
|
|
- Success: 0xFF 0x04 0x7F
|
|
|
- Fail: 0x7E 0x01 0x7F
|
|
|
- 0x02 Bell On
|
|
|
- 0x03 Bell Off
|
|
|
- 0x0A Click On
|
|
|
- 0x0B Click Off
|
|
|
- 0x0E LED
|
|
|
- followed by LED status byte:
|
|
|
- bit: 3 2 1 0
|
|
|
- LED: CapsLk ScrLk Compose NumLk
|
|
|
- 0x0F Layout
|
|
|
- Keyboard responds with 'Layout Response' 0xFE 0xXX
|
|
|
-
|
|
|
-Commands From Keyboard To System
|
|
|
- 0x7F Idle
|
|
|
- means no keys pressed.
|
|
|
- 0xFE Layout Response
|
|
|
- 0xFF Reset Response(followed by 0x04)
|
|
|
-
|
|
|
-Reference
|
|
|
- http://kentie.net/article/sunkbd/page2.htm
|
|
|
- http://kentie.net/article/sunkbd/KBD.pdf
|
|
|
+Singnal: Asynchronous, Positive logic, 19200baud, Least bit first
|
|
|
+Frame format: 1-Start bit(Lo), 8-Data bits, Odd-Parity, 1-Stop bit
|
|
|
+
|
|
|
+This converter uses software method for testing purpose. AVR UART engine will work better.
|
|
|
+
|
|
|
+
|
|
|
|
|
|
|
|
|
Build Firmware
|
|
|
--------------
|
|
|
Just use 'make'
|
|
|
- $ cd sun_usb
|
|
|
+
|
|
|
+ $ cd pc98_usb
|
|
|
$ make
|
|
|
+
|
|
|
Then, load the binary to MCU with your favorite programmer.
|
|
|
+
|
|
|
+
|
|
|
+
|
|
|
+Other PC98 converter projects and resource
|
|
|
+------------------------------------------
|
|
|
+PC98 to USB
|
|
|
+http://davy.nyacom.net/kbd98usb/
|
|
|
+
|
|
|
+PC98 to PS/2
|
|
|
+http://www.tsp.ne.jp/~sawada/mago/c_gka98at.htm
|
|
|
+
|
|
|
+PC98 keyboard commands
|
|
|
+http://www.webtech.co.jp/company/doc/undocumented_mem/io_kb.txt
|
tmk