PC98 to USB keyboard protocol converter
=======================================
-Target MCU is ATMega32u4 but other USB capable AVR will also work.
+Target MCU is ATMega32u2 but other USB capable AVR will also work.
Connector
---------
+On host/converter:
8Pin mini DIN
___ ___
/ 8 7 6 \
| 5 4 3 |
\_ 2 1 _/
- \_____/
+ \_____/
(receptacle)
Pin mini DIN MCU
----------------------------------
- 1 ~RST PD1
+ 1 ~RST(TXD) PD3
2 GND GND
3 ~RDY PD4
4 RXD PD2
- 5 ~RTY PD5
- 6 NC
- 7 NC
+ 5 ~RTY PD1
+ 6 NC
+ 7 NC
8 5V VCC
Signal: 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'
+Just use 'make' to bild firmware for TMK PC98 converter.
- $ cd pc98_usb
+ $ make clean
$ make
-Then, load the binary to MCU with your favorite programmer.
+To flash firmware
+
+ $ make dfu
+
+then push button on converter to flash firmware.
+
+If you are using ATMega32u4 based board instead of premade TMK PC98 converter(ATMega32u2) use following commands.
+
+ $ make -f Makefile.32u4 clean
+ $ make -f Makefile.32u4
+ $ make -f Makefile.32u4 dfu
+
+
+
+PC98 Scan Codes
+---------------
+ ,---. ,---. ,------------------------. ,------------------------. ,------------------------.
+ |Pau| |PrS| | F1 | F2 | F3 | F4 | F5 | | F6 | F7 | F8 | F9 | F10| | F11| F12| F13| F14| F15|
+ `---' `---' `------------------------' `------------------------' `------------------------'
+ ,-------------------------------------------------------------. ,-------. ,---------------.
+ | Esc| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|JPY|Bspc| |Ins|Del| |Hom|End| -| /|
+ |-------------------------------------------------------------| |-------| |---------------|
+ | Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| | |PgD|PgU| | 7| 8| 9| *|
+ |-------------------------------------------------------`Enter| |-------| |---------------|
+ |Ctl|Cap| A| S| D| F| G| H| J| K| L| ;| '| \| | | Up | | 4| 5| 6| +|
+ |-------------------------------------------------------------| |-------| |---------------|
+ | Shift | Z| X| C| V| B| N| M| ,| .| /| RO| Shift | |Lef|Rig| | 1| 2| 3| =|
+ `-------------------------------------------------------------' |-------| |---------------|
+ ^3|Kana|Gui|Alt|MHEN| Space |HENK|Alt|Gui|App|^2 | Down | | 0| ,| .| ^1|
+ `-------------------------------------------------------' `-------' `---------------'
+ ^1: Enter on keypad is identical to Enter on alphanumeric portion.
+ ^2: Right Alt is ALT on DIGITAL WAVE Dboard while Menu on PC-9821 keyboard.
+ App is HOME key on PC98XL keyboard.
+ ^3: Caps and Kana are locking keys, either mechanically or by firmware emulation.
+
+
+ ,---. ,---. ,------------------------. ,------------------------. ,------------------------.
+ | 60| | 61| | 62 | 63 | 64 | 65 | 66 | | 67 | 68 | 69 | 6A | 6B | | 52 | 53 | 54 | 55 | 56 |
+ `---' `---' `------------------------' `------------------------' `------------------------'
+ ,-------------------------------------------------------------. ,-------. ,---------------.
+ | 00 | 01| 02| 03| 04| 05| 06| 07| 08| 09| 0A| 0B| 0C| 0D| 0E | | 38| 39| | 3E| 3F| 4D| 41|
+ |-------------------------------------------------------------| |-------| |---------------|
+ | 0F | 10| 11| 12| 13| 14| 15| 16| 17| 18| 19| 1A| 1B| | | 36| 37| | 42| 43| 44| 45|
+ |-------------------------------------------------------` 1C | |-------| |---------------|
+ | 74| 71| 1D| 1E| 1F| 20| 21| 22| 23| 24| 25| 26| 27| 28| | | 3A | | 46| 47| 48| 49|
+ |-------------------------------------------------------------| |-------| |---------------|
+ | 70 | 29| 2A| 2B| 2C| 2D| 2E| 2F| 30| 31| 32| 33| 70/7D | | 3B| 3C| | 4A| 4B| 4C| 4D|
+ `-------------------------------------------------------------' |-------| |---------------|
+ | 72 | 77| 73| 51 | 34 | 35 | 79| 78| 5E| | 3D | | 4E| 4F| 50| 1C|
+ `-------------------------------------------------------' `-------' `---------------'
+ 5E: HOME on PC98XL keyboard
+ 79: ALT on DIGITAL WAVE Dboard
+ 77,78,79: Left Win, right Win and Application on PC-9821 keyboard
+
+
+
+PC98 keyboard commands
+----------------------
+http://www.webtech.co.jp/company/doc/undocumented_mem/io_kb.txt
+
+response from keyboard:
+ FAh: ACK
+ FCh: NACK
+
+Inhibit repeating key:
+ 9Ch, 70h
+
+LED control:
+ 9Dh 7xh
+
+ second byte:
+ 0111 xxxx
+ |||`- NumLock
+ ||`-- ?
+ |`--- CapsLock
+ `---- Kana
+
+Enabling Win and App key on PC-9821 keyboard:
+ 95h, 03h
+
+
+
+Raku Raku keyboard support
+--------------------------
+NEC PC-9801-98-S02 - raku raku keyboard:
+https://deskthority.net/photos-f62/nec-pc-9801-98-s02-t5212.html
+
+To build firmware for the keyboard
+
+ $ make KEYMAP=rakuraku clean
+ $ make KEYMAP=rakuraku
+ $ make KEYMAP=rakuraku dfu
+
+Its scan code map is very different from standard types. This is not tested.
Other PC98 converter projects and resource
------------------------------------------
+PC-9800シリーズ テクニカルデータブック HARDWARE 編 1993年 p139, p343
+https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n151
+https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n355
+
PC98 to USB
http://davy.nyacom.net/kbd98usb/
http://www.tsp.ne.jp/~sawada/mago/c_gka98at.htm
http://www.tsp.ne.jp/~sawada/mago/src/gka98at.asm
-PC98 keyboard commands
-http://www.webtech.co.jp/company/doc/undocumented_mem/io_kb.txt
+scan code:
+http://ixsvr.dyndns.org/usb2pc98
-Inhibit repeating key:
-0x9C, 0x70
+
+NOTES
+-----
+### Tested on
+- PC-9801V
+- DIGITAL WAVE Dboard
+
+
+### RDY
+Current firmware does not control RDY line and it is drived as low to receive data always. While sending command firmware drive the line high.
+
+PC98 host keeps RDY line high to prevent keyboard from sending data while processing.
+
+https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n359
+
+### Inhibit key repeating
+The command(9Ch, 70h) works with Raku Raku keybaord but not with Dboard.
+
+### LED indicater
+Dboard has LEDs but it seems to ignore LED control command.
projects / max / tmk_keyboard.git / blobdiff