1 PC98 to USB keyboard protocol converter
2 =======================================
3 Target MCU is ATMega32u2 but other USB capable AVR will also work.
20 Wiring: You can change this with editing config.h.
23 ----------------------------------
38 Signal: Asynchronous, Positive logic, 19200baud, Least bit first
39 Frame format: 1-Start bit(Lo), 8-Data bits, Odd-Parity, 1-Stop bit
45 Just use 'make' to bild firmware for TMK PC98 converter.
54 then push button on converter to flash firmware.
56 If you are using ATMega32u4 based board instead of premade TMK PC98 converter(ATMega32u2) use following commands.
58 $ make -f Makefile.32u4 clean
59 $ make -f Makefile.32u4
60 $ make -f Makefile.32u4 dfu
66 ,---. ,---. ,------------------------. ,------------------------. ,------------------------.
67 |Pau| |PrS| | F1 | F2 | F3 | F4 | F5 | | F6 | F7 | F8 | F9 | F10| | F11| F12| F13| F14| F15|
68 `---' `---' `------------------------' `------------------------' `------------------------'
69 ,-------------------------------------------------------------. ,-------. ,---------------.
70 | Esc| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|JPY|Bspc| |Ins|Del| |Hom|End| -| /|
71 |-------------------------------------------------------------| |-------| |---------------|
72 | Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| | |PgD|PgU| | 7| 8| 9| *|
73 |-------------------------------------------------------`Enter| |-------| |---------------|
74 |Ctl|Cap| A| S| D| F| G| H| J| K| L| ;| '| \| | | Up | | 4| 5| 6| +|
75 |-------------------------------------------------------------| |-------| |---------------|
76 | Shift | Z| X| C| V| B| N| M| ,| .| /| RO| Shift | |Lef|Rig| | 1| 2| 3| =|
77 `-------------------------------------------------------------' |-------| |---------------|
78 ^3|Kana|Gui|Alt|MHEN| Space |HENK|Alt|Gui|App|^2 | Down | | 0| ,| .| ^1|
79 `-------------------------------------------------------' `-------' `---------------'
80 ^1: Enter on keypad is identical to Enter on alphanumeric portion.
81 ^2: Right Alt is ALT on DIGITAL WAVE Dboard while Menu on PC-9821 keyboard.
82 App is HOME key on PC98XL keyboard.
83 ^3: Caps and Kana are locking keys, either mechanically or by firmware emulation.
86 ,---. ,---. ,------------------------. ,------------------------. ,------------------------.
87 | 60| | 61| | 62 | 63 | 64 | 65 | 66 | | 67 | 68 | 69 | 6A | 6B | | 52 | 53 | 54 | 55 | 56 |
88 `---' `---' `------------------------' `------------------------' `------------------------'
89 ,-------------------------------------------------------------. ,-------. ,---------------.
90 | 00 | 01| 02| 03| 04| 05| 06| 07| 08| 09| 0A| 0B| 0C| 0D| 0E | | 38| 39| | 3E| 3F| 4D| 41|
91 |-------------------------------------------------------------| |-------| |---------------|
92 | 0F | 10| 11| 12| 13| 14| 15| 16| 17| 18| 19| 1A| 1B| | | 36| 37| | 42| 43| 44| 45|
93 |-------------------------------------------------------` 1C | |-------| |---------------|
94 | 74| 71| 1D| 1E| 1F| 20| 21| 22| 23| 24| 25| 26| 27| 28| | | 3A | | 46| 47| 48| 49|
95 |-------------------------------------------------------------| |-------| |---------------|
96 | 70 | 29| 2A| 2B| 2C| 2D| 2E| 2F| 30| 31| 32| 33| 70/7D | | 3B| 3C| | 4A| 4B| 4C| 4D|
97 `-------------------------------------------------------------' |-------| |---------------|
98 | 72 | 77| 73| 51 | 34 | 35 | 79| 78| 5E| | 3D | | 4E| 4F| 50| 1C|
99 `-------------------------------------------------------' `-------' `---------------'
100 5E: HOME on PC98XL keyboard
101 79: ALT on DIGITAL WAVE Dboard
102 77,78,79: Left Win, right Win and Application on PC-9821 keyboard
106 PC98 keyboard commands
107 ----------------------
108 http://www.webtech.co.jp/company/doc/undocumented_mem/io_kb.txt
110 response from keyboard:
114 Inhibit repeating key:
127 Enabling Win and App key on PC-9821 keyboard:
132 Raku Raku keyboard support
133 --------------------------
134 NEC PC-9801-98-S02 - raku raku keyboard:
135 https://deskthority.net/photos-f62/nec-pc-9801-98-s02-t5212.html
137 To build firmware for the keyboard
139 $ make KEYMAP=rakuraku clean
140 $ make KEYMAP=rakuraku
141 $ make KEYMAP=rakuraku dfu
143 Its scan code map is very different from standard types. This is not tested.
147 Other PC98 converter projects and resource
148 ------------------------------------------
149 PC-9800シリーズ テクニカルデータブック HARDWARE 編 1993年 p139, p343
150 https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n151
151 https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n355
154 http://davy.nyacom.net/kbd98usb/
157 http://www.tsp.ne.jp/~sawada/mago/c_gka98at.htm
158 http://www.tsp.ne.jp/~sawada/mago/src/gka98at.asm
161 http://ixsvr.dyndns.org/usb2pc98
169 - DIGITAL WAVE Dboard
173 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.
175 PC98 host keeps RDY line high to prevent keyboard from sending data while processing.
177 https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n359
179 ### Inhibit key repeating
180 The command(9Ch, 70h) works with Raku Raku keybaord but not with Dboard.
183 Dboard has LEDs but it seems to ignore LED control command.