1 PC98 to USB keyboard protocol converter
2 =======================================
3 Target MCU is ATMega32u2 but other USB capable AVR will also work.
5 To initialize keyboard correctly you have to connect keyboard with converter first and then plug them into USB port.
6 Otherwise, keyboard may not work.
23 Wiring: You can change this with editing config.h.
26 ----------------------------------
41 Signal: Asynchronous, Positive logic, 19200baud, Least bit first
42 Frame format: 1-Start bit(Lo), 8-Data bits, Odd-Parity, 1-Stop bit
48 Prebuilt firmware HEX files are available under 'binary' directory.
54 Just use 'make' to bild firmware for TMK PC98 converter(ATMega32u2).
59 To flash firmware run this command
63 then push button on converter to flash firmware.
65 If you are using ATMega32u4 based board use following commands to get firmware HEX file.
67 $ make -f Makefile.32u4 clean
68 $ make -f Makefile.32u4
70 And flash it on your board using specific program method.
76 ,---. ,---. ,------------------------. ,------------------------. ,------------------------.
77 |Stp| |Cpy| | F1 | F2 | F3 | F4 | F5 | | F6 | F7 | F8 | F9 | F10| | F11| F12| F13| F14| F15|
78 `---' `---' `------------------------' `------------------------' `------------------------'
79 ,-------------------------------------------------------------. ,-------. ,---------------.
80 | Esc| 1| 2| 3| 4| 5| 6| 7| 8| 9| 0| -| =|JPY|Bspc| |Ins|Del| |Hom|Hlp| -| /|
81 |-------------------------------------------------------------| |-------| |---------------|
82 | Tab | Q| W| E| R| T| Y| U| I| O| P| [| ]| | |RUp|RDn| | 7| 8| 9| *|
83 |-------------------------------------------------------`Enter| |-------| |---------------|
84 |Ctl|Cap| A| S| D| F| G| H| J| K| L| ;| '| \| | | Up | | 4| 5| 6| +|
85 |-------------------------------------------------------------| |-------| |---------------|
86 | Shift | Z| X| C| V| B| N| M| ,| .| /| RO| Shift | |Lef|Rig| | 1| 2| 3| =|
87 `-------------------------------------------------------------' |-------| |---------------|
88 |Kana|Win|GRP|NFER| Space |XFER| ^2|Win| ^3| | Down | | 0| ,| .| ^1|
89 `-------------------------------------------------------' `-------' `---------------'
90 ^1: Enter on keypad is identical to Enter on alphanumeric portion
91 ^2: ALT on DIGITAL WAVE Dboard while Menu on PC-9821 keyboard
92 ^3: HOME on PC98XL keyboard
93 ^4: CAPS and Kana are locking keys, either mechanically or by firmware emulation
96 ,---. ,---. ,------------------------. ,------------------------. ,------------------------.
97 | 60| | 61| | 62 | 63 | 64 | 65 | 66 | | 67 | 68 | 69 | 6A | 6B | | 52 | 53 | 54 | 55 | 56 |
98 `---' `---' `------------------------' `------------------------' `------------------------'
99 ,-------------------------------------------------------------. ,-------. ,---------------.
100 | 00 | 01| 02| 03| 04| 05| 06| 07| 08| 09| 0A| 0B| 0C| 0D| 0E | | 38| 39| | 3E| 3F| 4D| 41|
101 |-------------------------------------------------------------| |-------| |---------------|
102 | 0F | 10| 11| 12| 13| 14| 15| 16| 17| 18| 19| 1A| 1B| | | 36| 37| | 42| 43| 44| 45|
103 |-------------------------------------------------------` 1C | |-------| |---------------|
104 | 74| 71| 1D| 1E| 1F| 20| 21| 22| 23| 24| 25| 26| 27| 28| | | 3A | | 46| 47| 48| 49|
105 |-------------------------------------------------------------| |-------| |---------------|
106 | 70 | 29| 2A| 2B| 2C| 2D| 2E| 2F| 30| 31| 32| 33| 70/7D | | 3B| 3C| | 4A| 4B| 4C| 4D|
107 `-------------------------------------------------------------' |-------| |---------------|
108 | 72 | 77| 73| 51 | 34 | 35 | 79| 78| 5E| | 3D | | 4E| 4F| 50| 1C|
109 `-------------------------------------------------------' `-------' `---------------'
110 5E: HOME on PC98XL keyboard
111 79: ALT on DIGITAL WAVE Dboard
112 77,78,79: Left Win, right Win and Application on PC-9821 keyboard
116 PC98 keyboard commands
117 ----------------------
118 http://www.webtech.co.jp/company/doc/undocumented_mem/io_kb.txt
120 response from keyboard:
124 Inhibit repeating key:
137 Enabling Win and App key on PC-9821 keyboard:
142 Raku Raku keyboard support
143 --------------------------
144 NEC PC-9801-98-S02 - raku raku keyboard:
145 https://deskthority.net/photos-f62/nec-pc-9801-98-s02-t5212.html
147 To build firmware for the keyboard
149 $ make KEYMAP=rakuraku clean
150 $ make KEYMAP=rakuraku
151 $ make KEYMAP=rakuraku dfu
153 Its scan code map is very different from standard types. This is not tested.
157 Other PC98 converter projects and resource
158 ------------------------------------------
159 PC-9800シリーズ テクニカルデータブック HARDWARE 編 1993年 p139, p343
160 https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n151
161 https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n355
164 http://davy.nyacom.net/kbd98usb/
167 http://www.tsp.ne.jp/~sawada/mago/c_gka98at.htm
168 http://www.tsp.ne.jp/~sawada/mago/src/gka98at.asm
171 http://ixsvr.dyndns.org/usb2pc98
179 - DIGITAL WAVE Dboard
183 PC98 host keeps RDY line high to prevent keyboard from sending data while processing.
185 https://archive.org/stream/PC9800TechnicalDataBookHARDWARE1993/PC-9800TechnicalDataBook_HARDWARE1993#page/n359
187 PC-9801V keyboard requires RDY pulse as acknowledgement from host, it doesn't next data without this. Dboard doens't need this.
190 ### Inhibit key repeating
191 The command(9Ch, 70h) works with Raku Raku keybaord but not with Dboard.
194 Dboard has LEDs but replys with FA to 9D command but ignore it. The LED indicates just its internal states. Dboard replays with FA to 9C command but it doesn't seem to understand repeat setting.
196 PC-9801V has no LEDs and doesn't accept LED command. It replys with 9D to 9D command. PC-9801V doesn't accept repeat setting command. It replys with 9C to 9C command.
200 Note that you have to connect this keyboard with converter before plug in USB port. It seems this keyboard requires for host to send any command before starting to send scan code.
204 Converter doesn't support hotplugging due to limitation of PC-9801 keyboard.
205 You will have to plug keyboard into converter during without power first, and then plug them into USB port.