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Diffstat (limited to 'converter/pc98_usb/README')
| -rw-r--r-- | converter/pc98_usb/README | 102 |
1 files changed, 44 insertions, 58 deletions
diff --git a/converter/pc98_usb/README b/converter/pc98_usb/README index 7b4f95ca25..7d9547d508 100644 --- a/converter/pc98_usb/README +++ b/converter/pc98_usb/README @@ -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 |