84 lines
3.5 KiB
Markdown
84 lines
3.5 KiB
Markdown
# Poor man's "Keyrah" to connect C64 keyboard to USB (for BMC64 emulator)
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## Building
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- Solder all keyboard connector pins to Arduino Pro Micro.
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- You can solder Restore key (connector pin "I") paraller to some other pin. I soldered "I" and "G" to Arduino pin A8. (this is actually not needed, because there is one free pin left). [Pins I used](https://github.com/mcgurk/Arduino-USB-HID-RetroJoystickAdapter/blob/master/C64_keyboard/README.md#pins-i-used).
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- You can also connect LED of C64 to VCC/GND of Arduino. I used 220ohm resistor.
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## Firmware/flashing
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- Download Soarer controller firmware (Soarer_Controller_v1.20_beta4.zip): https://geekhack.org/index.php?topic=50437.0 (or https://deskthority.net/workshop-f7/soarer-s-keyboard-controller-firmware-t6767.html)
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- Extract /firmware/Soarer_Controller_v1.20_beta4_atmega32u4.hex from Soarer_Controller_v1.20_beta4.zip
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- Install Arduino IDE
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- Connect RST to GND couple of times to get Arduino Pro Micro to programming mode (notice that com-port is different in programming mode in Windows)
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- Flash firmware
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```
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& "C:\Program Files (x86)\Arduino\hardware\tools\avr/bin/avrdude" -C"C:\Program Files (x86)\Arduino\hardware\tools\avr/etc/avrdude.conf" -v -p m32u4 -c avr109 -P COM5 -b 57600 -U flash:w:firmware\Soarer_Controller_v1.20_beta4_atmega32u4.hex:i
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```
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## Setup
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- Download [config file](https://github.com/mcgurk/Arduino-USB-HID-RetroJoystickAdapter/raw/master/C64_keyboard/C64_matrix.sc). Check pin order to match your setup.
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- Compile and upload config file to Arduino Pro Micro
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```
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.\scas C64_matrix.sc C64_matrix.bin
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.\scwr C64_matrix.bin
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```
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## Menu key
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- .crt-files doesn't work with C= + F7, so as workaround LSHIFT + F7 is F12.
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## Testing
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- https://keycode.info/
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## Pins I used
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```
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// Pin Label
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// 20(A) 2(D2/PD1)
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// 19(B) 3(D3/PD0)
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// 18(C) 4(D4/PD4)
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// 17(D) 5(D5/PC6)
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// 16(E) 6(D6/PD7)
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// 15(F) 7(D7/PE6)
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// 14(G) 8(D8/PB4)
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// 13(H) 9(D9/PB5)
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// 12(0) 10(D10/PB6)
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// 11(1) 16(D16/PB2)
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// 10(2) 14(D14/PB3)
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// 9(3) 15(D15/PB1)
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// 8(4) A0(A0/PF7)
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// 7(5) A1(A1/PF6)
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// 6(6) A2(A2/PF5)
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// 5(7) A3(A3/PF4)
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// 4 N/C
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// 3(8) TX(D1/PD3)
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// 2 N/C
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// 1(I) 8(D8/PB4)
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```
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## Issue (fixed in newer BCM64 versions)
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- "+", "-", "£", "@" and "*" doesn't produce GFX-chars when shifted
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#### "Repair" rpi_sym.vkm (1.0.9)?
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- at 5 6 0 -> 5 6 8
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- minus 5 3 0 -> 5 3 8
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- plus 5 0 0 -> 5 0 8
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- sterling 6 0 0 -> 6 0 8
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- asterisk 6 1 0 -> 6 1 8
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```
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sed -i 's/5 6 0/5 6 8/g; s/5 3 0/5 3 8/g; s/5 0 0/5 0 8/g; s/6 0 0/6 0 8/g; s/6 1 0/6 1 8/g' rpi_sym.vkm
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```
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## Links
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- https://geekhack.org/index.php?topic=50437.0
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- https://deskthority.net/workshop-f7/soarer-s-keyboard-controller-firmware-t6767.html
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- Newest I found was Soarer_Controller_v1.20_beta4.zip from 26.10.2013
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- Soarer config file documentation: https://deskthority.net/download/file.php?id=8833 (Soarer_Converter_v1.12_docs.zip)
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- Keynames used in config file from https://deskthority.net/download/file.php?id=8833 (Soarer_Converter_v1.12_docs.zip): /docs/codes.html
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- https://www.waitingforfriday.com/wp-content/uploads/2017/01/C64_Keyboard_Schematics_PNG.png
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- http://kookye.com/wp-content/uploads/2016/02/Pinout-ProMicro.jpg
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- I used this as starting point: https://github.com/abzman/Keyboard-config-file/blob/master/C64_matrix.sc
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- C64-emulator for Raspberry Pi 2/3: http://accentual.com/bmc64/
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