Open source JVS to PC interface using a Teensy
AnalogJVSy lets you connect your JVS analog controls (USB HID joystick with 4 analog axes + 32 buttons) to your PC and use them as controls, for MAME or other purposes. AnalogJVSy also include a serial command line interface allow you to control the first six JVS outputs (usefull to control Lamps, solenoids, etc.).
AnalogJVSy is base on JVSy project from K4roshi. Use Arduino IDE 1.8.5.
Sucessfully tested on SEGA I/O Board Type 1 (837-13551) and Type 2 (837-13844)
AnalogJVSy is an implementation of a JVS I/O host using a teensy 2.0 and an RS-485 to serial interface. The signals read from the other nodes are then converted to standard HID Joystick signals.
The hardware requires an USB female port, an RS-485 interface and a Teensy 2.0. It has been tested only with an SN75176B and a teensy 2.0, but should also work with a MAX 485. Teensy 2.0++ and Teensy 3.x can be supported in the future.
SN65176B:
- Pin 1: Teensy D2
- Pin 2: Teensy F6
- Pin 3: Teensy F6
- Pin 4: Teensy D3
- Pin 5: Teensy GND
- Pin 6: USB Data+
- Pin 7: USB Data-
- Pin 8: Teensy VCC
USB:
- RED (5v): Teensy B4
- WHITE (Data -): SN65176B 7
- GREEN (Data +): SN65176B 6
- BLACK (GND): Teensy GND
When built, connect the usb cable that comes from your sega i/o board to the usb port you just soldered, while you connect the teensy to your pc with the standard usb port. If flashed correctly it will be recognized as a joystick hid device.
I include a Gerber file to build a 2 layers PCB.
Controls for both player one and two and report as a single HID device (Joystick+Keyboard+Mouse(not use)+serial).
Input switchs and potentiometers are mapped to the corresponding joystick buttons/axes:
| Joystick | Inputs |
|---|---|
| Analog X axe | Analog 1 |
| Analog Y axe | Analog 2 |
| Analog Z axe | Analog 3 |
| Analog Zr axe | Analog 4 |
| Button 1 | Player 1 - Start |
| Button 2 | Player 1 - Service |
| Button 3 | Player 1 - Up |
| Button 4 | Player 1 - Down |
| Button 5 | Player 1 - Left |
| Button 6 | Player 1 - Right |
| Button 7 | Player 1 - Button 1 |
| Button 8 | Player 1 - Button 2 |
| Button 9 | Player 1 - Button 3 |
| Button 10 | Player 1 - Button 4 |
| Button 11 | Player 1 - Button 5 |
| Button 12 | Player 1 - Button 6 |
| Button 13 | Player 1 - Button 7 |
| Button 14 | Player 1 - Button 8 |
| Button 15 | Player 2 - Start |
| Button 16 | Player 2 - Service |
| Button 17 | Player 2 - Up |
| Button 18 | Player 2 - Down |
| Button 19 | Player 2 - Left |
| Button 20 | Player 2 - Right |
| Button 21 | Player 2 - Button 1 |
| Button 22 | Player 2 - Button 2 |
| Button 23 | Player 2 - Button 3 |
| Button 24 | Player 2 - Button 4 |
| Button 25 | Player 2 - Button 5 |
| Button 26 | Player 2 - Button 6 |
| Button 27 | Player 2 - Button 7 |
| Button 28 | Player 2 - Button 8 |
| Button 29 | Test Button |
| Button 30 AND Keyboard key 5 | Coin 1 |
| Button 31 | Not used |
| Button 32 | Not used |
| Hat Up | Not used |
| Hat Down | Not used |
| Hat Left | Not used |
| Hat Right | Not used |
Outputs 1-6 could be controled with the serial line (115Kbps). Syntax is
<OutputPort>;<value>x
with:
- <OutputPort>: 1 to 6 or use port 0 to address all ports
- <value>: 0 (OFF) or 1 (ON) or use the decimal value to set all ports one shot (ie 252 (11111100) will set the 6 outputs ON)
- Examples:
- 1;1x = turn ON output 1.1 (pin51)
- 5;0x = turn OFF output 2.2 (pin54)
- 0;252x = turn ON outputs 1, 2, 3, 4, 5 and 6
| Bit 7 | Bit 6 | Bit 5 | Bit 4 | Bit 3 | Bit 2 | Bit 1 | Bit 0 |
|---|---|---|---|---|---|---|---|
| Output 1 | Output 2 | Output 3 | Output 4 | Output 5 | Output 6 | x | x |
| Output 1.1 | Output 1.2 | Output 1.3 | Output 2.1 | Output 2.2 | Output 2.3 | x | x |
| pin 51 | pin 53 | pin 55 | pin 52 | pin 54 | pin 56 | x | x |
NB: Only the first six outputs are managed with AnalogJVSy (TODO: outputs #7 to #22)
This project is based on: @k4roshi for JVSy digital sketch (https://github.com/k4roshi/JVSy). Thanks for the the wonderful work done.
@roysmeding for the reverse engineering done (https://github.com/TheOnlyJoey/openjvs).
SEGA JVS manual (http://superusr.free.fr/arcade/JVS/JVST_VER3.pdf)
Others similars projects use the same hardware:
- @k4roshi's initial JVSy work (https://github.com/k4roshi/JVSy)
- Adapted version of JVSy by gtranche (https://github.com/gtranche/JVSy)
- Advanced version by FredBedo (https://github.com/Fredobedo/JVS2X)
Many thanks for sharing all these precious sources of information
The license is GPLv3 for all non commercial purposes. Contact me directly if you want to use it commercially.