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usb23do

USB/BT controllers to 3DO Interactive Multiplayer.

Overview

Connects USB and Bluetooth controllers to a 3DO console via the PBUS daisy-chain protocol. Supports up to 8 players, USB mouse as a 3DO mouse, extension passthrough for native 3DO controllers, and multiple button mapping profiles. Requires a bidirectional 3.3V-to-5V level shifter.

Input

Output

3DO Output -- PBUS serial PIO protocol with daisy-chain support.

Core Configuration

Setting Value
Routing mode SIMPLE (1:1 controller to PBUS slot)
Player slots 8 (shift on disconnect)
Max USB devices 8
Profile system 3 profiles

Profiles

Hold Select for 2 seconds, then press D-Pad Up/Down to cycle.

Profile Description
Default SNES-style layout (B1=B, B2=C, B3=A)
Fighting Way of the Warrior, SFII (face buttons = punches, shoulders = kicks)
Shooter Doom, PO'ed (shoulders = fire, face = movement actions)

See the Profiles (Detailed) section below for full button mapping tables per profile.

Key Features

  • 8-player support -- Up to 8 USB controllers via USB hub, each mapped to a PBUS slot.
  • Extension passthrough -- Native 3DO controllers connect in series after the USB adapter.
  • Mouse support -- USB mouse emulates 3DO mouse for Myst, The Horde, Lemmings.
  • Device types -- Joypad (2-byte), Joystick (9-byte), and Mouse (4-byte) PBUS reports.

Supported Boards

Board Build Command
RP2040-Zero make usb23do_rp2040zero

Build and Flash

make usb23do_rp2040zero
make flash-usb23do_rp2040zero

Wiring Diagram

USB2-3DO Wiring

Profiles (Detailed)

Default Profile (SNES-Style)

USB Input 3DO Output Notes
B1 (Cross/B) B Middle button
B2 (Circle/A) C Bottom button
B3 (Square/X) A Top button
B4 (Triangle/Y) (disabled)
L1 (LB/L) L Left shoulder
L2 (LT/ZL) L Left shoulder (OR)
R1 (RB/R) R Right shoulder
R2 (RT/ZR) R Right shoulder (OR)
S1 (Select) X Stop button
S2 (Start) P Play/Pause
D-Pad D-Pad Direct mapping
Left Stick D-Pad Stick to D-pad

Fighting Profile

Optimized for Way of the Warrior, Super Street Fighter II Turbo:

USB Input 3DO Output Notes
B1 (Cross/B) B Light Punch
B2 (Circle/A) C Medium Punch
B3 (Square/X) A Heavy Punch
B4 (Triangle/Y) P Light Kick
L1 (LB/L) L Medium Kick
R1 (RB/R) R Heavy Kick
S1 (Select) X Stop
S2 (Start) P Pause

Shooter Profile

Optimized for Doom, PO'ed, Killing Time:

USB Input 3DO Output Notes
B1 (Cross/B) C Jump
B2 (Circle/A) B Action
B3 (Square/X) A Weapon Switch
B4 (Triangle/Y) X Special
L1/L2 L Primary Fire
R1/R2 R Secondary Fire
S2 (Start) P Pause

Compatible Hardware

3DO Consoles

  • Panasonic FZ-1 / FZ-10
  • Goldstar GDO-101M / GDO-202M
  • Sanyo TRY 3DO
  • Creative Labs 3DO Blaster (PC card)

Troubleshooting

Controller not detected:

  • Check PBUS cable connections, especially 5V power.
  • Verify CLK and DATA pin assignments.
  • Ensure the level shifter is wired correctly (all signal lines need 3.3V-to-5V shifting).

Multiple players not working:

  • Verify the USB hub is powered.
  • Check total device count (max 8).
  • Try connecting one controller at a time.

Extension passthrough not working:

  • Check the DATA_IN connection for the daisy chain.
  • The native 3DO controller must be at the end of the chain.

Mouse not working:

  • Verify the game supports the 3DO mouse.
  • Check that the USB mouse is detected.
  • Try a different USB mouse model.