A NOTE FROM ROCKY’S COUNTER

Which connection do you have?

Arcade hardware uses several different connector families. The plugs can look familiar, but they do different jobs. Choose what you see on your equipment to learn what to check next.

DB15 controller port JAMMA arcade edge JVS cabinet I/O

Rocky, white Pekingese in overalls and a Japanese shop headband, holding a circuit board

ATELIER ROCKYSHOP COUNTER / 001

Don’t plug things in just because the connectors fit. Verify pinout, supply voltage and orientation against the actual hardware manuals.

CONN. 01 / DB15

CONNECTION TYPE / 01

DB15 controller port

15 pins · controller-side

Often found on Neo Geo-style superguns and arcade controller setups. A DB15 socket carries switches and button inputs—but the extended button/coin assignments are not universal.

What to check

Check the exact supergun model and revision, connector gender, pin 1 orientation, input logic and every extended-button assignment. Never assume DB15 pinouts match.

At our workshop

USB2JAMMA is being designed for a defined DB15 supergun-controller interface. Its supported profiles, power architecture and actual compatibility still require hardware verification.

CONN. 02 / JAMMA

CONNECTION TYPE / 02

JAMMA arcade edge

Edge connector · cabinet-to-PCB

A standard arcade PCB edge connection carrying more than controller inputs: it also includes power, video, audio and cabinet controls. It is not a DB15 controller port.

What to check

Before connecting a board, check JAMMA orientation, board requirements, voltages, monitor and audio wiring, and any nonstandard cabinet harness alterations.

At our workshop

Our planned USB2JAMMA standalone controller adapter is not a direct JAMMA-edge replacement. Other JAMMA accessories are only research ideas.

CONN. 03 / JVS

CONNECTION TYPE / 03

JVS cabinet I/O

I/O system · protocol-driven

JVS-era machines use cabinet I/O boards and communication links rather than a simple DB15 switch interface. The physical connectors and implementation depend on the equipment.

What to check

Identify the cabinet and I/O board model, wiring, signal roles and required power supplies. Similar-looking USB-style plugs do not guarantee PC USB-controller compatibility.

At our workshop

JVS interfaces are a separate area of our engineering research. No JVS product is currently offered by Atelier Rocky.

ATELIER ROCKY / REFERENCE

A quick comparison

Connection	Usually connects	First thing to verify
DB15	Controller ↔ supergun	Exact controller pinout
JAMMA	Arcade PCB ↔ cabinet harness	Power, video, audio and edge orientation
JVS	Cabinet I/O ↔ arcade system	I/O board, protocol and power

This educational guide is not an installation procedure or a promise of cross-system compatibility.

LAB-001 / USB2JAMMA

What’s on our workbench?

Our first original project is USB2JAMMA. It’s still at the design/prototype stage, not available to order.

Read the USB2JAMMA project notebook ↗

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