Modifying the Required Game Port Number

INFO

If you don't need to switch back and forth between playing "CHUNITHM" and "maimai / ONGEKI", and have no other special requirements, you can safely skip this section.

WARNING

This guide only applies to users connecting via the Official SEGA Serial Protocol. If you modified the configuration files following the tutorial below, but later want to use Virtual Swiping (Enter Key) or AimeIO, please make sure to restore the configuration files to their default settings, otherwise they will not work properly.

Introduction

Game	Default Port Number
maimai DX	COM1
ONGEKI	COM1
CHUNITHM	COM4

The above are the default port numbers for the three games, but they are not fixed. Users can change the card reader port number used by the game by modifying the configuration file.

Consider this scenario: You only have one computer and one card reader, but want to play multiple SEGA rhythm games. Since maimai and ONGEKI have the same default port number, you usually only need to set it up once. However, CHUNITHM's port number is different, which is why this tutorial is necessary.

Currently, most SEGA games use AMDaemon, and card reader related settings are uniformly managed by AMDaemon. Players can change the card reader port number required by the game by modifying the configuration file passed to AMDaemon.

Modifying the Files

File Introduction

The following are the AMDaemon configuration files that might exist in a normal game directory:

• config_client.json, config_server.json Related to the delivery server, can be ignored in this article.
• config_hook.json Comes with Segatools, used to forcibly override some settings.
• config_cvt.json, config_sp.jsonCHUNITHM exclusive configuration files.
• config_common.json Configuration file common to all games.

Usually, the card reader port number configuration is located in config_common.json. But for CHUNITHM, you need to modify config_cvt.json or config_sp.json depending on the cabinet you use at startup.

How to Modify

Open config_common.json or config_cvt.json / config_sp.json, search downwards for the aime entry:

Among them:

"port": 4

The 4 here is the port number used by the card reader (corresponding to COM4). You can change it to any other port number that is not occupied by an official device.

What are the "other port numbers used by official devices"?

Taking CHUNITHM as an example, SEGA officially uses COM1 to connect the Ground Slider (ground touch panel). Therefore, you cannot use COM1 when modifying the card reader port number.

Here are the port numbers officially occupied but unavailable for the card reader in common games:

Game	Occupied Port Numbers and Uses
maimai DX	COM2: VFD Screen COM3 / COM4: 1P / 2P Touch Screen COM21 / COM23: Lighting Board
ONGEKI	COM2: VFD Screen COM3: Lighting Board
CHUNITHM (SP)	COM1: Touch Panel COM2: VFD Screen COM20 / COM21: Lighting Board
CHUNITHM (CVT)	COM1: Touch Panel COM2 / COM3: Lighting Board

The port numbers above cannot be used for the card reader port.

Use Case

Requirement: I only have one computer and one card reader, but want to switch back and forth between playing CHUNITHM and maimai.

You can follow these steps:

1. Edit config_common.json of maimai and change the card reader port number to COM7.
2. Edit config_cvt.json or config_sp.json of CHUNITHM and similarly change the card reader port number to COM7.
3. Open Windows Device Manager, change the actual port number of the card reader to COM7 as well, and re-plug the card reader.

Once completed, you can switch between the two games without having to repeatedly change the card reader port number.