Modifying the port number required by the game

If you don't need to switch between CHUNITHM and maimai/ONGEKI, and have no other special needs, you can ignore this section.

This article is only for users who connect using the official serial protocol. If you modify some configuration files according to the tutorial below, but want to use Virtual Reader (Enter) or AimeIO, please restore the configuration files to their default configuration, otherwise they will not work.

Introduction

Game	Default Port
maimai DX	COM1
ONGEKI	COM1
CHUNITHM	COM4

The above are the default port numbers for the three rhythm games, but they are not fixed. Users can modify the port number required by the game by modifying the configuration file.

Imagine a scenario where you only have one computer and one card reader, but you want to play multiple games. Since ONGEKI and maimai have the same game port number, you can set it up once and play by default. But since CHUNITHM's card reader port number is different from other games, this tutorial was born.

Currently, most SEGA games use amdaemon. The card reader related settings are controlled by amdaemon. Players can modify the card reader port number required by the game in the configuration file passed to amdaemon.

File Modification

File Introduction

The following are all the configuration files for amdaemon that will appear in a normal game file:

• config_client.json and config_server.json are both related to the content delivery server settings and can be ignored in this article.
• config_hook.json is included with segatools and is used to forcibly overwrite some settings.
• config_cvt.json and config_sp.json are configuration files unique to CHUNITHM.
• config_common.json is a configuration file that all games have.

The port number setting we are looking for is stored in config_common.json, but for CHUNITHM, you need to edit config_cvt.json and config_sp.json depending on the cabinet model used at startup.

Modification

Open config_common.json or config_cvt/sp.json, scroll down and you will find the aime entry:

The 4 after "port": 4 is what we need to modify. We can change it to another port number that is not the same as other port numbers used by the official setup.

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

For example, in CHUNITHM, SEGA officially uses COM1 to connect the Ground Slider (ground touch panel), so you cannot use COM1 when modifying the card reader port number.

The following are the officially used port numbers (excluding the card reader) for common games:

Game	Occupied Port and Purpose
maimai DX	COM2: VFD screen COM3 & COM4: 1P & 2P touch screen COM21 & COM23: Light panels
ONGEKI	COM2: VFD screen COM3: Light panel
CHUNITHM ( SP mode )	COM1: Touch panel COM2: VFD screen COM20 & COM21: Light panels
CHUNITHM ( CVT mode )	COM1: Touch panel COM2 & COM3: Light panels

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

Use Case

I only have one card reader and one computer, but I want to switch between CHUNITHT and maimai. Then you can:

1. Edit maimai's config_common.json and change the card reader port number to COM7.
2. Open CHUNITHM's config_cvt/sp.json and change the card reader port number to COM7 as well.
3. Finally, go to the device manager, change the actual port number of the card reader to COM7, and re-plug it.

This way, you don't need to switch the card reader port number when switching between the two games.