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Manual DLL Hex Editing

Before proceeding

This guide should ONLY be used as a last resort if all other methods fail.
It has a high chance of breaking your game, make backups.

Preamble

We're going to patch Beatmania IIDX 25 CANNON BALLERS, however the process is similar for other BEMANI games.

Here's what you'll need:

  • Your favorite hex editor, here we'll be using HxD.
  • A clean copy of your desired BEMANI game.
  • A backup of your original .dll before editing.

Getting Started

Decide on what hex edits you want to apply, you may find that information from the community or our Resources.

It's time to open our hex editor. If you're using HxD, you'll be greeted with the screen below.

Open your game's .dll file in the hex editor.

For the grand majority of hex edits, this is the main game file, such as bm2dx.dll, soundvoltex.dll, etc..

Pictured below, we've opened up bm2dx.dll inside HxD.

Attention

The edit we'll be applying is EXCLUSIVE to this version of the game and serves as an example.

This means it will not work on any other version of the game, nor any other game!
Hex edits modify specific memory addresses that only apply to very specific game versions.

We'll be editing our game to Unlock All Songs and its edit is:

  • Offset: 0xB60B2
  • Original: 74 10
  • Modified: 90 90

In HxD we're going to hit Ctrl+G to open the Goto window.

From here, we'll input the offset B60B2 in the Offset section as shown below, and hit OK.

Our cursor should be taken to the offset at the exact location you want to edit.

As you can see, the numbers in front of the cursor are 74 and 10 which corresponds to what we need to replace.

If there's a mismatch, it's likely the offset you've put in was wrong, so be sure to double check!

Now all we need to do is select 74 10 and replace it with 90 90.

You can do this by either manually typing 90 90 or by copy and pasting.

It should now look as shown below.

Lastly, simply save your file and repeat these steps for any other edits you want to apply!

If at any point your game has issues due to your edits, restore your backup.