MD Port Swap
🟡 Updated this yearPreview
📋 About This Mod
MD Port Swap — Genesis/Mega Drive Controller Port Swapper Win32 GUI tool for Sega Genesis / Mega Drive ROMs that: 1. Swaps all Controller Port 1 <-> Port 2 I/O register references in ROM code. 2. Recomputes and fixes the ROM header checksum afterward. Originally intended for using an external controller as Port 1 on the Sega Nomad, but you can use it however you want The tool scans the whole ROM for these sequences and flips the last byte (03<->05, 09<->0B), which makes the game read/write the pad through the opposite port everywhere in the code, with no game-logic changes. This won't help games that use indirect/computed I/O addressing (rare).
MD Port Swap is a Windows GUI tool that swaps Controller Port 1 and Port 2 I/O references in Sega Genesis/Mega Drive ROMs and fixes the header checksum. It's for players who want to use an external device on a different port. Currently has no endorsements or downloads.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Handy for using external controllers or adapters that need a specific port.
- Automatically fixes checksum, so no manual patching needed.
- Simple GUI makes it accessible even if you're not a tech wizard.
⚠️ Cons
- Zero endorsements and downloads—untested by the community, so use at your own risk.
- Only works on Genesis/Mega Drive ROMs, so it's useless for other systems.
- Potential compatibility issues with ROMs that have unusual code layouts or copy protection.
This is for retro gamers who play Genesis/Mega Drive games on emulators or flash carts and need to swap controller inputs, like when using a fight stick or adapter that only works on port 2. It's also handy for modders tweaking controller support in ROM hacks.
💡 Beginner Tips
- Make a backup of your ROM before running the tool, just in case.
- Test the patched ROM on your emulator first to ensure it works before flashing to hardware.
- If the game has a built-in controller configuration, you might not need this tool.
📊 Mod Details
- Game
- Ps2 Romhacks Mods
- Author
- YoSoyNacho
- Version
- 1.0
- Downloads
- 0
- Endorsements
- 0
- Category
- miscellaneous
- Created
- 7/17/2026
- Updated
- 7/17/2026
- Tags
- Miscellaneous
🔧 How to Install PS2 Hacks Mods
Apply patches. Use PCSX2 emulator or real PS2 with FreeMcBoot.
📖 Full step-by-step install guide for PS2 Hacks →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for PS2 Hacks commands, item IDs, and more.
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