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 Win32 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 a different controller port without modifying hardware. With zero endorsements and downloads, it's a niche utility with limited community validation.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Handy for using a controller in Port 2 without hardware mods.
- Automatically fixes checksum, so you don't have to do it manually.
- Simple GUI tool—no command line needed.
⚠️ Cons
- Zero endorsements and downloads—untested by the community.
- Only works on Genesis/Mega Drive ROMs, not other systems.
- Potential compatibility risk with ROM hacks or non-standard headers.
Retro gamers who want to play Genesis/Mega Drive games with a controller plugged into Port 2. Also useful for modders testing controller input swaps. If you're a casual player, you might not need it.
💡 Beginner Tips
- Make a backup of your ROM before applying the swap, just in case.
- Use the tool on a clean ROM, not one already modified by other hacks.
- Test the patched ROM in an emulator first to ensure the swap works.
📊 Mod Details
- Game
- Gba 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 GBA Hacks Mods
Apply .ips/.bps patches. Use mGBA emulator or real GBA with flashcart.
📖 Full step-by-step install guide for GBA Hacks →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for GBA Hacks commands, item IDs, and more.
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