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, then fixes the header checksum. It's for modders or players wanting to remap controls at the code level. Currently has no endorsements or downloads, and the description is incomplete.
✨ Key Features
📊 Pros & Cons
✅ Pros
- Automates a tedious hex-editing task—no manual byte hunting.
- Checksum fix means the ROM stays valid for emulators and flash carts.
- GUI makes it accessible even if you're not a command-line wizard.
⚠️ Cons
- Zero endorsements and downloads—likely untested by the community.
- Last updated in 2026, but no version info or changelog to gauge maturity.
- Only works on Genesis/Mega Drive ROMs—useless for other systems.
This is for Sega Genesis/Mega Drive modders who need to swap controller ports at the code level, perhaps for custom hardware or accessibility. It's also for players who want to remap controls in ROMs that don't support in-game options. If you're not into ROM hacking or hex editing, this isn't for you.
💡 Beginner Tips
- Always keep a backup of your original ROM before applying the swap.
- Test the modified ROM in an emulator first to ensure the swap works as expected.
- If you're using a flash cart, verify the checksum is correct before flashing.
📊 Mod Details
- Game
- Ps1 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 PS1 Hacks Mods
Apply .xdelta/.ppf patches. Use DuckStation emulator or real PS1.
📖 Full step-by-step install guide for PS1 Hacks →
Visit the official mod page for specific installation instructions for this mod.
🎮 Need cheat codes or console commands? Check ur gaming wiki for PS1 Hacks commands, item IDs, and more.
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