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Nes Rom Checksum Check

Final Fantasy VII NES Demake (2026 Overhaul Updates)

DrgnMasterKota · 2026-07-12T08:48:15+00:00

This update project has been in the works solo development wise by me on and off for the last year with me completely reverse engineering and coding the game to implement many, many, many needed quality of life improvements to better get this NES Demake inline with the true source material of the original PS1 version. Currently this update goes all the way up to the Mr. Dolphin event in Junon with the Boss battle of Bottomswell. I just wanted to get a playable build out there in the wild for people to playtest and enjoy with the excitement for the updates to come which should be much faster now that I have decompiled all of the code base and understand what I'm working with. I also want to take this time to give full credit to the history work on this FF7 Demake. It started off as a NES Chinese game bootleg released by SHENZHEN NANJING. Then went on to become a massive 4 year long Rom Hacking passion project of Lugia2009 and his team of contributors Lindblum, Chpexo, FlamePurge, Dizzy9, Tsumai, Dr. Mario, Sirasu, keithisgood and Darkmew5. It's thanks to their hard work that we had the polished and happily praised V1.1 game update release that brought the original Chinese game bootleg up to standard. And now I'm doing the same myself as a solo dev to continue to improve the game beyond that standard with these 2026 updates. "This project sounds cool. But DrgnMaster what all does it really change and update?" I'm glad you asked, let me list a few examples. MAIN CHANGES FROM V1.1: - Adjusted the games encounter rate to feel more balanced and less overwhelming. (Yes no more getting into a battle every 3 steps) - Added new custom enemy encounter pools for specific story areas. (Each area now has it's respective enemies only, like the PS1 original, no more random enemies) - Improved enemy variety so different maps feel more distinct. - Increased battle run % chance from original 11% to a balanced 38% based on various level comparisons. - Preserved and improved key music/event cues while also restoring the 3 cut songs from the game "Trail of Blood", "JENOVA" and "Attack on Shinra". - Fixed various found text typos throughout the game. - Removed enemy encounter logic from any locations that shouldn't have it. That is just some of the many big improvements that I have been working on and done for the game. I'd love for this project to inspire other devs to want and contribute to this project further, potentially leading to more massive improvements or additions like adding Yuffie and Vincent into the game or even expanding the story out to fill in some of the missing jumped gaps from the original game. Download the latest update for the project here: How to Apply the Final Fantasy VII Demake V1.2 Patch This is an update patch for Lugia2009’s completed Final Fantasy VII Demake V1.1. What You Need: The original Chinese Final Fantasy VII NES ROM Lugia2009’s Final Fantasy VII Advent Children (Finished Version) Ver.1.1.ips Our Final Fantasy VII Demake V1.2.ips An IPS patching program such as Lunar IPS or Floating IPS Installation: Starting from the original Chinese ROM: Make a backup of your original ROM. Apply Lugia2009’s V1.1 IPS patch to the original Chinese ROM. Apply Final Fantasy VII Demake V1.2.ips to the newly patched V1.1 ROM. Launch the finished ROM in a compatible NES emulator. Already have Lugia2009’s V1.1 ROM: Apply Final Fantasy VII Demake V1.2.ips directly to it. Required V1.1 Base ROM The V1.2 patch must be applied to this exact V1.1 ROM: SHA-256: 240b14662c4cd53a5dc1abf6ee4ec4d5fb1d90b5a2109e50c5e20d30b87eaffb Correct Final V1.2 ROM After patching, the completed ROM should have: SHA-256:108ebeb2fb16e30d1b70ba7ec0d0e9106e0ff6f1cc0cd33c22872f8a51fb7113 Important Do not apply the V1.2 patch directly to the original Chinese ROM. Lugia2009’s V1.1 patch must be applied first. If the game does not work correctly after patching, verify that you used the correct V1.1 base ROM and applied the patches in the correct order: Original Chinese ROM → Lugia2009 V1.1 IPS → Final Fantasy VII Demake V1.2 IPS Link to Lugia2009's V1.1 update patch: https://www.romhacking.net/hacks/1657/ For ease of use feel free to use this online IPS patch website: https://www.marcrobledo.com/RomPatcher.js/ Also make sure to use the NESTOPIA emulator via Retroarch or Standalone as it's the only emulator that supports all the games tweaks and twerks done by everyone over the years. I hope everyone enjoys the update and please feel free to comment below your thoughts on any other potential improvements you'd like to see make it's way to the game. For any questions or if you are interested on helping with the project feel free to add me on Discord @DrgnMasterKota

Thread starter godreborn
Start date May 15, 2019
Views 5,125
Replies 1

godreborn

Welcome to the Machine

Member

Level 33

May 15, 2019

do nes emulators check this or is it even a part of the rom? I patched a few roms, and it doesn't display this info. I was unable to find a checksum repair utility for nes roms (only snes and genesis).

edit: I meant to say in the thread title that I'm looking for a way to repair bad checksum roms.

Last edited by godreborn, May 15, 2019

FAST6191

Techromancer

Editorial Team

Level 33

May 15, 2019

NES ROMS don't have one internally, indeed few things did until somewhat recently. The ines header (something originally made for an emulator but generally used by everything, even found in some Nintendo sourced emulators which amused some. https://wiki.nesdev.com/w/index.php/INES ) does not either.

Can't rule out an emulator one day restricting itself to known ROMs with a known check but for the most part it is arcade emulators that go there, and possibly some N64 emulators.