Tool: Makes header editor work with archived/soft-patched ROMs.#31
Open
Tool: Makes header editor work with archived/soft-patched ROMs.#31
Conversation
The NES header editor is currently unable to save a ROM if it was loaded from an archive (such as .zip) or if the ROM was soft-patched. This is because the editor reloads the ROM from disk to then apply the new header and save a copy, but the C# compnent is not able to open archives or apply patches. If the ROM file is in an archive, it throws an Unexpected Error and fails. This change instead makes the editor use the current PRG and CHR ROM. This means it doesn't need to reload the ROM, so it can save it regardless of how it was loaded. It also means that it saves any changes that have been made to the ROM in the session, either by self-flashing or by editing them via tools, which could be seen as a pro or a con. Also, because Mesen does not currently use misc ROM, it is unable to include that in the saved ROM, but this is something we could feasibly add later. This change was written by Sour.
NovaSquirrel
approved these changes
Apr 14, 2026
NovaSquirrel
left a comment
NovaSquirrel
left a comment
There was a problem hiding this comment.
Code looks good and the changes worked fine when I tested them
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
2 participants
Add this suggestion to a batch that can be applied as a single commit.This suggestion is invalid because no changes were made to the code.Suggestions cannot be applied while the pull request is closed.Suggestions cannot be applied while viewing a subset of changes.Only one suggestion per line can be applied in a batch.Add this suggestion to a batch that can be applied as a single commit.Applying suggestions on deleted lines is not supported.You must change the existing code in this line in order to create a valid suggestion.Outdated suggestions cannot be applied.This suggestion has been applied or marked resolved.Suggestions cannot be applied from pending reviews.Suggestions cannot be applied on multi-line comments.Suggestions cannot be applied while the pull request is queued to merge.Suggestion cannot be applied right now. Please check back later.
The NES header editor is currently unable to save a ROM if it was loaded from an archive (such as .zip) or if the ROM was soft-patched. This is because the editor reloads the ROM from disk to then apply the new header and save a copy, but the C# compnent is not able to open archives or apply patches. If the ROM file is in an archive, it throws an Unexpected Error and fails.
This change instead makes the editor use the current PRG and CHR ROM. This means it doesn't need to reload the ROM, so it can save it regardless of how it was loaded. It also means that it saves any changes that have been made to the ROM in the session, either by self-flashing or by editing them via tools, which could be seen as a pro or a con. Also, because Mesen does not currently use misc ROM, it is unable to include that in the saved ROM, but this is something we could feasibly add later.
This change was written by Sour.