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BPS Super Mario Bros. 2 Patcher
What it is
BPS Super Mario Bros. 2 Patcher is a free web page for applying a BPS patch to a Super Mario Bros. 2 ROM. The interface provides separate upload controls for an SMB2 ROM and a BPS patch, followed by an Apply patch button. It validates both files and shows invalid-file messages when they are not accepted. The patcher supports only the NTSC version; the page says an invalid ROM may be a bad dump or the wrong region. During validation, the code can adjust iNES 1.0 and iNES 2.0 headers and align the ROM revision with the patch. It recognizes ROM and patch checksums for revisions 0 and A and can apply a revision conversion patch. After patching, the script saves a .nes file named from the patch filename. The project links to GitHub source code and credits Marc Robledo for Rom patcher JS. Batch patching and command-line support are not provided.
For and against
For
- Free browser-based patching
- Separate ROM and patch uploads
- Checks uploaded files
- Adjusts headers and revisions
- Saves a .nes output file
Against
- Supports NTSC only
- Requires a compatible ROM dump
- No batch patching
- No command-line support
The verdict
This focused web patcher handles BPS application, validation and revision adjustments for the supported NTSC ROM. Its browser interface is straightforward, but regional support and file compatibility are limited.
Who it suits
It suits users who need to apply a BPS patch to an NTSC Super Mario Bros. 2 ROM through a browser. Users should have both required files ready for upload.
On the record
- Apply patch
- The page provides an Apply patch button.producks.github.io · read 5 Oct 2026
- Attribution
- The page attributes the ROM patcher JavaScript to Marc Robledo.producks.github.io · read 5 Oct 2026
- Browser access
- The project is presented as a web page with file upload controls and an Apply patch button.producks.github.io · read 5 Oct 2026
- Header adjustment
- The patcher automatically adapts the iNES header to match the BPS patch.producks.github.io · read 5 Oct 2026
- Header handling
- The maker’s code checks and swaps iNES 1.0 and iNES 2.0 headers while validating the ROM.github.com · read 5 Oct 2026
- Inputs
- The page provides separate upload controls for an SMB2 ROM and a BPS patch.producks.github.io · read 5 Oct 2026
- Interface attribution
- The patcher page credits Marc Robledo for Rom patcher JS.producks.github.io · read 5 Oct 2026
- Invalid ROMs
- The page says an invalid ROM may be a bad dump or the wrong region.producks.github.io · read 5 Oct 2026
- Limits
- The patcher page specifies NTSC support and provides an SMB2 BPS patch upload control.producks.github.io · read 5 Oct 2026
- Maker profile
- Marc Robledo describes himself as a computer engineer.marcrobledo.com · read 5 Oct 2026
- Output
- After applying the patch, the script saves the result with a .nes filename based on the patch filename.github.com · read 5 Oct 2026
- Patch input
- The page lets users upload a BPS patch.producks.github.io · read 5 Oct 2026
- Purpose
- The patcher applies a BPS patch to a Super Mario Bros. 2 ROM.producks.github.io · read 5 Oct 2026
- Region limit
- The patcher only supports the NTSC version.producks.github.io · read 5 Oct 2026
- Revision handling
- The code recognizes ROM and patch checksums for revisions 0 and A, and can apply a revision conversion patch.github.com · read 5 Oct 2026
- ROM input
- The page lets users upload an SMB2 ROM.producks.github.io · read 5 Oct 2026
- ROM region
- The patcher supports only the NTSC version; it says an invalid ROM may be a bad dump or the wrong region.producks.github.io · read 5 Oct 2026
- ROM revision adjustment
- The patcher automatically adapts the ROM revision to match the BPS patch.producks.github.io · read 5 Oct 2026
