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Lunar IPS
What it is
Lunar IPS is a free Windows utility for creating and applying IPS patches, intended as a lightweight replacement for the SNESTool DOS program. It supports full RLE encoding and decoding, expands or truncates files, and can create an application log named ROMFileName.log. Its encoder produces files no larger than SNESTool’s and avoids the rare 0x454F46 EOF offset bug attributed to that encoder. Windows file association lets users register .IPS files for double-click patching. IPS patching supports files up to 16 MB because the format uses 24-bit addressing; an IPS file itself may be larger. Logging and registration settings are stored in the Windows registry. The listed release is version 1.03, updated February 2, 2022, with a 172K zipped and 437K unzipped archive. Minimum systems are Windows 95 (32-bit) and Windows XP 64-bit. Command-line support and Croatian, Dutch, German, Brazilian Portuguese, Spanish, and Swedish versions are listed.
For and against
For
- Creates and applies IPS patches
- Full RLE encoding and decoding
- Can expand or truncate files
- Optional patch application logs
- Command-line support available
Against
- IPS patching limited to files up to 16 MB
- Windows-only platform support
- Listed release updated February 2, 2022
The verdict
Lunar IPS provides focused IPS patch creation and application with file utilities and Windows integration. The 16 MB format limit and Windows requirements define where it fits.
Who it suits
Lunar IPS suits Windows users who create or apply IPS patches from a graphical or command-line workflow. It is also useful when file expansion, truncation, logging, or file association is needed.
On the record
- Current listed release
- The page lists version 1.03, updated February 2, 2022.fusoya.eludevisibility.org · read 5 Oct 2026
- Download size
- The listed archive size is 172K zipped and 437K unzipped.fusoya.eludevisibility.org · read 5 Oct 2026
- Encoder behavior
- Its encoder avoids the rare 0x454F46 (EOF) offset bug attributed to SNESTool's IPS encoder.fusoya.eludevisibility.org · read 5 Oct 2026
- Encoder output
- Its IPS encoder creates files the same size as or smaller than files created with SNESTool.fusoya.eludevisibility.org · read 5 Oct 2026
- Encoding
- It supports full RLE encoding and decoding.fusoya.eludevisibility.org · read 5 Oct 2026
- File association
- The utility can register the .IPS file type so users can double-click an IPS file and choose a file to patch.fusoya.eludevisibility.org · read 5 Oct 2026
- File handling
- It supports expanding and truncating files.fusoya.eludevisibility.org · read 5 Oct 2026
- File sizing
- It supports expanding and truncating files.fusoya.eludevisibility.org · read 5 Oct 2026
- Logging
- Applying a patch can generate a log named ROMFileName.log.fusoya.eludevisibility.org · read 5 Oct 2026
- Minimum Windows versions
- The listed minimum operating systems are Windows 95 for 32-bit and Windows XP 64-bit for 64-bit.fusoya.eludevisibility.org · read 5 Oct 2026
- Operating system requirements
- The listed minimum operating systems are Windows 95 (32-bit) and Windows XP 64-bit.fusoya.eludevisibility.org · read 5 Oct 2026
- Other languages
- The page lists Croatian, Dutch, German, Brazilian Portuguese, Spanish, and Swedish versions.fusoya.eludevisibility.org · read 5 Oct 2026
- Patch operations
- It can create and apply IPS patches.fusoya.eludevisibility.org · read 5 Oct 2026
- Patch output
- The IPS encoder creates files the same size as or smaller than files created with SNESTool.fusoya.eludevisibility.org · read 5 Oct 2026
- Patch size limit
- IPS patching is supported for files up to 16 MB; the IPS format cannot record changes beyond that mark because it uses 24-bit addressing, though an IPS file itself can be any size.fusoya.eludevisibility.org · read 5 Oct 2026
- Purpose
- Lunar IPS is a lightweight Windows utility intended to replace the SNESTool DOS program.fusoya.eludevisibility.org · read 5 Oct 2026
- Settings storage
- The logging and file registration options are saved to the Windows registry.fusoya.eludevisibility.org · read 5 Oct 2026
- Translations
- The page lists Croatian, Dutch, German, Brazilian Portuguese, Spanish, and Swedish language versions.fusoya.eludevisibility.org · read 5 Oct 2026
