This repair follows the documented Controller Pak layout where page 1 contains the index table and page 2 is its full backup. It validates the index checksum over the 123 normal-node entries, requires exactly one invalid page, requires all four redundant ID blocks to be valid and identical, copies the full valid 256-byte index page over the damaged mirror, and emits output only after strict metadata reopen accepts identical valid index copies.
Emulator & Retro Tools
N64 Controller Pak Index Repair
Repair exactly one checksum-invalid 256-byte Controller Pak index page from its valid mirrored index table while preserving every other byte.
01 / Tool workbench
Use the runtime only when it is actually ready.
The application shell fails closed. An input interface is not enabled merely because a WordPress Tool record exists; the declared engine must be registered in the current build.
Session change summary
No output has been built in this session.
02 / Compatibility
Know the supported input before opening a file.
Compatibility fields are intentionally explicit. Missing values stay unclaimed rather than being filled with generic assumptions.
Accepted extensions
.mpk.bin
Platforms
Nintendo 64
Supported versions / editions
Standard 32 KiB Nintendo 64 Controller Pak / Mempak images using the documented page-0 ID redundancy and page-1/page-2 index-table layout.
Input constraints
Input must be exactly 32,768 bytes. All four page-0 ID blocks must be checksum-valid and byte-identical. Exactly one of the page-1/page-2 index tables may fail the documented one-byte checksum; the other must validate. Two invalid index pages or two checksum-valid but different index pages are refused.
Known limitations
No index synthesis from directory entries, no repair when both index pages are bad, no valid-but-disagreeing mirror choice, no directory reconstruction, no chain/orphan repair, no Controller Pak formatting, and no game payload editing.
Output / result
A new 32 KiB Controller Pak copy differing from the source only inside the one repaired 256-byte index page.
03 / Instructions
Use a reversible workflow.
File-oriented workflows start with an untouched original. Tool-specific instructions add only details documented for this utility.
- 01Keep the original
Preserve an untouched copy before creating or transforming binary output.
- 02Confirm scope
Match the file size, format, platform, and version to the support information on this page.
- 03Process locally
Use the runtime only when the page reports that its declared engine is loaded.
- 04Validate output
Compare or test the result before replacing any working source file.
Tool-specific steps
Choose a raw 32 KiB Controller Pak image. Confirm diagnosis shows clean redundant IDs and exactly one invalid index-table page. Download the repaired copy only after the reconstructed image passes strict metadata reopen.
04 / Privacy and processing
The processing mode is part of the product contract.
SaveEditor.com should state local processing only when the implementation truly keeps file contents in the browser. Server or hybrid processing must be disclosed just as clearly.
Declared mode
Browser local
Runtime state
Operational
Tool-specific privacy notes
Phase 48 reads only a user-selected 32 KiB local Controller Pak image in the browser. No fetch, XMLHttpRequest, WebSocket, sendBeacon, form upload, account identifier, save payload, diagnosis, or repair output is sent to SaveEditor. The permanent 16 MiB recovery ceiling remains in force.
05 / Troubleshooting
When a file is rejected, do not force it.
A rejection can indicate an unsupported size, format, version, platform, or byte sequence. Preserve the original and correct the input instead of bypassing validation.
Re-check the documented input type and browser size limit before retrying.
A generic converter does not imply support for every game-specific container, signing scheme, or serialization format.
Return to the untouched source instead of repeatedly processing a damaged or partially transformed file.
Known Tool issues
A clean image is not rewritten. If both index pages fail, both validate but disagree, or the ID redundancy is not clean, the operation stops without an output file.
06 / Verification
Support claims should be traceable.
The verification date, method notes, and public references are kept separate from marketing language so compatibility can be reviewed over time.
Last verified2026-08-10
Profilen64-controller-pak-index-repair
Method notes
Verified with deterministic clean/corrupt Controller Pak fixtures, exact Mupen64Plus checksum reproduction, one-defect-only gating, ambiguous-valid-copy refusal, immutable-source checks, byte-scope assertions, strict metadata reopen, independent Python reconstruction, and source/installable parity.
07 / FAQ
Questions to answer before editing.
These answers are generated from the Tool record and current runtime state rather than generic compatibility promises.
Is N64 Controller Pak Index Repair ready to use?
The Tool record is verified and declares an operational runtime. The page enables its input controls only when the declared engine module is loaded in the current build.
Does processing stay in the browser?
Yes for this declared mode. The loaded runtime processes the explicit input in the browser; Tool-specific privacy notes describe the exact scope and limits.
Should I keep the original file?
Yes. Keep an untouched source file until any generated output has been validated.
What if my input is rejected?
Use the validation message to correct the base, encoding, width, timezone, byte alignment, or size. The runtime does not guess through invalid input.
Related tools
Continue with the same tool family.
Only index-ready verified records from the same Tool Family are shown here.
Related guides
Read the guidance connected to this tool.
Only reviewed, index-ready Guides that explicitly reference this Tool are included.
Beginner
Backups & Safety
Nintendo 64 Controller Pak Backup & Identification Guide
A safety-first Nintendo 64 Controller Pak guide for identifying the intended representation, preserving an untouched source copy, and choosing only a verified compatible Tool.
Beginner
Save File Formats
Nintendo 64 Controller Pak Integrity & Troubleshooting Guide
A fail-closed Nintendo 64 Controller Pak troubleshooting guide for distinguishing representation problems from unsupported semantics and for selecting read-only integrity checks before any repair attempt.