From WikiTemp, the GBAtemp wiki
Revision as of 06:54, 3 September 2019 by Nanook (talk | contribs)

Glossary

The NKit documentation uses the terms below. To prevent repeated explanation of words and terms in other articles they are listed and briefly explained once here.


They are listed in a related logical order rather than alphabetically.

General Terms

Nkit
Nintendo ToolKit – This set of apps based around the NKit.dll. Used to Convert and Recover GameCube and Wii images 
NKit Format
NKit has its own format. Designed around preservation and always convertible back to the source iso data. It's the smallest format and playable in Dolphin 
NKit.iso
NKit raw format. Playable in Dolphin. GameCube is playable on hardware. When externally compressed (7zip...) it's the smallest version 
NKit.gcz
NKit compressed format. Playable in Dolphin only. The GCZ container is Dolphin's own seekable compressed format. This is the smallest playable format
Conversion
The process of converting source images to output formats 
Passes
Conversion often requires multiple passes. E.g. Recover to Iso, Convert To NKit, Verify 
Processing
General term for the conversion of an image or a pass
Image
A file, iso or game being converted 
Archives
Zip, Rar, 7zip files containing an image 
Forward Only
NKit can stream images from archives (zip, rar, 7z). These formats only allow reading of files from start to end. NKit is designed and built around this
Patch
When processing images in a forward only stream. Any data to be updated in the output is patched (updated) at the end 
Checksums
Values that identify images to verify correctness and to match against dat files of known images. NKit can create CRC, MD5 and SHA1 
CRC
Used throughout NKit to validate and verify images. CRC is useful as it can be calculated in sections and combined when applying patches. This saves having to reprocess an output image to get a match
Redump
Redump is a preservation project that holds Dat files of images and their checksums. Matching these images ensures they are not corrupt 
Dat
A file of known images, sizes and checksums 
Recovery
Creating a good known Dat image from any source image. This involves fully rebuilding the image and brute forcing items (header, region, partitions) to match a Dat CRC 
Recovery Files
Files required by recovery processing. Without these files, recovery is limited to very few scenarios. Basically unscrubbing
Convert
Convert an image to and from the NKit format preserving its exact data 
Restore
Used to describe converting back from the NKit format 
Match
A processed image that matches an entry in a dat 
Valid
An image restored from NKit that matches the source image CRC 
Bad Conversion
Some unlicensed, hacked or modified images are not correct and cannot be reprocessed. They may work correctly if the bad data is never referenced. NKit can still convert and restore these images. They are called Bad Conversions because they will not run in this state 
Summary
A summary of each conversion is logged in to the Summary Log file. This should be checked when processing large batches 
Brute Force
Recovering imaged to match a dat CRC can rely on combining many possibilities together until one matches something. NKit Recovery has the ability to deduce some header variants, region and update partitions 
Preservation
Converting an image that can be verified to be restored back to the original iso data
Scrambled
Raw Wii images are known as scrambled. NKit does not support these. They must be unscrambled first 
Unscrambled
Unscrambled images are supported. Some have an extra 32k of space. NKit will detect and remove this when recovering as no Redump images have it
RVT
There are 2 types of Wii RVT images RVT-R and RVT-H. NKit supports RVT-R as source images. They are required to be iso and 7MB larger than a normal image. RVT-H is the NKit Wii format with additional info in the disc header. Dolphin has supported RVT for a while
WBFS
WBFS is a disk and file format. NKit supports the file version. It is a block removal format. Tools that create it also often remove non-game partitions also. NKit is able to recover these using recovery files
Iso.dec
A block removal format that only removed blocks containing valid junk data. This is also a preservation format. Not playable in Dolphin 
Source
Used to refer to an input image in any format 
Output
Used to refer to an output image in any format 
Hang
Used to refer to a specific type of bug that has happened in NKit due to the nature of the multithreading and internal circular buffer. Any progress bars stop moving and the app becomes idle

Disc Terms - WIP

Disc

An iso or image. For Wii or GameCube

Partition

 Update Data, Game, Channel, VC 

Junk

NonJunk

Preservation Data

NKit format data used to preserve the

Scrubbed

Truncated

Compacted


Weird Data

Disc Header

 Disc ID Number region title  

Partition

 Header 
 Data 
 ID 
 H3, Ticket, cert chain, tmd 

Group

Block

Sector

Hashes

Hash Sector

Encryption

Key

Fst

Gaps

Trailing Nulls