NuFX
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{{FormatInfo | {{FormatInfo | ||
|subcat=Archiving | |subcat=Archiving | ||
| − | |extensions={{ext|bxy}} | + | |extensions={{ext|shk}}, {{ext|sdk}}, {{ext|bxy}} |
| + | |pronom={{PRONOM|fmt/850}} | ||
| + | |wikidata={{wikidata|Q25305144}}, {{wikidata|Q29167432}}, {{wikidata|Q60558754}} | ||
|released=1989 | |released=1989 | ||
}} | }} | ||
| + | '''NuFX''' (NuFile Exchange; also known as '''ShrinkIt''' format) is an archiving format that was used for the Apple II series late in its history. It was created by Andy Nicholas as a student project at Moravian College in Bethlehem, Pennsylvania. The [[ShrinkIt]] program (also created by Nicholas) supports it. It usually uses [[LZW]] compression. | ||
| − | ''' | + | The usual filename extension is '''.shk'''. When NuFX-format data is placed into [[Binary II]] format for transfer, extension '''.bxy''' is used. |
| + | |||
| + | NuFX also supports storing disk images. Files using this feature typically have extension '''.sdk'''. | ||
| + | |||
| + | == Format details == | ||
| + | Two slightly different CRC algorithms are used, by different parts of the format: [[CRC-16#CRC-16/XMODEM|CRC-16/XMODEM]] and [[CRC-16#CRC-16/IBM-3740|CRC-16/IBM-3740]]. | ||
| + | |||
| + | == Identification == | ||
| + | NuFX files start with bytes {{magic|4e f5 46 e9 6c e5}}. This is ASCII "<code>NuFile</code>", but with the high bit set on alternate bytes. | ||
| + | |||
| + | == Specifications == | ||
| + | * [https://nulib.com/library/FTN.e08002.htm Apple II File Type Notes - ShrinkIt / NuFX] | ||
| + | * [https://gswv.apple2.org.za/a2zine/GS.WorldView/Resources/The.MacShrinkIt.Project/ARCHIVES.TXT ARCHIVE FORMATS AND DATA, by Raymond Clay], "NuFX - SHRINKIT" section | ||
| + | |||
| + | == Software == | ||
| + | * [https://nulib.com/index.htm NuLib, NuLib2, NufxLib] | ||
| + | * [{{SACFTPURL|pack|ibmnulib.zip}} NuLib v3.24] (DOS software) | ||
| + | * [https://www.callapple.org/software/an-a-p-p-l-e-review-shink-fit-x-for-mac-os-x/ Shink-Fit X] - Mac OS X archiver compatible with ShrinkIt | ||
| + | * [[ShrinkIt]] | ||
| + | * {{Deark}} (limited features) | ||
| + | |||
| + | == Sample files == | ||
| + | * {{DexvertSamples|archive/nuFX}} | ||
| + | * [https://archive.org/details/2013.06.13.www.umich.edu FTP Site: UMICH Software Archive] → .../*.shk | ||
== Links == | == Links == | ||
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* [http://www.fadden.com/techmisc/hdc/lesson09.htm Hacking data compression] (gives lots of format details) | * [http://www.fadden.com/techmisc/hdc/lesson09.htm Hacking data compression] (gives lots of format details) | ||
* [http://apple2.org.za/gswv/a2zine/faqs/Csa2FLUTILS.html#002 What are ShrinkIt files?] | * [http://apple2.org.za/gswv/a2zine/faqs/Csa2FLUTILS.html#002 What are ShrinkIt files?] | ||
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| + | [[Category:Disk Image Formats]] | ||
[[Category:Apple II series]] | [[Category:Apple II series]] | ||
Latest revision as of 18:04, 29 December 2023
NuFX (NuFile Exchange; also known as ShrinkIt format) is an archiving format that was used for the Apple II series late in its history. It was created by Andy Nicholas as a student project at Moravian College in Bethlehem, Pennsylvania. The ShrinkIt program (also created by Nicholas) supports it. It usually uses LZW compression.
The usual filename extension is .shk. When NuFX-format data is placed into Binary II format for transfer, extension .bxy is used.
NuFX also supports storing disk images. Files using this feature typically have extension .sdk.
Contents |
[edit] Format details
Two slightly different CRC algorithms are used, by different parts of the format: CRC-16/XMODEM and CRC-16/IBM-3740.
[edit] Identification
NuFX files start with bytes 4e f5 46 e9 6c e5. This is ASCII "NuFile", but with the high bit set on alternate bytes.
[edit] Specifications
- Apple II File Type Notes - ShrinkIt / NuFX
- ARCHIVE FORMATS AND DATA, by Raymond Clay, "NuFX - SHRINKIT" section
[edit] Software
- NuLib, NuLib2, NufxLib
- NuLib v3.24 (DOS software)
- Shink-Fit X - Mac OS X archiver compatible with ShrinkIt
- ShrinkIt
- Deark (limited features)
[edit] Sample files
[edit] Links
- NuFX format described (A2-Central, Aug. 1989)
- Hacking data compression (gives lots of format details)
- What are ShrinkIt files?
