NuFX

Revision as of 02:55, 28 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.

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.

Specifications

• Apple II File Type Notes - ShrinkIt / NuFX
• ARCHIVE FORMATS AND DATA, by Raymond Clay, "NuFX - SHRINKIT" section

Software

• NuLib, NuLib2, NufxLib
• NuLib v3.24 (DOS software)
• Shink-Fit X - Mac OS X archiver compatible with ShrinkIt
• ShrinkIt

Sample files

• dexvert samples — archive/nuFX
• FTP Site: UMICH Software Archive → .../*.shk

Links

• NuFX format described (A2-Central, Aug. 1989)
• Hacking data compression (gives lots of format details)
• What are ShrinkIt files?