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5.1.3 Creating shrunk disk-images




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This article is from the Apple ][ Emulator Resources Guide, by Alex Maddison with numerous contributions by others.

5.1.3 Creating shrunk disk-images

"Shrunk" disk-images were not originally intended for use with emulators, being a type of NuFX archive created by ShrinkIt. As opposed to a standard .SHK file which usually contains files, an .SDK file contains a whole compressed disk (for archival or transfer purposes). This can be extracted to a disk-image under MSDOS or Unix using "Nulib" by Andy McFadden <fadden@uts.amdahl.com> - and as such, is a better method than creating a standard disk-image, since the .SDK file is compressed for faster transfer. "Nulib" outputs a ProDOS order disk-image. Although any version of ShrinkIt can create shrunk disk archives, it is preferable to use ShrinkIt 3.0 and above (hence using a 128K //e, //c or IIGS) since earlier versions (such as IIPLUS Shrinkit) don't prompt for a disk-image title within the archive. Without a title, "Nulib" cannot extract the (nameless) image from the .SDK archive.

PROGRAM LOCATIONS: http://www.jurai.org/~funaho/emulators/XGS/nulib324.zip (PC compile version 3.24) ftp://ftp.apple.asimov.net/pub/apple_II/utility/nulib.zip (PC compile version 3.03) ftp://apple2.caltech.edu/pub/apple2/ARCHIVERS/nulib324.tar.Z (Unix source) ftp://ftp.apple.asimov.net/pub/apple_II/utility/shrinkit34.sdk

 

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