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5.1.1 Creating segmented disk-images
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This article is from the Apple ][ Emulator Resources Guide, by Alex Maddison with numerous contributions by others.
5.1.1 Creating segmented disk-images
The largest obstacle to creating a disk- image is storing the resulting file prior to transfer. Unless you own a 3.5" drive, hard-drive or have enough RAM on your Apple to store the file, then segmenting the disk-image will permit its storage over multiple volumes. This is useful, for example, in reading a 5.25" disk in Slot 6 Drive 1 and storing it in two (or more) parts on disks in Slot 6 Drive 2. "DSK2FILE v4.4" by Ron Kneusel <rkneusel@post.its.mcw.edu> offers segmentation as an option. It will automatically prompt for a ProDOS pathname and filename prior to start and halfway through the operation, thus creating two files. The "CHOP" application (for MSDOS and Macintosh, C source code for Unix) by the same author can be used to reassemble the disk-image on other platforms. Alternatively, "Diskread" by Damon J. Rand <D.Rand@cantva.canterbury.ac.nu>, is a DOS 3.3 BASIC application which allows the user to specify start and end tracks for segmentation (useful for varying the size of output files). Similarly, the DOS 3.3 program "Diskdump" by David A. Curran <curran@titan.ucs.umass.edu> will segment a DOS 3.3 disk into eight binary files over two disks. The resulting files from both programs can be rejoined by using the "copy" command under MSDOS or concatenated by any usual method for binary files on any platform (check the documentation for further details).
PROGRAM LOCATIONS: ftp://kreeft.intmed.mcw.edu/Q/pub/apple2/dsk2file/4.0/ (PC executable) http://keaggy.intmed.mcw.edu/dsk2file.html (WWW access to FTP site) ftp://ftp.apple.asimov.net/pub/apple_II/utility/diskread.bscftp://ftp.uu.net/systems/apple2/unix/diskdump.aaf.Z
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