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Format

Apple Partition Map ISO 9660 Hybrid

Summary

Name
Apple Partition Map ISO 9660 Hybrid
Identifiers
PUID: fmt/1741
Format type
Aggregate
Description
Apple Partition Map ISO 9660 Hybrid is a hybrid to describing the contents and structure of Apple Partition Map (APM) partition scheme and ISO9660 file system for optical disc media. The hybrid system allows for ISO9660 as a primary volume descriptor and an Apple Partition Map, allowing the disc to work on different types of computers. Apple Partition Map was developed by Apple in around 1988 with the introduction of Macintosh II. ISO 9660 was written by International Organization for Standardization (ISO) and considered an international technical standard available for many operating systems. A disk image is a uncompressed copy of the contents of a disk or a folder, it can facilitate certain types of backup and recovery strategies. Please see ID: fdd000348 from Library of Congress and other links attached to this entry for further information.
Note
http://fileformats.archiveteam.org/wiki/Apple_Partition_Map https://www.loc.gov/preservation/digital/formats/fdd/fdd000348.shtml https://en.wikipedia.org/wiki/Apple_Disk_Image https://en.wikipedia.org/wiki/Optical_disc_image https://en.wikipedia.org/wiki/ISO_9660
File extensions
toast, iso, cdr
Source
The Church of Jesus Christ of Latter-Day Saints / The Church of Jesus Christ of Latter-Day Saints

Relationships

Has priority over

Internal signatures

Apple Partition Map ISO 9660 Hybrid, sig n.1

Note
BOF; Offset: 32768; Max Offset: 70468; Magic Bytes: wildcard bytes between 0 to 16 bytes, followed by 0x45520200, an exact 508 wildcard bytes followed by 0x504D4344303031, then wildcard bytes between 1 to 16384, followed by 0xFF4344303031

Byte sequences

Min Frag Length
Absolute from BOF
Offset
32768
Max offset
70468
Byte Sequence
{0-16}45520200{508}504D4344303031{1-16384}FF4344303031
Endianness
None

Apple Partition Map ISO 9660 Hybrid, sig n.2

Note
BOF; Offset: 32768; Max Offset: 70468; Magic Bytes: wildcard bytes between 0 to 16 bytes, followed by 0x45520800, an exact 2044 wildcard bytes followed by 0x504D4344303031, then wildcard bytes between 1 to 16384, followed by 0xFF4344303031

Byte sequences

Min Frag Length
Absolute from BOF
Offset
32768
Max offset
70468
Byte Sequence
{0-16}45520800{2044}504D4344303031{1-16384}FF4344303031
Endianness
None

Changelog

  • Added in V108

    Release date
    5 September 2022

    Apple Partition Map ISO 9660 Hybrid: Signature researched and samples provided by The Church of Jesus Christ of Latter-day Saints.

    Apple Partition Map ISO 9660 Hybrid: Full entry added. Submitted by The Church of Jesus Christ of Latter-day Saints.