ISO 9660: Difference between revisions
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Added flags and time field formats along with a basic step-by-step 'loading a file' guide. |
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ISO 9660 is not a complex file system, but has a few quirks that are worth remembering. It seems that some operating systems also create non-compliant CD's, so beware! The main example of this is the character set that is available for file names. Strictly, this consists of A-Z (upper case only!), digits and underscores. Many operating systems also allow lower case letters and other characters. Linux's [[VFS]] displays lower case filenames to the user despite the cd contents actually containing upper case characters.
Another (perhaps little-known and little-
=== Sector Size ===
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When starting out with a basic CD, we are going to be interested in the Primary Volume Descriptor, which points us to the root directory and path tables, which both allow us to find any file on the CD. Using the path table is ideal for minimal implementations which do not wish to search the directory
=== Volume Descriptor Set Terminator ===
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| 12 || 2 || Second from 0 to 59.
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| 16 || 1 || Offset from GMT in 15 minute intervals from -48 (West) to +52 (East)
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