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GS/OS Boot block + loader for HFS

See releases for a bootable disk image.


  • All file data / catalog data needs to be in the first 3 extents (no overflow extent checking)
  • Boot volume must use 512 byte allocation blocks (ie, max size is 32MB. This limit should be removed at some point)
  • The HFS FST caches the volume block count before GS/OS knows what it is. This causes display issues in Finder, etc. This could be fixed by the FST using the volume size information from the Master Directory Block or GS/OS querying the device block count sooner. (current release disk image includes an hfs.fst with a volume size based on the MDB.)

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