hfs-boot/README.md

hfs-boot

GS/OS Boot block + loader for HFS

See releases for a bootable disk image.

Limitations:

• Boot volume must use 512 byte allocation blocks (ie, max size is 32MB. This limit should be removed at some point)
• All file data / catalog data needs to be in the first 3 extents (no overflow extent checking)
• 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.

More Information:

• Inside Macintosh: Files, Chapter 2 - File Manager
• Technical Note TN1150 - HFS Plus Volume Format