Versions Compared

Key

  • This line was added.
  • This line was removed.
  • Formatting was changed.

...

Anchor10040501004050 FAT12 / FAT16 / FAT32 Anchor10040511004051The earliest version of FAT, the file system integrated into MS-DOS, is now called FAT12, so-called because each cluster address in the File Allocation Table is 12 bits long. This limits disk size to approximately 32 MB. Extensions to 16- and 32-bit addresses (i.e., FAT16 and FAT32), expand support to 2 GB and 8 TB, respectively. Anchor10041011004101  

...

FAT version

...

...

Pointer size (Table entry size)

...

Max. size of disk

...

Free cluster marker

...

Damaged cluster marker

...

...

End of cluster chain marker

...

...

FAT12

...

...

12 bits

...

32 MB

...

0

...

0xff7

...

0xff8

...

...

FAT16

...

16 bits

...

...

2 GB

...

0

...

...

0xfff7

...

0xfff8

...

...

FAT32

...

32 bits

...

...

8 TB

...

...

0

...

0x0fff fff7

...

...

0x0fff fff8

Anchor10041021004102In µC/FS, you can enable support for FAT12, FAT16 and FAT32 individually: this means that you can enable only the FAT version that you need for your embedded system (see Appendix EAppendix E, “μC/FS Configuration” on page 497. Anchor10041061004106

FAT32 introduced some innovations: Anchor10041071004107

...