AVR-DOS max

nisse · Joined: 14 Dec 2006 Posts: 50

Hi
Anyone know what the maximum number of files are in the root of an SD card for AVR-DOS to be able to handle?
And maximum file size for a text file to open for append?

oe9vfj · Joined: 17 Jun 2004 Posts: 269 Location: Austria, Hard

Hi,

in the root-directory of a FAT16, you have a maximum of 512 directory entrys. This limit is defined in the Partition Boot sector. In a FAT16 subdirectory there is a limit of 65535 (2^16 - 1) entries. This Limit depends of the type of the directory entry pointer used in AVR-DOS and can not be increased.

On a FAT32 Partition you have in all kind of directories (Root and Sub) the limit of 65535 entries like the FAT16 Subdirectory.

Please take into account, that long-File-Name Entries will use more than one Directory-Entry depending on the length of the file-name.
So if you use a card with files created on a PC, there a normally more Directory Entries used, than the count of file names.