DOS3 File System

### Boot sector

Sectors $01-$09 is boot sector.
$0A-$0F are empty.

### Directory

$10-$17 are directory. I don't know what's first entry, containing $0E empty bytes and $7F $A5 at the end (for MD) and $57 $A5 for SD.

Offset | Description
--- | ---
$00 | Flags
| bit 0 | Unknown
| bit 1 | Unknown
| bit 2 | Unknown
| bit 3 | Unknown
| bit 4 | Unknown
| bit 5 | Unknown
| bit 6 | Unknown
| bit 7 | Unknown
$01-$08 | Filename (padded by spaces)
$09-$0B | Extension (padded by spaces)
$0C | Number of blocks (8 sectors)
$0D | Starting block
$0E-$0F | Length of file in bytes

### FAT

Sector $18 is FAT. Maximum number of blocks that could be allocated is $7F.

- $FF - can't be allocated
- $FE - free
- $FD - eof
- other - link to other block

This format is just guessed. Back (c) 1998-2004 Jindroush Last modified: Sun Dec 5 19:28:22 1999