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The file DOR length is up to 64 bytes. Its layout is fixed and should respect the specified order. It contains father, brother and son followed by file informations consisting of a key, data length, data.
| Offset | Length | Name | Value | Description |
|---|---|---|---|---|
| $00 | 3 | pointer to father | ||
| $03 | 3 | pointer to brother | ||
| $06 | 3 | pointer to son | ||
| $09 | 1 | DN_ | DOR minor type (DN_Fil, DN_Dir, DN_Epr) | |
| $0A | 1 | $3F | file DOR length | |
| $0B | 1 | DT_NAM | 'N' | name section descriptor |
| $0C | 1 | $11 | filename length, fixed value | |
| $0D | 17 | Filename null terminated, cell filled with trailing zero. Includes dot and extension. Filename of 1 to 12 characters, a dot, 3 characters extension, a null terminator. | ||
| $1E | 1 | DT_UPD | 'U' | update timestamp section descriptor |
| $1F | 1 | $06 | update time length, fixed value | |
| $20 | 6 | date and time of update in machine format | ||
| $26 | 1 | DT_CRE | 'C' | creation timestamp section descriptor |
| $27 | 1 | $06 | creation time length, fixed value | |
| $28 | 6 | date and time of creation in machine format | ||
| $2E | 1 | DT_EXT | 'X' | extent (size) |
| $2F | 1 | $04 | extent length, fixed value | |
| $30 | 4 | 32 bit value of filesize | ||
| $34 | 1 | DT_EFS | 'E' | section descriptor |
| $35 | 1 | $04 | section length, fixed value | |
| $36 | 4 | 32 bit pointer to eprom file entry | ||
| $3A | 1 | DT_ATR | 'A' | section descriptor |
| $3B | 1 | $03 | section length, fixed value | |
| $3C | 3 | 24 bit for file attribute flags system flag (protecting shell commands) is bit 23, others are reserved |