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Directory Header
ksherlock edited this page Apr 23, 2015
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This is the directory header, as originally defined in ProDOS/SOS.
| Name | Offset | Size |
|---|---|---|
| storage_type | $00 | 4 bits (high) |
| name_length | $00 | 4 bits (low) |
| file_name | $01 | 15 bytes |
| reserved | $10 | 8 bytes |
| creation | $18 | 4 bytes |
| version | $1c | 1 byte |
| min_version | $1d | 1 byte |
| access | $1e | 1 byte |
| entry_length | $1f | 1 byte |
| entries_per_block | $20 | 1 byte |
| file_count | $21 | 2 byte |
| parent_pointer | $23 | 2 bytes |
| parent_entry_number | $25 | 1 byte |
| parent_entry_length | $26 | 1 byte |
- SOS 1.3 and ProDOS 1.7 source code refer to the reserved data as the password enabled byte/password. Neither actually implemented password support, though.
- SOS 1.3 stores $76 in the password_enabled byte.
- ProDOS 1.7 stores $75 in the password_enabled byte. When reading a directory, the password_enabled byte MUST have 5 bits set (eg $75 or $76). Otherwise, error $4a is returned.
| Name | Offset | Size |
|---|---|---|
| storage_type | $00 | 4 bits (high) |
| name_length | $00 | 4 bits (low) |
| file_name | $01 | 15 bytes |
| password_enabled | $10 | 1 byte |
| encoded_password | $11 | 7 bytes |
| creation | $18 | 4 bytes |
| version | $1c | 1 byte |
| min_version | $1d | 1 byte |
| access | $1e | 1 byte |
| entry_length | $1f | 1 byte |
| entries_per_block | $20 | 1 byte |
| file_count | $21 | 2 byte |
| parent_pointer | $23 | 2 bytes |
| parent_entry_number | $25 | 1 byte |
| parent_entry_length | $26 | 1 byte |