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File Entry
ksherlock edited this page Apr 23, 2015
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This is the file entry, 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 |
| file_type | $10 | 1 byte |
| key_pointer | $11 | 2 bytes |
| blocks_used | $13 | 2 bytes |
| EOF | $15 | 3 bytes |
| creation | $18 | 4 bytes |
| version | $1c | 1 byte |
| min_version | $1d | 1 byte |
| access | $1e | 1 byte |
| aux_type | $1f | 2 bytes |
| last_mod | $21 | 4 bytes |
| header_pointer | $25 | 2 bytes |
- The
version/min_versionfields were deprecated and replaced with filename case information as of IIgs System 5. Refer to GS/OS Technote #8
| Name | Offset | Size |
|---|---|---|
| storage_type | $00 | 4 bits (high) |
| name_length | $00 | 4 bits (low) |
| file_name | $01 | 15 bytes |
| file_type | $10 | 1 byte |
| key_pointer | $11 | 2 bytes |
| blocks_used | $13 | 2 bytes |
| EOF | $15 | 3 bytes |
| creation | $18 | 4 bytes |
| file_name_case_bits | $1c | 2 bytes |
| access | $1e | 1 byte |
| aux_type | $1f | 2 bytes |
| last_mod | $21 | 4 bytes |
| header_pointer | $25 | 2 bytes |
The storage type is stored in the high 4 bits. Valid values are:
| $01 | Seedling File |
|---|---|
| $02 | Sapling File |
| $03 | Tree File |
| $04 | Apple II Pascal Area |
| $05 | Extended File |
| $0D | Directory |
| $0E | Subdirectory Key Block |
| $0F | Volume Key Block |
Type 0x04 and 0x05 were not a part of the original ProDOS specification and are not supported under ProDOS 8. Refer to ProDOS Technote #25
Types 0x0E and 0x0F are not used in the File Entry.