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Directory Header

ksherlock edited this page 2015-04-23 11:36:44 -04:00

Table of Contents

• Updates

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

Updates

• 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