5

File Entry

ksherlock edited this page 2015-04-23 11:46:14 -04:00

Table of Contents

• Updates
• Fields
• storage_type

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

Updates

• The version/min_version fields 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

Fields

storage_type

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.