PSISOIMG0000

This format is used for PSONE Classics on PS3 and PSP.

EBOOT.PBP

Contents:

• PARAM.SFO
• ICON0.PNG
• ICON1.PMF
• PIC0.PNG
• PIC1.PNG
• SND0.AT3
• DATA.PSP
• DATA.PSAR

DATA.PSAR

• Contains the ISO (usually compressed)

Offset	Notes
0x0	PSISOIMG0000
0x400	iso header (encrypted, probably ignored by ps1_netemu)
0x1220	special data (encrypted)
0x100000	start of the iso

ISO.BIN

This file helps the PS3 to verify the content of DATA.PSAR. It is a copy of the iso header. At the end of the file, there is a signature which can be used to verify the contents. All offsets are in little endian.

Patch for disabling the signature check in ps1_netemu

set search "\xE8\x7F\x01\x80\xE9\x61\x00\x00\xE8\x0B\x00\x10\x7C\x08\x03\xA6"
set replace "\x38\x60\x00\x00"

catch_die {:: patch_elf $elf $search 0 $replace} "Unable to patch self [file tail $elf]"

• tested manually (without mfw creator)

Structure

Offset	Notes
0x0	PSISOIMG0000
0x400	iso header (decrypted)
0x4000	start of entries

Entries

• Starting at 0x4000
• Each entry represents 0x10 Sectors of the iso
• One sector has 0x930 bytes (2352 bytes)
• Sectors are compressed
• same entries can be found in the decrypted iso_header of the EBOOT.PBP

Entry Nº	Offset	Length	Name	Example	Notes
1	0x00	4 bytes (0x04)	offset in iso	0	offset relative to start of the iso inside of DATA.PSAR
	0x04	2 bytes (0x02)	size	variable	size of 0x10 sectors (compressed, if not 0x9300)
	0x06	2 bytes (0x02)	type ?	01 00	usually 1... and 0 for the last entry
	0x08	16 bytes (0x10)	sha1	variable	first 0x10 bytes of sha1 sum of 0x10 disc sectors
	0x18	8 bytes (0x08)	padding
Up to 32256					same structure than the previous entry

Extract ISOs

you can use this app to get plain isos out of the eboot.pbp: [[1]]