Sonic Adventure 2 (PC)/RAM Editing

SCHG: Sonic Adventure 2
Dreamcast GameCube PC
Sonic Adventure 2 (Dreamcast) Main Article Object Editing Editing Objects File Name Layout Format Special Objects Object Lists Programs Sound Editing Sound Editing Music List Voices Sound Effects Level Data Formats Locations Models Model Files Animation Files Model Formats Info Level List Character Animation IDs Character Action Lists Event List Cutscenes Textures Global Indexes Sonic Adventure 2: Battle (Gamecube) Main Article Object Editing Editing Objects File Name Layout Format Special Objects Object Lists Programs Sound Editing Sound Editing Music List Voices Sound Effects Level Data Formats Locations Models Model Files Animation Files Model Formats Info Level List Character Animation IDs Character Action Lists Event List Cutscenes Textures Global Indexes Sonic Adventure 2 (PC) Main Article Object Editing Editing Objects File Name Layout Format Special Objects Object Lists Programs Sound Editing Sound Editing Music List Voices Sound Effects Level Data Formats Locations Models Model Files Animation Files Model Formats EXE Editing EXE Editing RAM Editing RAM Editing Info Level List Character Animation IDs Character Action Lists Event List Cutscenes Textures Global Indexes

Cheat Engine is a program that enables you to edit a program's RAM while it's running. You can use this program to edit the RAM in Sonic Adventure 2, and the below cheat table file contains the addresses so you don't need to enter them manually. It also contains some additional values relating to Chao, as well as a few tweaks to enable or fix certain things.

Download SA2 Cheat Table File: SA2_Cheat_Table.zip (94 kB) (info)

Note: All values are signed, unless noted otherwise.

Global Variables

Address (hex)	Type	Description
0174AFDE	Byte	2P Mode 0 - 1 Player 1 - 2 Player (3 rounds) 2 - 2 Player (1 round)
0174B013	Byte	P1 Alternate Costume
0174B014	Byte	P2 Alternate Costume
0174B015	Byte	P1 Alternate Character
0174B016	Byte	P2 Alternate Character
0174B024	2 Bytes	Lives
0174B028	2 Bytes	P1 Rings
0174B02A	2 Bytes	P2 Rings
0174B050	4 Bytes	P1 Score
0174B05C	4 Bytes	Total Rings (Black Market)
01934B70	Byte	Current Level
01934B80	Byte	P1 Character 0 - Sonic 1 - Shadow 2 - Mechless Tails 3 - Mechless Eggman 4 - Knuckles 5 - Rouge 6 - Mech Tails 7 - Mech Eggman
01934BE4	Byte	P2 Character 0 - Sonic 1 - Shadow 2 - Mechless Tails 3 - Mechless Eggman 4 - Knuckles 5 - Rouge 6 - Mech Tails 7 - Mech Eggman

Pointer Area

The data here changes its location when the level is loaded. Use pointers to find them.

Master Object Struct

A pointer to this for P1 is at 01DEA6E0, for P2, 01DEA6E4. Length: 0x50.
These are all pointers.

Offset (hex)	Description
0	Pointer to previously loaded object in chain.
4	Pointer to next loaded object in chain.
10	Main routine
14	Display routine
34	Object Data 1
40	Object Data 2
44	Object Name

Character Object 1

Length: 0x30

Offset (hex)	Type	Description
0	Byte	Action. Each object has its own values for this.
4	2 Bytes	Status Bitfield Bit Value (hex) Description 0 1 On Ground 2 4 Hurt (setting bit causes you to take damage)
8	4 Bytes	X Rotation (BAMS)
C	4 Bytes	Y Rotation (BAMS)
10	4 Bytes	Z Rotation (BAMS)
14	Float	X Position
18	Float	Y Position
1C	Float	Z Position
20	Float	X Scale
24	Float	Y Scale
28	Float	Z Scale

Character Object 2

Length: 0x3A0

Offset (hex)	Type	Description
0	Byte	Player Number
1	Byte	Character ID 0 - Sonic/Amy 1 - Shadow/Metal Sonic 2 - Mechless Tails 3 - Mechless Eggman 4 - Knuckles/Tikal 5 - Rouge/Chaos 6 - Mech Tails/Chao Walker 7 - Mech Eggman/Dark Chao Walker 9 - Super Sonic 10 - Super Shadow
3	Byte	Character ID 2 0 - Sonic 1 - Shadow 2 - Mechless Tails 3 - Mechless Eggman 4 - Knuckles 5 - Rouge 6 - Mech Tails 7 - Mech Eggman 8 - Amy 9 - Super Sonic 10 - Super Shadow 12 - Metal Sonic 13 - Chao Walker 14 - Dark Chao Walker 15 - Tikal 16 - Chaos
10	2 Bytes	Powerups Bitfield Bit Value (hex) Description 0 1 Barrier 1 2 Magnetic Barrier 15 8000 Invincibility
24	4 Bytes	Upgrades Bitfield Bit Value (hex) Description 0 1 Sonic's Light Shoes 1 2 Sonic's Ancient Light 2 4 Sonic's Magic Gloves 3 8 Sonic's Flame Ring 4 10 Sonic's Bounce Bracelet 5 20 Sonic's Mystic Melody 6 40 Tails' Booster 7 80 Tails' Bazooka 8 100 Tails' Laser Blaster 9 200 Tails' Mystic Melody 10 400 Knuckles' Shovel Claw 11 800 Knuckles' Sunglasses 12 1000 Knuckles' Hammer Gloves 13 2000 Knuckles' Air Necklace 14 4000 Knuckles' Mystic Melody 15 8000 Super Sonic 16 10000 Shadow's Air Shoes 17 20000 Shadow's Ancient Light 18 40000 Shadow's Flame Ring 19 80000 Shadow's Mystic Melody 20 100000 Eggman's Jet Engine 21 200000 Eggman's Large Cannon 22 400000 Eggman's Laser Blaster 23 800000 Eggman's Protective Armor 24 1000000 Eggman's Mystic Melody 25 2000000 Rouge's Pick Nails 26 4000000 Rouge's Treasure Scope 27 8000000 Rouge's Iron Boots 28 10000000 Rouge's Mystic Melody
64	Float	Horizontal Speed
68	Float	Vertical Speed
C0	Struct (0x84 bytes)	Physics Data
D0	Float	Base Speed (default is 3, changes when player picks up speed shoes, etc.)