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
0174AFDB	Byte	Minutes on clock
0174AFDC	Byte	Seconds on clock
0174AFDE	Byte	2P Mode 0 - 1 Player 1 - 2 Player (3 rounds) 2 - 2 Player (1 round)
0174AFDF	Byte	2P Level Category 1 - Level 1 (Mini Stage) 2, 3, 4 - Levels 2-4 (Normal)
0174AFED	Array of Bytes (3 bytes)	P1 2P Special Moves
0174AFF0	Array of Bytes (3 bytes)	P2 2P Special Moves
0174AFF7	Byte	Time Stop Activator 0 - inactive 1 - stops player 1 2 - stops player 2
0174AFF8	Byte	Sunglasses/Treasure Scope
0174AFFE	Byte	Controls Active
0174B004	Byte	Chao Key collected
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
01934BE0	Byte	Menu Mode (some level swaps horribly crash) 0 - inactive 1 - loading sequence 2 - reloads level item cloner 3 - reloads level combine levels 4 - returns to menu 5 - reload character?!? 6 - returns to menu 7 - level just finished loading 8 - fades to menu (exit?) 9 - restarts level no lost life 10 - fades to menu (exit) 11 - fades to menu (exit) 12 - restart level 13 - normal restart 14 - fades to menu (normal exit) 15 - return ring 16 - in-game level is fully loaded 17 - pause menu 18 - leftover memory card error ("slot %s") 19 - returns to menu
01934BE4	Byte	P2 Character 0 - Sonic 1 - Shadow 2 - Mechless Tails 3 - Mechless Eggman 4 - Knuckles 5 - Rouge 6 - Mech Tails 7 - Mech Eggman
01A5A678,01A5A67C	Byte	Cannon's Core Freeze Duration
01D7BB10	4 Bytes	Current Menu 0 - Title Screen 1 - Main Menu 2 - Story Select 3 - Stage Select 4 - 2P Dreamcast 5 - Story Mode 6 - Settings 7 - PAL TV Settings 8 - Sound Test 9 - File Select (from Title Screen) 10 - Kart Racing 11 - Download Event 12 - Boss Attack 13 - Tutorial 15 - Emblem Results 16 - 2P Battle 21 - Controls 22 - Bonus Video 23 - How to Play 24 - File Select (from Settings)
01D7BB14	4 Bytes	Current Menu State
01D9442C	2 Bytes	Kart Race Time
01D96F48	Byte	Have Boost (Route 101/280)
01DE4664	Byte	P1 Lighting (0 through 255)
01DE94A0	Float	X Gravity
01DE94A4	Float	Y Gravity
01DE94A8	Float	Z Gravity
01DEC628	4 Bytes	Emblem Results Time (Stops increasing after collecting 180 emblems)
01DEC62C	4 Bytes	Play Time

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

Common Values

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
4	Array of Bytes (8 bytes)	Items in Action Window
C	Byte	Number of Items in Action Window
10	2 Bytes	Powerups Bitfield Bit Value (hex) Description 0 1 Barrier 1 2 Magnetic Barrier 15 8000 Invincibility
12	Byte	Hang Time
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.)
174	Byte	Animation Frames
176,178,17A	2 Bytes	Current Animation

Sonic

Length: 0x3A0

Offset (hex)	Type	Description
35C	Byte	Homing Attack Timer
364	Byte	Homing Range Timer