Sonic Adventure DX: PC/EXE Editing

This page is about various things you can edit in the sonic.exe file.
Note: There are multiple versions of SADXPC. Some addresses may not work for your version. Make sure the values given match your exe before editing it! Addresses that only work for the US version will be marked with US. Addresses that only work for the European version will be marked with EU. These are not likely to work with the Japanese version.
Note: the cracked version is the same as the European version.
Note: to find these in RAM, add $400000.

Animation Swapping

This short section needs expansion. You can help Sonic Retro by adding to it.

Sonic's Animations

List

Address (US)	Address (EU)	Description	Default (dec.)
97A88	97AD8	Landing After Falling	1
9773F	9778F	Landing After Jumping	2
916FF	9174F	Idle	4
917F9	91849	Leaning forwards	7
91807	91857	Leaning back	8
95E46	95E96	Walking 1	9
95E2C	95E7C	Walking 2	10
95BDA	95C2A	Walking 3	11
95B44	95B94	Running 1	12
95C27	95C77	Running 2	13
95C77	95CC7	Jumping/Spindashing	14
951D3	95223	Rolling	15
92FE6	93036	Light Speed Attack	15
95B97	95BE7	Springing	16
978D9	97929	After Springing	17
94FDC	9502C	Falling	18
92F7A	92FCA	Jump Cancel	18
97CC0	97D10	After Jump Dash	18
9876B	987BB	After Light Speed Attack	18
97298	972E8	Braking	20
975B3	97603	After Light Speed Dash	20
92F1C	92F6C	Hurt	23
97F4B	97F9B	Hurt Landing	24
9607F	960CF	Floating	26
93053	930A3	Light Speed Dash	64
963FF	9644F	Ladder	69
9B117	9B167	Jump Pad Flip	72
95CC7	95D17	Jump Pad Flight	73
984A3	984F3	Jump Pad Landing	74
961DB	9622B	Victory	75
96595	965E5	Frozen	82
9675C	967AC	Drowning	85
9BDC1	9BE11	Dying	87
Metal Sonic
95B3A	95B8A	Running 1	146
95BEB	95C3B	Running 2	13
95C3B	95C8B	Jumping	14
Super Sonic
96743	96793	Start	134
9A475	9A4C5	Standing from Moving	134
9A560	9A5B0	Standing from Jumping	134
9A3B8	9A408	Jump Cancel	141
9A4B6	9A506	Falling	141
9A6D6	9A726	After Jump Dash	141
9A617	9A667	After Springing	140
94D25	94D75	Springing	139
94E02	94E52	Victory	143
9A3DE	9A42E	Jumping	145

Tails' Animations

List

Address (US)	Address (EU)	Description	Default (dec.)
5C0D1	5C121	Jumping	14
5F9BB	5FA0B	Walking 1	9
5C1ED	5C23D	Wind Path	11
5C1A7	5C1F7	Spring	17
5EC9F	5ECEF	Downwards Spring	18
5CE93	5CEE3	Falling	19
5C1DA	5C22A	Floating	33
5EB5C	5EBAC	Flying	37
5C6D6	5C726	After Dash Hoop	37
5C725	5C775	Dash Hoop	41
5D702	5D752	Tail Attack	43

Knuckles' Animations

Address (US)	Address (EU)	Description	Default(dec.)
7694A	7699A	Jumping	14
7865D	786AD	Gliding 1	51
786E9	78739	Gliding 2 (used for a second glide without landing)	51
7888E	788DE	After Gliding	34

Action Swapping

This short section needs expansion. You can help Sonic Retro by adding to it.

Sonic's Actions

List

Address (US)	Address (EU)	Description	Default (dec.)
9ABE5	9AC35	Level Start	1
95063	950B3	Standing	1
94848	94898	After Hurt	1
9A83E	9A88E	Walking/Running	2
979A1	979F1	Landing and moving	2
97774	977C4	Landing and moving after rolling	2
96EFA	96F4A	Spindash	4
951C0	95210	Rolling	5
93049	93099	Light Speed Dash	6
95F11	95F61	Jumping	8
97CDB	97D2B	After Homing Attack	8
94F8F	94FDF	Falling After Rolling	8
96001	96051	Vertical Spring	9
96048	96098	Spring	10
92F6A	92FBA	Jump Cancel	12
94FD3	95023	Falling	12
97843	97893	After Vertical Spring	12
978D0	97920	After Spring	12
97CB8	97D08	After Jump Dash	12
977B9	97809	Homing Attack/Jump Dash	14
92F12	92F62	Hurt	16
963F5	96445	Ladder	38
95E99	95EE9	Jumping from first Panel	40
98547	98597	Jumping from Panel	40
9849A	984EA	Landing on Panel	41
9658D	965DD	Frozen	43
92FDC	9302C	Light Speed Attack	44
99522	99572	Running down building after falling	46
994B1	99501	Running down building after jumping	46
99393	993E3	Rolling down building	47
96353	963A3	Falling down building	48
9936B	993BB	Jumping down building	49
9B47A	9B4CA	Hit while running down building	50
9676D	967BD	Dying	86
9AA29	9AA79	Debug Mode	87
Super Sonic
9673B	9678B	Start	75
9A46D	9A4BD	Standing from Moving	75
9A558	9A5A8	Standing from Jumping	75
94E38	94E88	After hitting Perfect Chaos	75
9A404	9A454	Moving	76
9A740	9A790	Landing and Moving	76
9A3AF	9A3FF	Jump Cancel	78
9A4AE	9A4FE	Falling	78
9A6CE	9A71E	After Jump Dash	78
9A60E	9A65E	After Springing	78
94D1D	94D6D	Springing	79
9A5CD	9A61D	Homing Attack	81
9A3D6	9A426	Jumping	82
9A75F	9A7AF	After Homing Attack	82
94DFA	94E4A	Victory	20
94EC2	94F12	Dying	86

Tails' Actions

List

Address (US)	Address (EU)	Description	Default (dec.)
6186A	618BA	Level Start	1
5CF1F	5CF6F	Standing	1
5F7E9	5F839	After Tail Attack	1
5F9B3	5FA03	Walking/Running	2
5C1E3	5C233	Wind Path	3
73C29	73C79	Rolling	4
5C096	5C0E6	Jumping	6
5C19F	5C1EF	Springing	8
5CE8B	5CEDB	Falling	10
5A84A	5A89A	Jump Cancel	10
5C1D2	5C222	Floating	10
5EC97	5ECE7	Downwards Spring	10
5EB54	5EBA4	Flying	15
5C6C8	5C718	After Dash Hoop	15
5D6FA	5D74A	Tail Attack	20
5C717	5C767	Dash Hoop	61
5C2EE	5C33E	Victory/Loss	62

Physics

Locations

These are indexed by $5154E8 + (Character * $84).

Character	Address
Sonic	5154E8
Tails	5155F0
Knuckles	515674
Amy	51577C
Gamma	515800
Big	515884

Offsets

These are in the same locations as in RAM. These are all Floats except Hang Time, which is 4 Bytes, measured in frames.

Offset	Description	Sonic	Tails	Knuckles	Amy	Gamma	Big
0	Hang Time	60	60	60	60	60	60
4	Amount of grip on floor	2	1.5	2	1.5	2	2
8	Horizontal Speed Cap	16	16	16	16	16	5
C	Vertical Speed Cap	16	16	16	16	16	8
10	Something to do with the maximum speed Sonic can accelerate to on his own?	3	2	2.5	0.05	2.5	1
14	?	0.6	0.6	0.6	0.5	0.6	0.2
18	Initial Jump Speed	1.66	1.66	1.66	1.3	2	2
1C	Spring Control?	3	3	3	3	3	3
20	?	0.23	0.23	0.23	0.23	0.23	0.23
24	Rolling Cancel Speed	0.46	0.49	0.46	0.46	1	0.32
28	Rolling End Speed	1.39	1.39	1.39	1.39	2	1.39
2C	Running 1 Speed	2.3	2.8	3.1	2.3	2.5	2.3
30	Minimum speed to get knocked back when hitting a wall. Also affects pushing speed?	3.7	3.7	3.7	3.7	3.7	3.7
34	Running 2 Speed	5.1	5.1	5.1	5.1	5.1	5.1
38	While jump is held, add this to speed.	0.076	0.076	0.076	0.013	0.09	0.1
3C	Ground Acceleration?	0.05	0.06	0.05	0.045	0.06	0.08
40	Air Acceleration	0.031	0.031	0.031	0.031	0.031	0.031
44	Ground Deceleration	-0.06	-0.06	-0.06	-0.06	-0.06	-0.08
48	Brake Speed	-0.18	-0.18	-0.18	-0.18	-0.25	-0.18
4C	Air Brake Speed	-0.17	-0.17	-0.17	-0.17	-0.17	-0.17
50	Air Deceleration	-0.028	-0.028	-0.028	-0.028	-0.028	-0.028
54	Rolling Deceleration	-0.008	-0.008	-0.008	-0.008	-0.008	-0.04
58	Speed to add to normal gravity?	-0.01	-0.01	-0.01	-0.01	-0.01	-0.01
5C	Speed when Sonic hits something?	-0.4	-0.4	-0.4	-0.4	-0.4	-0.4
60	Minimum speed before stopping (affects spindash charging and braking)	-0.1	-0.1	-0.1	-0.1	-0.1	-0.1
64	Seems to affect movement on sloped surfaces	-0.6	-0.6	-0.6	-0.6	-0.6	-0.6
68	Something related to acceleration on ground? Increase it to accelerate faster. 4 Bytes.	-1097817129	-1095971635	-1095971635	-1095971635	-1083808154	-1102263091
6C	?	0.3	0.3	0.3	0.3	0.3	0.3
70	Ripple Size?	4	3.5	4	3.5	4	9.5
74	Collision Size	10	9	11.4	10	21	17
78	Gravity (Multiplied by Gravity values)	0.08	0.08	0.08	0.04	0.1	0.135
7C	Y Offset for camera	7	6	9	7	20	15
80	Y Offset	5.4	4.5	5.7	5	14	8

Other Values

Address (US)	Address (EU)	Description	Default
92FEB	9303B	Light Speed Attack V Speed	8
9306A	930BA	Light Speed Dash H Speed	8
9439D	943ED	Super Sonic's Rolling Deceleration	-0.001
943A7	943F7	Super Sonic's Air Deceleration	-0.002
943B1	94401	Super Sonic's Air Acceleration	0.05
943BB	9440B	Super Sonic's Y Offset	6.4
94C2F	94C7F	Jump Dash H Speed	5
96F23	96F73	Initial Spindash Speed	2
3DCB34	3DCB3C	Max Spindash Speed	10
3DCCFC	3DCD04	Free Movement Speed	5
3DD550	3DD540	Spindash Speed Increment	0.4
3E007C	3E006C	Water Multiplication	0.65

Text Editing

Main Article: SCHG:Sonic Adventure DX: PC/EXE Editing/Text Editing

Level Headers

Main Article: SCHG:Sonic Adventure DX: PC/EXE Editing/Level Headers

Object Lists

A pointer list is at 574AF8, containing eight entries per act. To find the pointer you want, take $574AF8 + (((level * 8) + act) * 4). Remember to subtract 0x400000 from all pointers!

Now you will be at the list header, which is actually at the end of the list. The header is simple: the first 4 Bytes are the number of objects, and the next 4 bytes are a pointer to the start of the list.

The list consists of 0x14 bytes for each object, in the following format:

Offset	Type	Description
0	Byte	First argument passed to ObjLoad
1	Byte	Second argument passed to ObjLoad
2	2 Bytes	Some setting related to the distance at which the object appears. The next value will only take effect if this is 1, otherwise the game will provide a value.
4	Float	The distance from the player at which the object appears/disappears.
8	4 Bytes	Unknown. Usually 0.
C	4 Bytes	A pointer to the main subroutine for the object.
10	4 Bytes	A pointer to the name of the object in ASCII text. Unused in the final, but used in the preview's SET Editor.

You should not edit these values unless you are absolutely sure of what you're doing, as incorrect arguments or pointers will likely crash the game. Instead, you should simply copy an entry from another level's list, and it will work as long as the proper textures are loaded.

Misc. Code

This short section needs expansion. You can help Sonic Retro by adding to it.

This section is for code that doesn't fit into any of the above sections. To disable code, replace it with nop instructions ($90)
x86 Instruction Set Reference

Address (US)	Address (EU)	Bytes	ASM	Description	Result when disabled
13D9E	13DEE	C6 05 40 EF B0 03 00	mov byte ptr [03B0EF40],00	Show the HUD	Allow hiding the HUD
25AB0	25B00	66 C7 05 E4 F0 B0 03 00 00	mov word ptr [03B0F0E4],0000	Set rings to 0 when hit	Don't lose rings when hit
25B7E	25BCE	00 1d 34 ef b0 03	add [03b0ef34],bl	add change to lives	Can't lose or gain lives
25C03	25C53	66 89 0D E4 F0 B0 03	mov [03B0F0E4],ecx	Ring collection	Collecting rings doesn't add to total. Also disables Super Sonic's ring drain.
25CC0	25D10	66 A1 E4 F0 B0 03	mov ax,[03B0F0E4]	Copy rings value when hit	Always spill 20 rings and can't die when hit
496DD	4972D	80 7b 09 06 0f 85 cf 00 00 00	cmp byte ptr [ebx+09],06 jne 497b6	Test if you're playing as E-102 Gamma, and branch if you aren't	NOP the jne, and everyone can walk on water. Replace it with a jmp, and nobody can.