Difference between revisions of "Sonic the Hedgehog CD/MMD Tweaking"

Latest revision as of 15:50, 24 March 2020

SCHG: Sonic the Hedgehog CD
Main Article
File Locations
File Locations
Art Editing
Editing Art Nemesis Format Art MMDs, A-P Palmtree Panic MMDs Collision Chaos MMDs Tidal Tempest MMDs Quartz Quadrant MMDs Wacky Workbench MMDs Stardust Speedway MMDs Metallic Madness MMDs MMDs, S-W
MMD Tweaking
Tweaking MMDs Maximum rings allowed Minimum rings for Giant Ring Rings given by ring Rings given by Ring Monitor Invincibility duration Super Sneakers duration Regular speed stats Super Sneakers speed stats
RAM Editing
RAM Editing

Here are some locations in a European Sonic CD level MMD which contain tweakable code (in Motorola 68000 assembly).

Maximum rings allowed

$AEFA:
	move.w	($FF1512).l,d1	; Move number of rings into d1
	cmpi.w	#$3E8,d1	; Compare $3E8 (1000) with d1 (number of rings)
	bcs.s	loc_20AF10	; If the number of rings is < 1000, branch
	move.w	#$3E7,d1	; Move $3E7 (999) into d1
	move.w	d1,($FF1512).l	; Move d1 back to the address where the number of rings is at

Minimum rings for Giant Ring

$D50C:
	cmpi.w	#$32,($FF1512).l	; Compare 50 with the number of rings
	bcc.s	loc_20D51C	; If number of rings >= 50, allow entrance to the special stage.
	jmp	sub_20788C	; Otherwise jump here

Rings given by ring

$9F1A:
	addq.w	#1,($FF1512).l	; Add 1 to number of rings

Rings given by Ring Monitor

$A88E:
	addi.w	#$A,($FF1512).l	; Add 10 to the current number of rings

Invincibility duration

$A8F8:
	move.b	#1,($FF151F).l	; Enable invicibility
	move.w	#$4B0,($FFFFD032).w	; Set the invincibility duration time to $4B0

Super Sneakers duration

$A95A:
	move.b	#1,($FF1520).l	; Enable super sneakers
	move.w	#$4B0,($FFFFD034).w	; Set the super sneakers duration time to $4B0

Regular speed stats

$4082:
	move.w	#$600,($FFFFF760).w	; Maximum velocity
	move.w	#$C,($FFFFF762).w	; Maximum acceleration

Super Sneakers speed stats

$A968:
	move.w	#$C00,($FFFFF760).w	; Set maximum velocity to $C00
	move.w	#$18,($FFFFF762).w	; Set maximum acceleration to $18

References

Sonic Community Hacking Guide
General
SonED2 Manual \| Subroutine Equivalency List
Game-Specific
Sonic the Hedgehog (16-bit) \| Sonic the Hedgehog (8-bit) \| Sonic CD (prototype 510) \| Sonic CD \| Sonic CD (PC) \| Sonic CD (2011) \| Sonic 2 (Simon Wai prototype) \| Sonic 2 (16-bit) \| Sonic 2 (Master System) \| Sonic 3 \| Sonic 3 & Knuckles \| Chaotix \| Sonic Jam \| Sonic Jam 6 \| Sonic Adventure \| Sonic Adventure DX: Director's Cut \| Sonic Adventure DX: PC \| Sonic Adventure (2010) \| Sonic Adventure 2 \| Sonic Adventure 2: Battle \| Sonic Adventure 2 (PC) \| Sonic Heroes \| Sonic Riders \| Sonic the Hedgehog (2006) \| Sonic & Sega All-Stars Racing \| Sonic Unleashed (Xbox 360/PS3) \| Sonic Colours \| Sonic Generations \| Sonic Forces
Technical information
Sonic Eraser \| Sonic 2 (Nick Arcade prototype) \| Sonic CD (prototype; 1992-12-04) \| Dr. Robotnik's Mean Bean Machine \| Sonic Triple Trouble \| Tails Adventures \| Sonic Crackers \| Sonic 3D: Flickies' Island \| Sonic & Knuckles Collection \| Sonic R \| Sonic Shuffle \| Sonic Advance \| Sonic Advance 3 \| Sonic Battle \| Shadow the Hedgehog \| Sonic Rush \| Sonic Classic Collection \| Sonic Free Riders \| Sonic Lost World
Legacy Guides
The Nemesis Hacking Guides	The Esrael Hacking Guides
ROM: Sonic 1 \| Sonic 2 \| Sonic 2 Beta \| Sonic 3 Savestate: Sonic 1 \| Sonic 2 Beta/Final \| Sonic 3	Sonic 1 (English / Portuguese) \| Sonic 2 Beta (English / Portuguese) \| Sonic 2 and Knuckles (English / Portuguese)
Move to Sega Retro
Number Systems (or scrap) \| Assembly Hacking Guide \| 68000 Instruction Set \| 68000 ASM-to-Hex Code Reference \| SMPS Music Hacking Guide \| Mega Drive technical information

@@ Line 4: / Line 4: @@
 ==Maximum rings allowed==
-<asm>$AEFA:
+<syntaxhighlight lang="asm">$AEFA:
  move.w ($FF1512).l,d1 ; Move number of rings into d1
  cmpi.w #$3E8,d1 ; Compare $3E8 (1000) with d1 (number of rings)
@@ Line 12: / Line 12: @@
 ==Minimum rings for Giant Ring==
-<asm>$D50C:
+<syntaxhighlight lang="asm">$D50C:
  cmpi.w #$32,($FF1512).l ; Compare 50 with the number of rings
  bcc.s loc_20D51C ; If number of rings >= 50, allow entrance to the special stage.
@@ Line 18: / Line 18: @@
 ==Rings given by ring==
-<asm>$9F1A:
+<syntaxhighlight lang="asm">$9F1A:
  addq.w #1,($FF1512).l ; Add 1 to number of rings</syntaxhighlight>
 ==Rings given by Ring Monitor==
-<asm>$A88E:
+<syntaxhighlight lang="asm">$A88E:
  addi.w #$A,($FF1512).l ; Add 10 to the current number of rings</syntaxhighlight>
 ==Invincibility duration==
-<asm>$A8F8:
+<syntaxhighlight lang="asm">$A8F8:
  move.b #1,($FF151F).l ; Enable invicibility
  move.w #$4B0,($FFFFD032).w ; Set the invincibility duration time to $4B0</syntaxhighlight>
 ==Super Sneakers duration==
-<asm>$A95A:
+<syntaxhighlight lang="asm">$A95A:
  move.b #1,($FF1520).l ; Enable super sneakers
  move.w #$4B0,($FFFFD034).w ; Set the super sneakers duration time to $4B0</syntaxhighlight>
 ==Regular speed stats==
-<asm>$4082:
+<syntaxhighlight lang="asm">$4082:
  move.w #$600,($FFFFF760).w ; Maximum velocity
  move.w #$C,($FFFFF762).w ; Maximum acceleration</syntaxhighlight>
 ==Super Sneakers speed stats==
-<asm>$A968:
+<syntaxhighlight lang="asm">$A968:
  move.w #$C00,($FFFFF760).w ; Set maximum velocity to $C00
  move.w #$18,($FFFFF762).w ; Set maximum acceleration to $18</syntaxhighlight>
+==References==
+<references />
 {{SCHGuides}}
-[[Category:Sonic Community Hacking Guide]]

SCHG

Difference between revisions of "Sonic the Hedgehog CD/MMD Tweaking"

From Sonic Retro

Latest revision as of 15:50, 24 March 2020

Maximum rings allowed

Minimum rings for Giant Ring

Rings given by ring

Rings given by Ring Monitor

Invincibility duration

Super Sneakers duration

Regular speed stats

Super Sneakers speed stats

References