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Difference between revisions of "Extend the water tables in Sonic 2"

From Sonic Retro

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==Hg disassembly==
 
==Hg disassembly==
This is somewhat similar.
+
Now with 90% more easy!
  
 
First, find WaterHeight, which should look like this:
 
First, find WaterHeight, which should look like this:
Line 121: Line 121:
 
<asm>
 
<asm>
 
WaterHeight:
 
WaterHeight:
         dc.w  $600, $600; 0  ; EHZ
+
         dc.w  $600, $600       ; 0  ; EHZ
         dc.w  $600, $600; 1
+
         dc.w  $600, $600       ; 1
         dc.w  $600, $600; 2  ; WZ
+
         dc.w  $600, $600       ; 2  ; WZ
         dc.w  $600, $600; 3
+
         dc.w  $600, $600       ; 3
         dc.w  $600, $600; 4  ; MTZ
+
         dc.w  $600, $600       ; 4  ; MTZ
         dc.w  $600, $600; 5  ; MTZ3
+
         dc.w  $600, $600       ; 5  ; MTZ3
         dc.w  $600, $600; 6  ; WFZ
+
         dc.w  $600, $600       ; 6  ; WFZ
         dc.w  $600, $600; 7  ; HTZ
+
         dc.w  $600, $600       ; 7  ; HTZ
         dc.w  $600, $600; 8  ; HPZ
+
         dc.w  $600, $600       ; 8  ; HPZ
         dc.w  $600, $600; 9
+
         dc.w  $600, $600       ; 9
         dc.w  $600, $600; $A  ; OOZ
+
         dc.w  $600, $600       ; $A  ; OOZ
         dc.w  $600, $600; $B  ; MCZ
+
         dc.w  $600, $600       ; $B  ; MCZ
         dc.w  $600, $600; $C  ; CNZ
+
         dc.w  $600, $600       ; $C  ; CNZ
         dc.w  $600, $710; $D  ; CPZ
+
         dc.w  $600, $710       ; $D  ; CPZ
         dc.w  $600, $600; $E  ; DEZ
+
         dc.w  $600, $600       ; $E  ; DEZ
         dc.w  $410, $510; $F  ; ARZ
+
         dc.w  $410, $510       ; $F  ; ARZ
         dc.w  $600, $600; $10 ; SCZ
+
         dc.w  $600, $600       ; $10 ; SCZ
 
     endif
 
     endif
 
</asm>
 
</asm>
 
 
Done. Wasn't that easy?
 
Done. Wasn't that easy?
  

Revision as of 14:47, 2 February 2013

(Original guide by Dani)

If you have tried to add water to a zone ID between $00 and $07, you may have noticed strange effects with the water, such as the entire level filling with water or no water showing up at all (only the water line). To correct this problem, several changes need to be done to your disassembly. (This guide will use the Xenowhirl 2007 Sonic 2 disassembly; other disassemblies may vary.)

Xenowhirl's 2007 disassembly

First, find the section marked loc_402C and find the following line: <asm> subi.w #$800,d0</asm>

and either comment it out or delete it entirely.

Next, locate the following: <asm> WaterHeight:

   dc.w  $600, $600, $600, $600
   dc.w  $600, $600, $600, $600
   dc.w  $600, $600, $600, $710
   dc.w  $600, $600, $410, $510

</asm>

and change it to: <asm>WaterHeight:

   dc.w  $600, $600; EHZ
   dc.w  $600, $600; Zone 01
   dc.w  $600, $600; WZ
   dc.w  $600, $600; Zone 03
   dc.w  $600, $600; MZ
   dc.w  $600, $600; MZ3
   dc.w  $600, $600; WFZ
   dc.w  $600, $600; HTZ
   dc.w  $600, $600; HPZ
   dc.w  $600, $600; Zone 09
   dc.w  $600, $600; OOZ
   dc.w  $600, $600; MCZ
   dc.w  $600, $600; CNZ
   dc.w  $600, $710; CPZ
   dc.w  $600, $600; DEZ
   dc.w  $410, $510; ARZ
   dc.w  $600, $600; SCZ</asm>

Next, in the section marked DynamicWater, locate the following line: <asm> subi.w #$800,d0</asm>

and either comment it out or delete it entirely.

Next, locate this section: <asm>Dynamic_water_routine_table:

   dc.w DynamicWaterNull - Dynamic_water_routine_table; 0
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 3
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 4
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 5
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 6
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 7
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 8
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 9
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 10
   dc.w DynamicWaterCPZ2 - Dynamic_water_routine_table; 11 ; the only one that does anything
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 12
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 13
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 14
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 15</asm>

and replace the section with: <asm>Dynamic_water_routine_table:

   dc.w DynamicWaterNull - Dynamic_water_routine_table; EHZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; EHZ2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 01-1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 01-2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; WZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; WZ2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 03-1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 03-2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; MZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; MZ2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; MZ3
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 05-2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; WFZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; WFZ2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; HTZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; HTZ2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; HPZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; HPZ2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 09-1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; 09-2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; OOZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; OOZ2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; MCZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; MCZ2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; CNZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; CNZ2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; CPZ1
   dc.w DynamicWaterCPZ2 - Dynamic_water_routine_table; CPZ2 ; the only one that does anything
   dc.w DynamicWaterNull - Dynamic_water_routine_table; DEZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; DEZ2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; ARZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; ARZ2
   dc.w DynamicWaterNull - Dynamic_water_routine_table; SCZ1
   dc.w DynamicWaterNull - Dynamic_water_routine_table; SCZ2</asm>

Once these changes have been made, you will be able to add water to any zone in Sonic the Hedgehog 2. If you run into any problems, please let me know and/or get it working and edit this article.

Hg disassembly

Now with 90% more easy!

First, find WaterHeight, which should look like this: <asm> WaterHeight: dc.w $600, $600 ; HPZ dc.w $600, $600 ; Zone 9 dc.w $600, $600 ; OOZ dc.w $600, $600 ; MCZ dc.w $600, $600 ; CNZ dc.w $600, $710 ; CPZ dc.w $600, $600 ; DEZ dc.w $410, $510 ; ARZ

   endif

</asm> Change it to this: <asm> WaterHeight:

       dc.w  $600, $600        ; 0   ; EHZ
       dc.w  $600, $600        ; 1
       dc.w  $600, $600        ; 2   ; WZ
       dc.w  $600, $600        ; 3
       dc.w  $600, $600        ; 4   ; MTZ
       dc.w  $600, $600        ; 5   ; MTZ3
       dc.w  $600, $600        ; 6   ; WFZ
       dc.w  $600, $600        ; 7   ; HTZ
       dc.w  $600, $600        ; 8   ; HPZ
       dc.w  $600, $600        ; 9
       dc.w  $600, $600        ; $A  ; OOZ
       dc.w  $600, $600        ; $B  ; MCZ
       dc.w  $600, $600        ; $C  ; CNZ
       dc.w  $600, $710        ; $D  ; CPZ
       dc.w  $600, $600        ; $E  ; DEZ
       dc.w  $410, $510        ; $F  ; ARZ
       dc.w  $600, $600        ; $10 ; SCZ
   endif

</asm> Done. Wasn't that easy?


SCHG How-To Guide: Sonic the Hedgehog 2 (16-bit)
Fixing Bugs
Fix Demo Playback | Fix a Race Condition with Pattern Load Cues | Fix Super Sonic Bugs | Use Correct Height When Roll Jumping | Fix Jump Height Bug When Exiting Water | Fix Screen Boundary Spin Dash Bug | Correct Drowning Bugs | Fix Camera Y Position for Tails | Fix Tails Subanimation Error | Fix Tails' Respawn Speeds | Fix Accidental Deletion of Scattered Rings | Fix Ring Timers | Fix Rexon Crash | Fix Monitor Collision Bug | Fix EHZ Deformation Bug | Correct CPZ Boss Attack Behavior | Fix Bug in ARZ Boss Arrow's Platform Behavior | Fix ARZ Boss Walking on Air Glitch | Fix ARZ Boss Sprite Behavior | Fix Multiple CNZ Boss Bugs | Fix HTZ Background Scrolling Mountains | Fix OOZ Launcher Speed Up Glitch | Fix DEZ Giant Mech Collision Glitch | Fix Boss Deconstruction Behavior | Fix Speed Bugs | Fix 14 Continues Cheat | Fix Debug Mode Crash
Design Choices
Remove the Air Speed Cap | Disable Floor Collision While Dying | Modify Super Sonic Transformation Methods & Behavior | Enable/Disable Tails in Certain Levels | Collide with Water After Being Hurt | Retain Rings When Returning at a Star Post | Improve the Fade In\Fade Out Progression Routines | Fix Scattered Rings' Underwater Physics | Insert LZ Water Ripple Effect | Restore Lost CPZ Boss Feature | Prevent SCZ Tornado Spin Dash Death | Improve ObjectMove Subroutines | Port S3K Rings Manager | Port S3K Object Manager | Port S3K Priority Manager | Edit Level Order with ASM‎ | Alter Ring Requirements in Special Stages | Make Special Stage Characters Use Normal DPLCs | Speed Up Ring Loss Process | Change spike behaviour in Sonic 2
Adding Features
Create Insta-kill and High Jump Monitors | Create Clone and Special Stage Monitors | Port Knuckles
Sound Features
Expand Music Index to Start at $00 | Port Sonic 1 Sound Driver | Port Sonic 2 Clone Driver | Port Sonic 3 Sound Driver | Expand the Music Index to Start at $00 (Sonic 2 Clone Driver Version) | Play Different Songs Per Act
Extending the Game
Extend the Level Index Past $10 | Extend the Level Select | Extend Water Tables | Add Extra Characters | Free Up 2 Universal SSTs