Difference between revisions of "Extend the water tables in Sonic 2"
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==Hg disassembly== | ==Hg disassembly== | ||
| − | + | Near the top of s2.asm, you should see the following: | |
| − | + | <asm>useFullWaterTables = 0 | |
| − | + | ; | If 1, zone offset tables for water levels cover all level slots instead of only slots 8-$F | |
| − | <asm> | + | ; | Set to 1 if you've shifted level IDs around or you want water in levels with a level slot below 8</asm> |
| − | + | Simply change the 0 to 1 and you're done. You can then use the WaterHeight table inbetween the lines "if useFullWaterTables" and "else", which has slots for all the levels. | |
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| − | </asm> | ||
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{{S2Howtos}} | {{S2Howtos}} | ||
[[Category:SCHG How-tos|Extend the water tables in Sonic 2]] | [[Category:SCHG How-tos|Extend the water tables in Sonic 2]] | ||
Revision as of 14:48, 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
Near the top of s2.asm, you should see the following: <asm>useFullWaterTables = 0
- | If 1, zone offset tables for water levels cover all level slots instead of only slots 8-$F
- | Set to 1 if you've shifted level IDs around or you want water in levels with a level slot below 8</asm>
Simply change the 0 to 1 and you're done. You can then use the WaterHeight table inbetween the lines "if useFullWaterTables" and "else", which has slots for all the levels.