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Difference between revisions of "Sonic 3D: Flickies' Island/Technical information"

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(Updated level header data. NOTE: I'm assuming this from what I got in Green Grove 1's header. Should be the same for all headers, but maybe I missed something =/)
(B plane mappings -> Floor mappings. I only see floor tiles pointed by this data (and some extra garbage).)
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|4 bytes
 
|4 bytes
 
|Pointer
 
|Pointer
|B Plane Mappings.
+
|Floor mappings.
 
|RNC
 
|RNC
 
|-
 
|-
Line 40: Line 40:
 
|4 bytes
 
|4 bytes
 
|Pointer
 
|Pointer
|A Plane Mappings.
+
|More mappings?
 
|N/A
 
|N/A
 
|-
 
|-

Revision as of 00:27, 8 December 2008

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This is the Sonic Community Hacking Guide for the Mega Drive version of Sonic 3D: Flickies' Island.

Level headers

Level headers are 42 bytes each. They contain data needed to load their layout, objects, etc. Below is the format for a level header. N/A means that we yet don't know its functionality, however looking at their values it seems like them all are pointers. If a question mark (?) is in the description, then the content isn't confirmed yet. All palettes pointers are indices from some array.

Offset Size Type Description Compression
$0 4 bytes Pointer Object Placement RNC
$4 4 bytes Pointer Collision Level Layout / Sonic Start Position (?) RNC
$8 4 bytes Pointer Floor mappings. RNC
$C 4 bytes Pointer Graphics. N/A
$10 4 bytes Pointer More mappings? N/A
$14 4 bytes Pointer N/A N/A
$18 4 bytes Pointer Graphical Level Layout (?) N/A
$1C 4 bytes Pointer N/A N/A
$20 4 bytes Pointer Collision Level Layout / Sonic Start Position (?) N/A
$24 2 bytes N/A Unused? (always $0000) N/A
$26 1 byte Index 1st palette None
$27 1 byte Index 2nd palette None
$28 1 byte Index 3rd palette None
$29 1 byte Index 4th palette None

Level headers locations

Those are the addresses for the headers of all the levels in the game. They point to the beginning of the header data, of course.

Offset Description
$1AB62 Green Grove Zone Act 1
$1AB8C Green Grove Zone Act 2
$1ABB6 Green Grove Zone Act 3
$1AC5E Rusty Ruin Zone Act 1
$1AC34 Rusty Ruin Zone Act 2
$1AC88 Rusty Ruin Zone Act 3
$1ADAE Spring Stadium Zone Act 1
$1ADD8 Spring Stadium Zone Act 2
$1AE02 Spring Stadium Zone Act 3
$1ACB2 Diamond Dust Zone Act 1
$1ACDC Diamond Dust Zone Act 2
$1AD06 Diamond Dust Zone Act 3
$1AD5A Volcano Valley Zone Act 1
$1AD30 Volcano Valley Zone Act 2
$1AD84 Volcano Valley Zone Act 3
$1ABE0 Gene Gadget Zone Act 1
$1AC0A Gene Gadget Zone Act 2
$1AE2C Gene Gadget Zone Act 3
$1AE80 Panic Puppet Zone Act 1
$1AE56 Panic Puppet Zone Act 2
$1AEAA Panic Puppet Zone Act 3
$1AED4 The Final Fight
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