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Difference between revisions of "Sonic the Hedgehog (16-bit)/Object Editing"

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Revision as of 07:37, 3 February 2010

SCHG: Sonic the Hedgehog

Object Pointer List

SS Note: Code offsets for each actual pointer were taken from the Nemesis guides; they do not all appear to be accurate, but I don't have enough skill to go back and correct them yet. Someone else may take this task up.

ID # Description Code Mappings Subparameters
01 Sonic $12BD8 $21292
02 ???? $D5B2 ?? All of these point to ObjectFall, the subroutine directly after the object table; apparently a label for a null object was made but code was never added.
03 ???? $D5B2 ??
04 ???? $D5B2 ??
05 ???? $D5B2 ??
06 ???? $D5B2 ??
07 ???? $D5B2 ??
08 LZ water splash $142F0 ??
09 Sonic in Special Stage $1B984 ??
0A Drowning countdown numbers $13C98 $14152
0B LZ vertical pole $11206 $11326

$11331

  • $00 - Unbreakable
  • $01 - Breaks in 1 Seconds
  • $02 - Breaks in 2 Seconds
  • $03 - Breaks in 3 Seconds
  • $04 - Breaks in 4 Seconds
  • $05 - Breaks in 5 Seconds
  • $06 - Breaks in 6 Seconds
0C LZ doors that open and close $11346 ?? $02
0D End of level signpost $EB28 ??
0E Sonic on the title screen $A61C ??
0F "PRESS START BUTTON" and "TM" from title screen $A69C ??
10 Blank object $1C022
11 GHZ Bridge $7328 ??
  • $06 - 6 logs
  • $07 - 7 logs
  • $08 - 8 logs
  • $09 - 9 logs
  • $0A - 10 logs
  • $0B - 11 logs
  • $0C - 12 logs
  • $0D - 13 logs
  • $0E - 14 logs
  • $0F - 15 logs
12 Spinning light behind glass from SYZ $E90C ??
13/14? Fireball from MZ/SLZ $E296 $B37A
  • $17 - Goes left to right
  • $25 - Goes top to bottom
  • $30-31, 35, 40-42 - Goes up, then comes down
  • $36 - Goes right to left
15 GHZ and MZ swinging platforms
Spiked ball on a chain (SBZ)
SLZ swinging platforms
$E304 $7C4E
$10AA6
$7C6C
16 Spear from LZ $11F04 $11FA6
  • $00 - Horizontal spear
  • $02 - Vertical spear
17 Helix of spikes on a pole from GHZ $7CA2 $7E08 $10
18 GHZ platforms
SLZ platforms
SYZ platforms
$7E32 $8140
$819C
$818A
$80FE (unused)
  • $00 - Doesn't move (GHZ)
  • $01 - Falls (GHZ)
  • $02 - Moves up and down (GHZ)
  • $05 - Moves side to side (GHZ)
  • $07 - Rises when a switch is pressed (SYZ)
  • $0A - Large GHZ platform moving up and down
  • $0B - Moves up and down (SYZ)
19 Blank object $81A8
1A Collapsible cliff from GHZ $8210 $85A8
  • $00 - Style 1
  • $01 - Style 2
1B Water surface from LZ $110C6 $11178
1C Fireball launcher from SLZ
GHZ bridge stump
$87CA $8858
  • $00 - Fireball launcher
  • $03 - Bridge stump
1D ???? $885E $891E
1E Ballhog $8B4C $8E6E
1F Crabmeat $94F0 $975E
20 Big red explosion $8C1C ????
21 SCORE, TIME, RINGS $1C548 $1C5BC
22 Buzz bomber $97DE $9A42
23 Missile that Buzz Bomber throws $9932 $9B0E
24 Explosion $8CF2 $8EAE
25 Ring $9B26 $9FA2
26 Monitor $A118 $A5A2
  • $00 - Blank
  • $01 - Robotnik
  • $02 - 1-Up
  • $03 - Speed Up
  • $04 - Shield
  • $05 - Invincible
  • $06 - Super Ring
  • $07 - S Monitor
  • $08 - Goggles
27 Normal explosion $8D62 ????
28 Freed animals $8F22 $946C
$9484
$949C
29 Points upon destroying $9412 $94BC
2A One way barrier from SBZ $8934 $89FE
2B Chopper enemy $AB20 $ABCE
2C Jaws enemy $ABDA $AC78
2D Burrobot enemy $ACA4 $AE6A
2E Contents of monitor flying up from monitor being busted $A302 ????
2F Large platforms from MZ $AEB8 $B2DA
  • $01 - Large oscillating platform
  • $15 - Platform that sinks upon being walked on
  • $20-$29 - Smaller oscillating platform
    (Speed from 0 to 9, with 0 being fastest)
30 Large glassy blocks from MZ $B39E $B600
  • $01 - Oscillating block
  • $04 - Block moves down when switch 0 pressed
  • $14 - Moves down when switch 1 pressed
31 Metal stomping blocks on chains $B67C $BB64
  • $02, $12 - Large with spikes, short chain
  • $11 - Large with spikes, long chain
  • $23 - Small with metal head
  • $80-$85: Large with spikes, raises when switch 0-5 is pressed
32 Switch $BD2E $BEAC
  • $00-$0F: Switches 0-F
33 Moveable block in MZ and LZ $BED2 $C2EA
34 Title card $C306 ????
35 Fireball that sits on the floor (MZ)
(appears when you walk on sinking platforms)
$B1DC ????
36 Spikes $CE28 $CFF4
  • $00 - Three standard spikes
  • $01 - Three moving spikes
  • $10 - Three spikes facing left
  • $12 - Three moving spikes facing left
  • $20 - One spike
  • $30 - Three widely spaced spikes
  • $40 - Six widely spaced spikes
  • $50 - One spike facing left
  • $52 - One moving spike facing left
37 Rings flying out from being hit $9CB6 ????
38 Shield and invincibility stars $14158 $143C2
39 "Game over"/"Time over" sprite $C4B8 $CBAC
3A End of level results screen $C572 ????
3B GHZ purple rock $D050 $D110
3C Breakable walls in GHZ, SLZ $D11C $D2BC
  • $00 - Left edge
  • $01 - Main part of wall
  • $02 - Right edge
3D Eggman (GHZ) $17700 $17D26
3E Egg prison $1AB22 $1AD82
3F Large explosion $8DF6 ????
40 Motobug $F61A $F7AE
41 Springs $DABE $DD26
  • $00 - Red vertical spring
  • $02 - Yellow vertical spring
  • $10 - Red spring facing left
  • $12 - Yellow spring facing left
42 Newtron enemy (GHZ) $DD68 $DF58
  • $00 - Flies along the ground
  • $01 - Fires missile, then disappears
43 Roller enemy (SYZ) $DFFA $E1AC
44 Wall barrier from GHZ $E1D4 $E256
  • $00 - Type 1 (shading at top)
  • $01 - Type 2 (regular pattern)
  • $02 - Type 3 (fully shaded)
45 Spiked metal block from beta version (MZ) $B99A $BC6C
46 Solid blocks and blocks that fall from the ceiling (MZ) $E7D0 $E906
  • $00 - Solid block
  • $01 - Wobbling block, doesn't fall
  • $02 - Wobbling block, falls
47 Pinball bumper (SYZ) $E9D0 $EB06
48 Swinging ball on a chain from GHZ boss $17AE4 $81B2
49 Waterfall sound effect $D0BE
4A Special stage entry from beta $14254 $1447C
4B Giant ring $9E06 $9FDA
4C Lava geyser / lava that falls from the ceiling trigger (MZ) $ED84 $F272
  • $01 - Falls from ceiling
  • Called by object $33 for use as geyser
4D Lava geyser / lava that falls from ceiling $EE70 ???? Triggered by object $4C
4E Advancing wall of lava (MZ) $F05E $F538
4F Blank object used for object $50
50 Yadrin enemy (SYZ) $F83A $F93A
51 Smashable green block (MZ) $FC92 $FDD8
52 Moving blocks (MZ, LZ, SBZ) $FDF8 $10054
$100A2
  • $01 - MZ block that moves back and forth
  • $02 - MZ block that moves right when stood on
  • $07 - LZ platform that appears when switch 2 is pressed
  • $28 - SBZ platform that moves up and down
  • $39 - SBZ platform that slides away
  • $41 - MZ platform that moves side to side
53 Collapsing floors (MZ, SLZ, SBZ) $8320 $874E
  • $01 - MZ/SBZ collapsing blocks
  • $81 - SLZ collapsing blocks
54 Invisible lava tag (MZ) $F1B8 $F212
55 Basaran enemy (MZ) $100A8 $10246
56 Moving blocks (SYZ/SLZ/LZ) $10286 $10710
  • $00 - SYZ Block
  • $01, 02 - SYZ Block that moves side to side
  • $13 - SYZ Block that moves up and down
  • $58-5B - SLZ Block that moves in a circle,
    moving up in circumference
57 Spiked ball on a chain $10782 $10964 Subparameters are set so the first half of the nybble sets the speed (lower is faster) and the second half determines the amount of links on the chain, starting with 2 at the 3 value.
58 Spikeball $10976 ????
  • $01 - Moves side to side
  • $02 - Moves up and down
  • $C3 - Moves in a circle
59 Raising platforms (SLZ) $10AD2 $10D4A
  • $00 - Rises when stood on
  • $01 - Rises higher when stood on
  • $03 - Falls when stood on
  • $0C - Rises diagonally when stood on
  • $8A - Series of platforms that rise and vanish
5A Platforms that move in circles (SLZ) $10D5A $10E84
  • $00-03 - First through fourth platforms moving clockwise
  • $04-07 - First through fourth platforms moving counterclockwise
5B Blocks that form a staircase (SLZ) $10E90 $1103E
  • $00 - Regular staircase
  • $02 - Staircase you need to knock down
5C Metal girders in foreground (SLZ) $11044 $11098
5D Fans (SLZ) $114FC $1161A $00-$02
5E Seesaws (SLZ) $1163C $119AC
$119EA
5F Walking bomb enemy (SLZ, SBZ) $119F6 $11C40
60 Orbinaut enemy (LZ, SLZ, SBZ) $11CCE $11EEC
  • $00 - Attacking type
  • $02 - Nonattacking type
61 Blocks (LZ) $11FD4 $121CA
  • $01 - Block that falls when stood on
  • $05 - Pushable block
  • $13 - Platform that rises
  • $30 - Block
62 Gargoyle head (LZ) $121E8 $12320 $01-$04
63 Platforms on a conveyor belt (LZ) $1233C $12686
  • $7F - Conveyor belt wheels
  • $80-85 - Tag for small platforms
64 Bubbles (LZ) $126A4 $129FA $80-82
65 Waterfalls (LZ) $12A9E $12B6C
  • $00, $07 - Vertical water
  • $02-$04, $06 - Waterfall corner
  • $08 - Diagonal water
  • $09 - Waterfall splash
  • $49 - Waterfall splash that moves up and down with water
66 Rotating disc that grabs Sonic (SBZ) $1509A $152B4
  • $00-$03 - Changes direction when switches 0 through 3 are pressed
67 Disc that you run around (SBZ)
(Small object; actual disc is in level tiles)
$154E2 $15688 $40
68 Conveyor belts (SBZ)
(Small object; actual belt is in level tiles)
???? ????
  • $20 - Belt going left
  • $E0 - Belt going right
69 Spinning platforms and trapdoors (SBZ) $15730 $158E6
$15944
  • $01, $02 - Trapdoor
  • $80-$83 - Spinning platform
  • $90-$9F - Spinning platform
6A Ground and ceiling saws (SBZ) $1597C $15BA0
  • $01 - Ceiling saw, moves sideways
  • $02 - Ceiling saw, moves up and down
  • $03 - Ground saw
6B Stomper and platforms (SBZ) $15C12 $15F72
  • $13, 24, 34 - Stomper
  • $80-88 - Doors opened by switches 0-8
6C Vanishing platforms (SBZ) $15FF8 $16132 $00, $40, $80, $C0, $C6, $E6
6D Flame thrower (SBZ) $E4E0 $E620 $43
6E Electrocution orbs (SBZ) $16146 $161EC
  • $02, $04, $06, $08 - Various speeds, lower is faster
6F Spinning platforms that move around a conveyor belt (SBZ) $1626A ???? $80-$85
70 Large girder block (SBZ) $1652A $1662A
71 Invisible solid blocks $1141A $114BC Various
72 Teleporter (SBZ) $16668 ???? $00-$08
73 Eggman (MZ) $18230 ????
74 Lava that Eggman drops (MZ) $186A4 ????
75 Eggman (SYZ) $190EE ????
76 Blocks that Eggman picks up (SYZ) $19692 $19808
77 Eggman (LZ) $17E36 ????
78 Caterkiller enemy (MZ, SBZ) $16934 $16D9E
79 Lamppost $16E2E $17100 $00-$09 - Posts 0 through 9
7A Eggman (SLZ) $188B8 ????
7B Exploding spikeys that the SLZ boss drops $18CCE $190E2
7C Special stage entry effect $9ED6 $A084
7D Hidden points at the end of a level $1715E $17250
  • $01 - 1,000 points
  • $02 - 100 points
  • $03 - 10 points
7E Special stage results screen $C7AE ????
7F Chaos Emeralds from the special stage results screen $C956 $CE02
80 Continue screen $4E42 $5066
81 Sonic on the continue screen $4F5C ????
82 Eggman (SBZ2) $19832 ????
83 Blocks that disintegrate when Eggman presses a switch $19B60 $19D1C
84 Cylinders Eggman hides in (FZ) $1A44E $1A68E
85 Eggman (FZ) $19D58 $1A3DE
86 Energy balls/launcher (FZ) $1A7DA $1AA5E
$1AABC
87 Sonic on the ending sequence $53E2 $5690
88 Chaos Emeralds on the ending sequence $553C $5788
89 "SONIC THE HEDGEHOG" text on the ending sequence $5616 $57B4
8A "SONIC TEAM PRESENTS" and credits $17264 $172F8
8B Robotnik on the "TRY AGAIN" and "END" screens $59E2 $5BCC
8C Chaos Emeralds on the "TRY AGAIN" screen $5AC2 ????

Mappings Editing

Each mapping is 5 bytes long, taking the form TTTT TTTT 0000 WWHH PCCY XAAA AAAA AAAA LLLL LLLL.

  • LLLL LLLL is the left co-ordinate of where the mapping appears.
  • TTTT TTTT is the top co-ordinate of where the mapping appears.
  • WW is the width of the mapping, in tiles minus one. So 0 means 8 pixels wide, 1 means 16 pixels wide, 2 means 24 pixels wide and 3 means 32 pixels wide.
  • HH is the height of the mapping, in the same format as the width.
  • P is the priority-flag. If P is set, the mapping will appear above everything else.
  • CC is the palette line.
  • X is the x-flip-flag. If X is set, the mapping will be flipped horizontally.
  • Y is the y-flip-flag. If Y is set, the mapping will be flipped vertically.
  • AAA AAAA AAAA is the tile index.

The VRAM offset specified in an object's SST will be added to the PCCY XAAA AAAA AAAA word.

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