Sonic the Hedgehog 2 (Nick Arcade prototype)/Technical information
From Sonic Retro
Revision as of 16:46, 10 November 2006 by Scarred Sun (talk | contribs) (Added palette info, tabled compressed art)
Revision as of 16:46, 10 November 2006 by Scarred Sun (talk | contribs) (Added palette info, tabled compressed art)
Level order information - 35A8 Sprite location mapping - 40090 02502 - Pallet pointers 035A8 - Level select level order 04620 - Pointer to collision indexes 0579A - Level size array 10AF8 - Animation script (Sonic) 1BFEC - Main level load block 1C05C - Pattern load cues offset index 1C09C - Pattern load cues 20000 - Curve and resistance mapping (identical to S1..) 20100 - Curve and resistance mapping 20200 - Collision Array (identical to S1..) 22200 - Collision Array
Palettes
| Offset | Description |
|---|---|
| $245A | SEGA Foreground |
| $25A2 | SEGA Background |
| $2622 | Title Screen |
| $26A2 | Level Select |
| $2722 | Sonic and Tails |
| $2742 | Green Hill Zone |
| $27A2 | ??? |
| $2822 | ??? |
| $2840 | Chemical Plant Zone? |
| $2882 | Emerald Hill Zone |
| $28E2 | Hidden Palace Zone |
| $2942 | Hill Top Zone |
| $29A2 | (Sonic again?) |
| $2A22 | Labyrinth Zone |
| $2A82 | Scrap Brain Zone Act 3 |
| $2B02 | Labyrinth Zone Sonic Underwater |
| $2B22 | Scrap Brain Zone Act 3 Sonic Underwater |
| $2B42 | Special Stage Title Card (S1) |
| $2BC2 | Continue - Sonic (S1) |
| $2BE2 | Continue (S1) |
| $2C02 | Sonic - Ending (S1) |
Compressed Art, Nemesis Format
Documented by ICEknight and Quickman.
| Offset | Description |
|---|---|
| $09DF8E | Shield |
| $09E114 | Invincibility stars |
| $0A0960 | SEGA logo |
| $0A1520 | Title Screen graphics |
| $0A2E82 | Sonic & Tails at the Title Screen |
| $0A39C6 | GHZ bit of flower (S1) |
| $0A3A10 | GHZ & MZ platform with chain (S1) |
| $0A3B2A | EHZ Log bridge |
| $0A3C16 | Unused 16x16 block (S1) |
| $0A3C5E | GHZ rolling ball (S1) |
| $0A3DFC | GHZ rolling log with spikes (S1) |
| $0A4010 | GHZ unused spikes around the rolling log (S1) |
| $0A413C | GHZ rock (S1) |
| $0A426A | GHZ breakable wall (S1) |
| $0A4308 | Some GHZ wall (S1) |
| $0A4368 | Unknown fire |
| $0A44A0 | Unused, possible burning log |
| $0A45AE | Waterfall |
| $0A46B4 | Unused HTZ fireballs |
| $0A4802 | GHZ Log bridge (S1) |
| $0A48DA | HTZ crossing platform |
| $0A4BCE | HTZ automatic door |
| $0A4C46 | HTZ seesaw with green ball |
| $0A4DDE | HPZ bridge |
| $0A4F56 | HPZ waterfalls |
| $0A52B8 | HPZ big emerald |
| $0A552A | Unknown blocks |
| $0A55EA | HPZ glowing orb |
| $0A5826 | Some platform |
| $0A59C0 | UNKNOWN unused dust |
| $0A5AE0 | CPZ floating platform |
| $0A5C2E | Water surface |
| $0A5D9E | Button |
| $0A5E76 | Vertical spring |
| $0A5F92 | Horizontal spring |
| $0A605C | Diagonal springs |
| $0A6230 | Score/Rings/Time HUD |
| $0A6338 | Lives HUD |
| $0A644E | Rings |
| $0A6542 | Monitors |
| $0A696C | Vertical spikes |
| $0A69BC | Gathered points |
| $0A6A96 | Prototype checkpoint |
| $0A6B3C | Prototype end of level sign |
| $0A6F8A | Crocodile |
| $0A732C | EHZ Buzz Bomber |
| $0A7512 | HPZ Bat |
| $0A7868 | OOZ Octopus |
| $0A7B88 | Triceratops |
| $0A7F84 | HPZ Dinobot |
| $0A835A | Unused sideways piranha |
| $0A8852 | OOZ Prototype seahorses |
| $0A8CA0 | Unused rolling ball |
| $0A8F36 | Unused Mother Bubbler |
| $0A9162 | Unused Bubbler |
| $0A9384 | EHZ Snail |
| $0A9580 | Prototype Crawler |
| $0A9902 | EHZ Piranha |
| $0A9B0E | Boss ship |
| $0AA24A | CPZ Prototype boss |
| $0AA7A8 | Big explosion |
| $0AAE30 | Robotnik's ship boost |
| $0AAEAE | Puff of smoke |
| $0AAF94 | EHZ Boss |
| $0AB780 | EHZ Boss helicopter blades |
| $0AB874 | SBZ Ball Hog (S1) |
| $0ABC34 | Crabmeat |
| $0AC122 | GHZ Buzz Bomber (S1) |
| $0AC4C8 | Possible unknown explosion from the ground |
| $0AC6B0 | LZ Burrobot (S1) |
| $0ACD9A | GHZ Piranha (S1) |
| $0AD002 | LZ Jaws (S1) |
| $0AD28C | SYZ Roller (S1) |
| $0AD7B0 | GHZ Motobug (S1) |
| $0ADA3A | GHZ Newtron (S1) |
| $0AE058 | SYZ Snail (S1) |
| $0AE440 | MZ Bat (S1) |
| $0AE73C | Splats (S1) |
| $0AE984 | SLZ Bomb (S1) |
| $0AEC1C | LZ Orbinaut (S1) |
| $0AEDFA | MZ Catakiller (S1) |
| $0AEF88 | Title card (S1) |
| $0AF596 | Explosions |
| $0AFBFC | GAME OVER, TIME OVER |
| $0AFD8E | Vertical spring |
| $0AFE90 | Sideways spring |
| $0AFF6C | Big ring flash |
| $0B00E0 | End of level hidden bonuses (S1) |
| $0B03E2 | Sonic at Continue screen + Continue star (S1) |
| $0B0692 | CONTINUE + Minisonic (S1) |
| $0B08CC | Bunny |
| $0B0A24 | Chicken |
| $0B0B80 | Penguin |
| $0B0CFC | Seal |
| $0B0E18 | Pig |
| $0B0F4E | Flicky |
| $0B1088 | Squirrel |
| $0B2184 | EHZ graphics |
| $0B5784 | HTZ graphics |
| $0B6BAA | HTZ placeholders for animated tiles |
| $0C0492 | HPZ graphics |
| $0C31A0 | HPZ glowing orbs |
| $0CC8F4 | CPZ graphics |
| $0CFDC0 | UNKNOWN |
| $0D8C34 | GHZ graphics (S1) |
| $0DC1F0 | GHZ graphics (S1) |
| $0E0B62 | Ending scene additional graphics (S1) |
| $0E0DEA | Credits font (S1) |
| $0E13E8 | SONIC THE HEDGEHOG ending text (S1) |
level layout =-=-=-=-=-=-=-= htz act2: 29DD0 final zone - 295CE hpz - 2CDDE, 2ADDE =-=-=-=-=-=-=-= level begin =-=-=-=-=-=-=-= --------------------- Sonic Starting points --------------------- GHZ Act 1 - 5948 First level loaded (EHZ act 1) - 33D2 Second level loaded (EHZ act 2) - BCE0 10AF8 - Animation script (Sonic) ============================================================= level select level order: 35A8 00 = GHZ 01 = lZ (loads CPZ art) 02 = CPZ (MZ Music) 03 = EHZ (SLZ music) 04 = HPZ (SYZ music) 05 = HTZ (SBZ music) 06 = FZ (HTZ art) (crashes) 07 = Special stage? (crashes) 08 = (crashes) 09 = (crashes) 0A = (crashes) 0B = (crashes) 0C = (illegal instuction error) 0D = (crashes) 0E = (crashes) 0F = (crashes) 10 = (crashes) ============================================================= PATTERN LOAD CUES OFFSET INDEX: 1C05C [$40 BYTES LONG] [00] STANDARD1: $1C09C [01] STANDARD2: $1C0AC [02] ???: $1C0D0 [03] GAME/TIME OVER: $1C0D8 [04] GHZ1: $1C0E0 [05] GHZ2: $1C118 [06] LZ1: $1C120 (CPZ DUPLICATE) [07] LZ2: $1C134 (CPZ DUPLICATE) [08] CPZ1: $1C120 [09] CPZ2: $1C134 [0A] EHZ1: $1C14E [0B] EHZ2: $1C186 [0C] HPZ1: $1C1A6 [0D] HPZ2: $1C1D8 [0E] HTZ1: $1C20A [0F] HTZ2: $1C254 [10] FZ1: $1C26E [11] FZ2: $1C276 [12] ???: $1C2AE [13] ???: $1C2C2 [14] ???: $1C2C2 [15] ???: $1C2C4 [16] ???: $1C2D2 [17] ???: $1C2E0 [18] ???: $1C2EE [19] ???: $1C2FC [1A] ???: $1C30A [1B] ???: $1C318 [1C] ???: $1C31A [1D] ???: $1C31C [1E] ???: $1C31E [1F] ???: $1C320 MAIN LEVEL LOAD BLOCK (IN SONIC 1 FORMAT!): $1BFEC 00: GREEN HILL ZONE GHZ 8X8 ART: 0D8C34 GHZ 16X16 MAPPINGS: 0D7E34 GHZ 128X128 MAPPINGS: 0DD850 PALLET: $04 SONG: $81 PATTERN LOAD CUES USED: $04, $05 01: LABERYNTH PLANT ZONE CPZ 8C8 ART: 0CC8F4 CPZ 16X16 MAPPINGS: 0CB314 CPZ 128X128 MAPPINGS: 0CFE34 PALLET: $05 SONG: $82 PATTERN LOAD CUES USED: $06, $07 02: CHEMICAL PLANT ZONE CPZ 8C8 ART: 0CC8F4 CPZ 16X16 MAPPINGS: 0CB314 CPZ 128X128 MAPPINGS: 0CFE34 PALLET: $06 SONG: $83 PATTERN LOAD CUES USED: $08, $09 03: EMERALD HILL ZONE EHZ 8X8 ART: 0B2184 EHZ 16X16 MAPPINGS: 0B11E4 EHZ 128X128 MAPPINGS: 0B6EB2 PALLET: $07 SONG: $84 PATTERN LOAD CUES USED: $0A, $0B 04: HIDDEN PALACE ZONE HPZ 8X8 ART: 0C0492 HPZ 16X16 MAPPINGS: 0BEEB2 HPZ 128X128 MAPPINGS: 0C3314 PALLET: $08 SONG: $85 PATTERN LOAD CUES USED: $0C, $0D 05: HILL TOP ZONE HTZ 8X8 ART: 0B2184 HTZ 16X16 MAPPINGS: 0B11E4 HTZ 128X128 MAPPINGS: 0B6EB2 PALLET: $09 SONG: $86 PATTERN LOAD CUES USED: $0E, $0F 00: ENDING? GHZ 8X8 ART: 0D8C34 GHZ 16X16 MAPPINGS: 0D7E34 GHZ 128X128 MAPPINGS: 0DD850 PALLET: $13 SONG: $86 PATTERN LOAD CUES USED: NONE