SegaSonic the Hedgehog
SegaSonic the Hedgehog |
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Developer: Sega AM3[1] This game has unused graphics. This game has a prototype article This game has a prerelease article |
SegaSonic the Hedgehog was Sonic the Hedgehog, Mighty the Armadillo, and Ray the Flying Squirrel's only game together until the release of Sonic Mania Plus in 2018.
To do:
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Contents
Sub-Pages
Prototype Info |
Prerelease Info |
Unused Graphics
Title Graphics
Unused | Used |
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Early versions of the characters on the title screen, without the shine on the eyes and the nose missing/unfinished. Sonic's quills are also shaped a little different in this early version. While Sonic was seen in the prototype, Ray and Mighty were nowhere to be seen outside of the graphics data.
Player Character Graphics
Some sprites of the characters flexing their muscles, which possibly would have been used when continuing the game. The code to have these animations display in-game still exists, but doesn't appear to be used anywhere.
Unused | Used |
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Sonic had his face mercifully redrawn to look less like roadkill, while Ray got his patagia enlarged.
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Sonic got his arms reanimated, Ray had his proportions slightly corrected, and Mighty's mouth was slightly redrawn, and his eyes are now closed.
Dr. Eggman Sprites
It seems that Eggman was supposed to use some gadgets and thingamajigs himself to prevent players from reaching him. Probably meant to show up in other stages in Eggman Island more than waiting for the main character(s) to meet him at the computer room in the final level.
Unused Localization Version
Several graphics and tilemaps suggest that SegaSonic the Hedgehog was going to use elements from the franchise's American equivalent for non-Japanese exports. For whatever reason, plans for these seem to have fallen through; although SegaSonic was brought over to SegaWorld London[3], it was transparently an import.[2] Investigation by arcade digital archaeologist Suddenデス found that several tilemaps (as in, the code that displays the graphics on-screen) survived for these graphics, suggesting that this localization made it very far in development until it never found an use. The only sprites that appear to be missing are for him riding around behind the title screen, and the intro where he traps the main character(s) while riding on an Eggman-face tank. No English voice samples are present in the game's sound data.
Dr. Robotnik
A largely complete set of sprites of Robotnik, as he appeared on ABC's Sonic the Hedgehog cartoon (generally nicknamed SatAM) and early issues of Archie's Sonic comics.
Even the little details were accounted for to complete the Robotnik experience.
To use this Robotnik design instead of the original, use this MAME cheat:
<cheat desc="Robotnik Patch"> <comment>Requires reload to clear</comment> <script state="on"> <action>mainpcb:maincpu.mw@9619e=0b70</action> <action>mainpcb:maincpu.mw@96253=0b70</action> <action>mainpcb:maincpu.mw@96367=0b70</action> <action>mainpcb:maincpu.mw@964a4=0b70</action> <action>mainpcb:maincpu.mw@96197=b088</action> <action>mainpcb:maincpu.mw@9624c=b088</action> <action>mainpcb:maincpu.mw@9635e=b088</action> <action>mainpcb:maincpu.mw@963d0=b088</action> <action>mainpcb:maincpu.mw@9649a=b088</action> <action>mainpcb:maincpu.mw@963dd=b0c0</action> <action>mainpcb:maincpu.md@95c18=17235e</action> <action>mainpcb:maincpu.mb@961b1=b3</action> <action>mainpcb:maincpu.mb@96266=b3</action> <action>mainpcb:maincpu.mb@9637a=b3</action> <action>mainpcb:maincpu.mw@12b46=8b90</action> <action>mainpcb:maincpu.mw@12c35=b128</action> <action>mainpcb:maincpu.mw@12c37=b130</action> <action>mainpcb:maincpu.mw@12c39=b138</action> <action>mainpcb:maincpu.mw@12c3b=b198</action> <action>mainpcb:maincpu.mw@12c3d=b1a0</action> <action>mainpcb:maincpu.mw@12c3f=b1a8</action> <action>mainpcb:maincpu.mw@12c41=b1b0</action> <action>mainpcb:maincpu.mw@12c43=b1b8</action> <action>mainpcb:maincpu.mw@12c45=b1c0</action> <action>mainpcb:maincpu.mw@12c47=b1c8</action> <action>mainpcb:maincpu.mw@12c49=b1d0</action> <action>mainpcb:maincpu.mw@12c4b=b1d8</action> <action>mainpcb:maincpu.mw@12c4d=b1e0</action> <action>mainpcb:maincpu.mw@12c4f=b1e8</action> <action>mainpcb:maincpu.mw@12c51=b1f0</action> <action>mainpcb:maincpu.mw@14057=b000</action> <action>mainpcb:maincpu.mw@1405e=9210</action> <action>mainpcb:maincpu.mw@1426d=b000</action> <action>mainpcb:maincpu.mw@1426f=b008</action> <action>mainpcb:maincpu.mw@14271=b010</action> <action>mainpcb:maincpu.mw@14273=b018</action> <action>mainpcb:maincpu.mw@14275=b020</action> <action>mainpcb:maincpu.mw@14277=b028</action> <action>mainpcb:maincpu.mw@14279=b030</action> <action>mainpcb:maincpu.mw@1427b=b038</action> <action>mainpcb:maincpu.mw@1427d=b040</action> <action>mainpcb:maincpu.mw@1427f=b000</action> <action>mainpcb:maincpu.mw@14281=b048</action> <action>mainpcb:maincpu.mw@14283=b050</action> <action>mainpcb:maincpu.mw@14285=b058</action> <action>mainpcb:maincpu.mw@14287=b060</action> <action>mainpcb:maincpu.mw@14289=b068</action> <action>mainpcb:maincpu.mw@1428b=b070</action> <action>mainpcb:maincpu.mw@1428d=b078</action> <action>mainpcb:maincpu.mw@1428f=b080</action> <action>mainpcb:maincpu.mw@235f=aff0</action> <action>mainpcb:maincpu.mw@2366=8b50</action> <action>mainpcb:maincpu.mw@1d302=9858</action> <action>mainpcb:maincpu.md@1be67=00172aa5</action> <action>mainpcb:maincpu.mw@1d738=12a0</action> <action>mainpcb:maincpu.mw@1d731=af98</action> <action>mainpcb:maincpu.mw@1d959=af98</action> <action>mainpcb:maincpu.mw@1d95d=afa0</action> <action>mainpcb:maincpu.mw@1d961=afa8</action> <action>mainpcb:maincpu.mw@1d965=afb0</action> <action>mainpcb:maincpu.mw@1d969=afb0</action> <action>mainpcb:maincpu.mw@1da6e=0100</action> <action>mainpcb:maincpu.mw@1da75=af90</action> <action>mainpcb:maincpu.mw@1da7c=1290</action> <action>mainpcb:maincpu.mw@96cb1=9fd0</action> <action>mainpcb:maincpu.mw@96c21=b0f0</action> <action>mainpcb:maincpu.mw@96c23=0b80</action> <action>mainpcb:maincpu.mw@96c2d=b0f8</action> <action>mainpcb:maincpu.mw@96c2f=0b80</action> <action>mainpcb:maincpu.mw@96c39=b100</action> <action>mainpcb:maincpu.mw@96c3b=0b80</action> <action>mainpcb:maincpu.mw@96c45=b108</action> <action>mainpcb:maincpu.mw@96c47=0b80</action> <action>mainpcb:maincpu.mw@96c51=b110</action> <action>mainpcb:maincpu.mw@96c53=0b80</action> <action>mainpcb:maincpu.mw@96c5d=b118</action> <action>mainpcb:maincpu.mw@96c5f=0b80</action> <action>mainpcb:maincpu.mw@96c69=b120</action> <action>mainpcb:maincpu.mw@96c6b=0b80</action> </script> </cheat>
English Dialogue
A complete set of English dialogue bubbles. Interestingly, one of the bubbles has an "Eggman" variant.
To use these dialogue bubbles, use this MAME cheat. For it to work properly you have change the X in "9fX0" at line 27 of the cheat with 4 for the "Robotnik" variant of the dialogue, or with 3 for the "Eggman" variant of the dialogue.
<cheat desc="English Patch"> <comment>Requires reload to clear</comment> <script state="on"> <action>mainpcb:maincpu.mw@95772=9f90</action> <action>mainpcb:maincpu.mw@95774=0a20</action> <action>mainpcb:maincpu.mw@95776=0130</action> <action>mainpcb:maincpu.mw@95778=0018</action> <action>mainpcb:maincpu.mw@9577a=9f90</action> <action>mainpcb:maincpu.mw@9577c=0a20</action> <action>mainpcb:maincpu.mw@9577e=0130</action> <action>mainpcb:maincpu.mw@95780=0018</action> <action>mainpcb:maincpu.mw@95782=9ff8</action> <action>mainpcb:maincpu.mw@95784=0a70</action> <action>mainpcb:maincpu.mw@95786=0078</action> <action>mainpcb:maincpu.mw@95792=9f28</action> <action>mainpcb:maincpu.mw@95794=8800</action> <action>mainpcb:maincpu.mw@95796=0130</action> <action>mainpcb:maincpu.mw@95798=0020</action> <action>mainpcb:maincpu.mw@957ea=9f28</action> <action>mainpcb:maincpu.mw@957ec=8800</action> <action>mainpcb:maincpu.mw@957ef=0130</action> <action>mainpcb:maincpu.mw@957f1=0020</action> <action>mainpcb:maincpu.mw@957f2=9f28</action> <action>mainpcb:maincpu.mw@957f4=8800</action> <action>mainpcb:maincpu.mw@957f6=0130</action> <action>mainpcb:maincpu.mw@957f8=0020</action> <action>mainpcb:maincpu.mw@9579a=9fX0</action> <action>mainpcb:maincpu.mw@9579c=8800</action> <action>mainpcb:maincpu.mw@957a0=0038</action> <action>mainpcb:maincpu.mw@957a2=9f48</action> <action>mainpcb:maincpu.mw@957a4=8800</action> <action>mainpcb:maincpu.mw@957a6=0130</action> <action>mainpcb:maincpu.mw@957a8=0038</action> <action>mainpcb:maincpu.mw@85df5=0050</action> <action>mainpcb:maincpu.mw@95762=9f58</action> <action>mainpcb:maincpu.mw@95764=8800</action> <action>mainpcb:maincpu.mw@95766=0130</action> <action>mainpcb:maincpu.mw@95768=0020</action> <action>mainpcb:maincpu.mw@957c2=9f80</action> <action>mainpcb:maincpu.mw@957c4=8800</action> <action>mainpcb:maincpu.mw@957c6=0130</action> <action>mainpcb:maincpu.mw@957c8=0020</action> <action>mainpcb:maincpu.mw@957ba=9f70</action> <action>mainpcb:maincpu.mw@957bc=8800</action> <action>mainpcb:maincpu.mw@957be=0130</action> <action>mainpcb:maincpu.mw@957c0=0020</action> <action>mainpcb:maincpu.mw@957ca=a1b8</action> <action>mainpcb:maincpu.mw@957cc=8800</action> <action>mainpcb:maincpu.mw@957ce=0130</action> <action>mainpcb:maincpu.mw@957d0=0020</action> <action>mainpcb:maincpu.mw@957d2=9f78</action> <action>mainpcb:maincpu.mw@957d4=8800</action> <action>mainpcb:maincpu.mw@957d6=0130</action> <action>mainpcb:maincpu.mw@957d8=0020</action> <action>mainpcb:maincpu.mw@957da=9f70</action> <action>mainpcb:maincpu.mw@957dc=8800</action> <action>mainpcb:maincpu.mw@957de=0130</action> </script> </cheat>
Copy Protection
As with so many of Sega's arcade games at the time, SegaSonic the Hedgehog utilizes a variant of the "suicide battery" FD1149 chip on the PCB.
These custom chips are powered by a clock battery, making the replication of the chip near-impossible during the 1990s. When the battery dies/the ROMs are on a board without the chip, the game seems to operate as normal until when a run starts: the game scrolls diagonally on Icy Isle until ending with a game over, making it impossible to play.
Unused Text Strings
Attract Mode Order
Ranking Mode Title Mode Demo 1 Mode Demo 2 Mode
This is located at 0x463 in Rev. A and 0x60D in the final. The entries here correspond to the attract mode within the game.
Removed Debug Tools
Game Mode Fence Set Mode Stage Change Stg St Wait RING BINUS
Starting at 0x19F9 in Rev. A and 0x254D includes a block of strings which contain remnants of debugging tools. "RING BINUS" might've appeared below the player health icons to label the ring counter, but was probably removed due to it being a waste of space.
Final-Exclusive Strings
PLayer Select
This string only appears in the final build, at 0x27E2. This appears before code related to the character select screen, which would've made it placeholder text.
NAME ENTRY PLAYER SELECT
These strings also only appear in the final build, specifically at 0x11413E. This was placeholder text below the player icons.
Miscellaneous
These might have been used when setting to multiple coins per one credit, but they don't appear no matter what dipswitch settings are used.
A sprite viewer menu of sorts. Still exists in prototype.
References
- Games developed by Sega AM3
- Pages missing publisher references
- Games published by Sega
- Arcade games
- Games released in 1993
- Games released in October
- Pages missing date references
- Games released in 1996
- Games released in September
- Games released on September 7
- Games with unused graphics
- Games with unused text
- Games with anti-piracy methods
- To do
- Sonic the Hedgehog series
Cleanup > Pages missing date references
Cleanup > Pages missing publisher references
Cleanup > To do
Games > Games by content > Games with anti-piracy methods
Games > Games by content > Games with unused graphics
Games > Games by content > Games with unused text
Games > Games by developer > Games developed by Sega > Games developed by Sega AM3
Games > Games by platform > Arcade games
Games > Games by publisher > Games published by Sega
Games > Games by release date > Games released in 1993
Games > Games by release date > Games released in 1996
Games > Games by release date > Games released in October
Games > Games by release date > Games released in September
Games > Games by release date > Games released in September > Games released on September 7
Games > Games by series > Sonic the Hedgehog series