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Cancelled SegaSonic game SegaSonic Bros. (1992) found Found by guy who found and dumped the popcorn machine thing

#256 User is offline biggestsonicfan 

Posted 05 December 2018 - 03:17 AM

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View Postgold lightning, on 05 December 2018 - 01:58 AM, said:

It's as real as can be.

:v: Mods feel free to trash this post because I am garbage.

#257 User is offline Neo Hazard 

Posted 05 December 2018 - 04:46 AM

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Just in case you were wondering, the Special Stage music is in the game, it starts up at level 40. Dunno what's past that since 46 is currently my max. Kinda hard to make out, but here's where some footage of it playing.

#258 User is offline Neo 

Posted 05 December 2018 - 05:18 AM

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That's really interesting -- considering how the instruments sound identical to the S3 track (save for the DAC, anyway) it's quite likely that the pool of music Iizuka mentioned in the Sonic Jam strategy guide was already in SMPS format, ready to be thrown in the game. This was not obvious to me until now.

#259 User is offline GerbilSoft 

Posted 05 December 2018 - 11:06 AM

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As a technical sidenote: Sonic 3 uses the SMPS Z80 sound driver. SegaSonic Bros, which runs on System C2, can't use SMPS Z80 because there is no Z80 on System C2.
This post has been edited by GerbilSoft: 05 December 2018 - 11:06 AM
Reason for edit: +sound

#260 User is offline saintminya 

Posted 05 December 2018 - 12:18 PM

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This actually looks fun! Even better is that the music is a blast too!

#261 User is offline Black Squirrel 

Posted 05 December 2018 - 12:37 PM

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That's quite the musical find. The main theme isn't too bad either, but the rest are a bit bleh.


This seems to be a common theme with 2D Sega arcade games from the early 90s - clearly all the musical talent was being diverted to the Model 1/2 games.

#262 User is online Jason 

Posted 05 December 2018 - 12:56 PM

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It still surprises me how much we think ends up on the cutting room floor actually ends up in the recycling bin. That's fucking crazy.

#263 User is offline Clownacy 

Posted 05 December 2018 - 02:38 PM

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View PostGerbilSoft, on 05 December 2018 - 11:06 AM, said:

As a technical sidenote: Sonic 3 uses the SMPS Z80 sound driver. SegaSonic Bros, which runs on System C2, can't use SMPS Z80 because there is no Z80 on System C2.


Huh. So it's an SMPS 68k driver with FM drums. Neat.

EDIT: Or it's just ADPCM, derp. Still, ADPCM support is interesting.
This post has been edited by Clownacy: 05 December 2018 - 02:41 PM

#264 User is offline Pengi 

Posted 05 December 2018 - 02:40 PM

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View Postevilhamwizard, on 05 December 2018 - 01:29 AM, said:

A magical fairy dropped this off.

Music rip (including tracks that go unreferenced in the sound test)

There's a nice surprise in there. :)/>/>


I don't really know much about music, the correct terminology and such, but bits of track 85 sound a lot like the Sonic Jam credits theme to me. It's not 1:1 or anything.

https://www.youtube....RdCIuiouo&t=19s

What do you guys reckon?
This post has been edited by Pengi: 05 December 2018 - 03:13 PM

#265 User is offline GerbilSoft 

Posted 05 December 2018 - 02:42 PM

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View PostClownacy, on 05 December 2018 - 02:38 PM, said:

View PostGerbilSoft, on 05 December 2018 - 11:06 AM, said:

As a technical sidenote: Sonic 3 uses the SMPS Z80 sound driver. SegaSonic Bros, which runs on System C2, can't use SMPS Z80 because there is no Z80 on System C2.


Huh. So it's an SMPS 68k driver with FM drums. Neat.

Either FM or ADPCM; this would need further investigation.

System C2 has an NEC uPD7759 ADPCM chip, which can be used to play one sample at a time. Most C2 games that have samples use the ADPCM chip instead of the YM DAC, since using the YM DAC would take up too much CPU time.

#266 User is offline nineko 

Posted 05 December 2018 - 04:39 PM

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I think that the only appropriate response to track $8B is "OMFG".

And I never posted in this topic before. But this, wow.

#267 User is offline Shalpp 

Posted 05 December 2018 - 05:24 PM

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View PostPengi, on 05 December 2018 - 02:40 PM, said:

View Postevilhamwizard, on 05 December 2018 - 01:29 AM, said:

A magical fairy dropped this off.

Music rip (including tracks that go unreferenced in the sound test)

There's a nice surprise in there. :)/>/>/>/>


I don't really know much about music, the correct terminology and such, but bits of track 85 sound a lot like the Sonic Jam credits theme to me. It's not 1:1 or anything.

https://www.youtube....RdCIuiouo&t=19s

What do you guys reckon?


I think Sega was just in a pick and choose to reuse mood in the 80's and 90's
Let's not forget the first stage from Quartet that LITERALLY got used as It Doesn't Matter (1:12)

This post has been edited by Shalpp: 05 December 2018 - 05:25 PM

#268 User is offline RyogaMasaki 

Posted 05 December 2018 - 08:24 PM

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I'm out of the country visiting family, so I can't disassemble the code right now, but I'm playing around with it in the debugger for now. Here's a quick MAME cheat to set the gameply level:
  <cheat desc="Set Level">
    <parameter min="0" max="255" step="1"/>
    <script state="change">
      <action>[email protected]=param</action>
    </script>
  </cheat>



edit: Here's another to set your next drop to be a Chaos Emerald
  <cheat desc="Set next drop to Chaos Emerald">
    <script state="on">
      <action>[email protected]=0808</action>
    </script>
  </cheat>



edit2: P1 score is the dword at 0xe0b0e6. When this maxes out at (decimal) 9999990, you "beat the game" by maxing out your points. In addition, your clear time is stored on the hi score screen.
Posted Image Posted Image
This post has been edited by RyogaMasaki: 06 December 2018 - 12:59 AM

#269 User is offline Modern 

Posted 05 December 2018 - 11:55 PM

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Uploaded some sprite rips of the game to the SFGHQ discord, Neo suggested I share there here as well.

Spoiler


I will try to do more as I go along. If anyone has any specific sprite requests you are more than free to ask.

#270 User is offline Thunder Bro 

Posted 05 December 2018 - 11:57 PM

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I've gotta wonder why the sprites don't have noses. It seems like such an odd omission to me.

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