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7/2/2025, 9:59:22 PM
Interesting Sonic 1 discovery.
https://forums.sonicretro.org/threads/the-supreme-topic-of-other-knowledge.8815/page-540#post-1098538
At offset 0x40C0 in Revision 0 of Sonic 1 (In Revision 1, it'd be offset 0x40C2, and in the prototype we currently have, offset 0x311C), there's a set of demo input data that appears to be unreferenced in the code.
A recording of the demo data from the prototype can be seen here:
https://youtu.be/S8_IAfQbUu0
The poster also uploaded a recording:
https://youtu.be/J2M04N15JZc
The demo inputs seem to consist of a series of walking to the right and stopping periodically, with a single jump partway through, and then it ends with Sonic running at full speed to the right.
If this data is unused, what's interesting about this is that it seems to line up with what is known about the Tokyo Toy Show demo.
Most of the screenshots of the demo feature Sonic walking (moving at a slower speed than would trigger the running animation), with Sonic only seen running in the screenshots near the presumed end of the demo.
>We know that Sonic stopped before an airborne/mid-jump enemy, and then ran underneath it.
>We also know that Sonic jumped, dodging another enemy that was on the ground.
This data also made its way into Sonic 2 and the 1103 prototype of Sonic 3.
We do know of at least a few other early development leftovers, like object ID 02 & 03 in the proto, which are leftovers from prior to TTS:
https://files.catbox.moe/ux3k44.gif
https://youtu.be/CRphv7x97uw
Tokyo Toy Show demo's parallax scrolling data is leftover in the final, and one of Sonic's unused victory jump animations remains all the way to Sonic & Knuckles. So, there's a precedent for early Sonic 1 development data being left in the code. Sonic Retro has come to an agreement that this demo input data is highly likely a TTS leftover.
https://forums.sonicretro.org/threads/the-supreme-topic-of-other-knowledge.8815/page-540#post-1098538
At offset 0x40C0 in Revision 0 of Sonic 1 (In Revision 1, it'd be offset 0x40C2, and in the prototype we currently have, offset 0x311C), there's a set of demo input data that appears to be unreferenced in the code.
A recording of the demo data from the prototype can be seen here:
https://youtu.be/S8_IAfQbUu0
The poster also uploaded a recording:
https://youtu.be/J2M04N15JZc
The demo inputs seem to consist of a series of walking to the right and stopping periodically, with a single jump partway through, and then it ends with Sonic running at full speed to the right.
If this data is unused, what's interesting about this is that it seems to line up with what is known about the Tokyo Toy Show demo.
Most of the screenshots of the demo feature Sonic walking (moving at a slower speed than would trigger the running animation), with Sonic only seen running in the screenshots near the presumed end of the demo.
>We know that Sonic stopped before an airborne/mid-jump enemy, and then ran underneath it.
>We also know that Sonic jumped, dodging another enemy that was on the ground.
This data also made its way into Sonic 2 and the 1103 prototype of Sonic 3.
We do know of at least a few other early development leftovers, like object ID 02 & 03 in the proto, which are leftovers from prior to TTS:
https://files.catbox.moe/ux3k44.gif
https://youtu.be/CRphv7x97uw
Tokyo Toy Show demo's parallax scrolling data is leftover in the final, and one of Sonic's unused victory jump animations remains all the way to Sonic & Knuckles. So, there's a precedent for early Sonic 1 development data being left in the code. Sonic Retro has come to an agreement that this demo input data is highly likely a TTS leftover.
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