Special Stage Drawing

[MainMemory]

I would like to know what routines are responsible for drawing the Special Stage and how they work. I ask this because in Sonic & Knuckles Collection, there is an extremely noticeable desynchronization between the positions of the sprites and the position of the floor. Knowing how it's supposed to work in the MD version could be very helpful in trying to figure out what's gone wrong in S&KC.

[Dynamotivation]

Hi there.
Have you found a solution for your question yet. I'm trying to figure out how the calculation of the positions worked on the original hardware and I'd be happy if you could help me find the math formula.
Thanks in advance.

[MainMemory]

Well, I understand some of how the Special Stage works now, but I still don't know why the desynchronization happens. I don't know specifically how the positions are calculated though, sorry.

[Clownacy]

Update: the cause of the desyncronisation was found and fixed. I'd ask if this should be closed, but since this is a disassembly project, it is an issue that this isn't documented.

[MainMemory]

Better get @fredbronze in here then.

[liliambean]

I don't understand. Why would we document a bug introduced with the 1997 PC port in the disassembly project of the 1994 MD version?

[MainMemory]

We're not documenting the bug, we're documenting the Special Stage in general.