Weird, for me, Dillon's Dead-Heat Breakers had the 3D Depth value in 0828577C, I'm using the USA version of the game.
Also, I was looking into the 3D Pop out address and found that this is also achieved by modifying two values together, you can bundle this code alongside the following 3D depth code to get a nicer looking 3D effect (The game now looks as a 3D game lol):
3D FOV AND POP OUT:
00125DA4 3F800000 -> 3DD00000
00125DA8 40000000 -> 41100000
00125DB0 BF800000 -> BF000000
Then, modify the 3D Depth code even further, like this:
0828577C -> 43A00000
I also made this as AR cheat codes:
[3D Pop Out Default]
D3000000 00000000
00125DA4 3F800000
00125DA8 40000000
00125DB0 BF800000
D3000000 08000000
0028577C 41200000
D2000000 00000000
[3D Pop Out+]
D3000000 00000000
00125DA4 3DD00000
00125DA8 41100000
00125DB0 BF000000
D3000000 08000000
0028577C 43500000
D2000000 00000000
[3D Pop Out++]
D3000000 00000000
00125DA4 3DD00000
00125DA8 41100000
00125DB0 BF000000
D3000000 08000000
0028577C 43A00000
D2000000 00000000
This! -> [3D Depth ++ (Deeper 3D)]
We need to finad out by searching into possible values that could have been left as SDK symbols, like empty memory values that are surrounded by -1 and +1 float values. I haven't had too much luck yet though, the only game I got to have a seemingly 3D effect working was Kirby Epic Yarn, but everything looks horrible lol, I need to search for the HUD coordinate values and fix them first.
Mmmm... this is something that needs more RE, as 800px mode wasn't included in Nintendo's SDK (AFAIK). Please correct me if I'm wrong, and if this mode was ever included in Nintendo's SDK, then there's a possibility that somewhere in memory there are symbols or value leftovers that can enable that in., otherwise, we would need to disassembly each game, which is a hard and time consuming task.
I will add the newly found codes tomorrow once I have free time, as I still need to copy many codes left from the old thread, and I will post more codes that I have been searching.