Press Start Button

That object has a weird effect when placed in game, it teleports him away for a second, then he appears back.

 

Well, that could make sense, seeing as the text flashes.... then again, I don't entirely understand this, but whatever.

 

Perhaps it's something that's been partly overwritten by something else...or...something...

 

In title screen code, there's an opcode that loads some object over the Press Title Screen object, forgot where it is now, I'll search later.

 

If the "Press Start Button" is enabled by defualt, is it possible that it was also originally used when the game would show the usual demos after the Title Screen. Basically you would have the demo showing as usual and the "Press Start Button" would show on the demo screen.

If not, perhaps the "Press Start Button" object is just like any other object that's not suppose to be in that particular zone and just shows up all messed up. You know how you would for example, you go to some Zone like LZ and you would place an object like "Ballhog" or any other object that doesn't fit with the tiles that belong to that Zone and so it appears as nothing but garbage but still is doing its function. Basically the "Press Start Button" is an object that belongs in the Title Screen but not in any of the levels.

Then again, it wouldn't make sense (from what I explained in the 2nd paragraph) considering some of the tiles for the "Press Start Button" can still be found at LZ and most likely in the other Zones (I've only manage to see it in that zone so far when I was hacking it) and those tiles are even shown correctly on the "Press Start Button" object if placed and shown in LZ mind you unless the reason those tiles are there is becuase the Zone doing the same thing how Hidden Palace Zone did in Sonic 2 (final) where the Zone was using tiles from another Zone like Oil Ocean since the orginal tiles for it were gone and so you get garbage in that Zone, Only LZ is using some tiles from the Title Screen to fill in whatever was in those tiles in the first place (doubt it).

 

Yeah, Hivebrain is right. Btw. the other way to enable PSB object is to nop 6 bytes at 0x2fd0 (US version)

 

I'm guessing that's just a leftover from getting in Labyrinth through the title Screen/Stage select menu. The level might just not load anything into that VRAM adress, so if you get in there through normal play you'll probably find Marble graphics in its place, since the game just doesn't clean the graphics it's not gonna use.

I doubt the PRESS START BUTTON words were ever supposed to appear anywhere else than the Title Screen.

 

PSB also shows up when you've done the Japanese credits code, given the proper region setting and use of the proper code. I've never got it to appear on hardware, half due to my PAR having a dodgy connection, and half due to me tending to forget to disable checksums half the time.

If this is triggered by a RAM address, does anyone know it? It'd be much handier to just patch that single word of RAM, especially if it's paired with another byte of interest.

 

The code is FFFFE3:0001. By the way, number of C pressed in level select code divided by 2 + FFFFE0 gives you the ram address (I know that's tricky =P)

 

Hm, I never knew that...so, basically, every time you press C twice, you're incrementing a counter that the game uses as an offset to choose the correct cheat to enable? Quite ingenious. Also oughta make it fairly simple if one wanted to add additional cheats, just shuffle some RAM around if you need to.

So it's FFE3...that's cool to know.