Mystical Ninja: Starring Goemon levitation issue

[SinCron]

I'm a fan of the good ole "Press L to levitate" for games that I've beaten but I notice that this cheat wont work after the first giant robot battle (Impact). Has anyone else experienced this and are there any workarounds?

[HugoChileno]

Originally Posted by SinCron

I'm a fan of the good ole "Press L to levitate" for games that I've beaten but I notice that this cheat wont work after the first giant robot battle (Impact). Has anyone else experienced this and are there any workarounds?

I have the same problem

Any idea how to get back to work? "Press L to Levitate"

[HugoChileno]

Someone with the same problem?

[theboy181]

Probably self modifying code. You will need to examine the cheat code and use some ASM hacking to modify the function.

Another thing you could do is look for the memory value after that part of the game to locate the new location in memory.

[HatCat]

I'm impressed by your expectations of these posters. Even I'm not that cruel.

They could just switch the core style to "Interpreter" if the whole cause was protect memory.

[theboy181]

interesting, would that work?

I think that the post might lead them to trying to resolve it, but who knows.

If I had the code and a save I might make a quick attempt at the GS code. ASM is still too time consuming for my current skill set.

[HugoChileno]

Originally Posted by HatCat

If your theory was accurate, then yes, it's guaranteed by definition to work.

That is, if you're correct about self-modifying code being the cause. Self-modifying code invalidates the instruction cache on the x86 server's side when any recompiler is used. An interpreter does not have an x86 server but only the MIPS client and does not have to synchronize anything if code space were overwritten, so the problem of self-modifying code becomes irrelevant which means an interpreter core should invalidate any issues caused by cheat codes being corrupted by self-modifying code.

Originally Posted by theboy181

lets see if the code and save states get posted. I would like to look into it, as its defiantly interesting topic. However, I do jump to "theory crafting" quickly when talking with first time posters..

Hello HatCat and theboy181
Thank you for your help! Here are the save states with the game I have with the cheat of levitation working and the other not working. In the .txt file I described.

[HugoChileno]

[theboy181]

Press L for levitate

D00C7D3B 0020
8116A044 4000
D00C7D3B 0020
8116A134 4000

Let me know if you have other issues, might need a pointer

[theboy181]

Please remove the link you provided, that included the GAMES ROM. This is not tolerated, and can get you banned.