Can anyone make a step by step for finding the Moon Jump Code For NES Batman?

[xirtamehtsitahw]

The way I find moon jump codes is:

1. initiate unknown value search whilst your character is on the ground.
2. jump, then execute "greater than" search.
3. let them hit the ground again, and perform "less than" search.
4. repeat the above procedure until you home in on the right address.

This can be a bit tedious, but it works.

[jericho]

Find code that reads or writes your "Y" positions and everytime found a code look the disassembler and search what is the address

[Retrocheats]

Got any examples that I can write down for later?

[Cyperium]

I can't say for this specific example, but often when I do moon jump codes I first look for the memory address which handles the y position, then find what memory address that makes it change when I jump (jump velocity), at some point there will be some condition for when the velocity changes (near the end of the jump) and I'll find a code which skips that condition.

Jump velocity is often stored in ROM so if you can find that place in the rom (just look for when jump velocity is set and it should be set according to a value in some lookup table in the rom) then you can simply change that.

[Retrocheats]

But I know Assembly. Not Pro, but understand the basics..
The guide is just explaining branching.. which I kind of understand

[Tony H]

There is a Jump in mid-air guide in the Library section that uses an NES game for an example, but it requires assembly knowledge so probably won't help much.

[Retrocheats]

Curious if sega can be converted to NES.. never used tracing.
Will see what I can do for now

[Tony H]

I wrote a Moon Jump guide for a Sega Genesis game. Might be helpful...

https://codehut.gshi.org/HowToJumpCodes.txt

[Retrocheats]

Batman NES, Moon jump, BY Phil The Hammer = NZUOAUPA

I learned recently how to make some game genie codes, but curious on how this code was found.
Is there anyone willing to post some Ram Results, then how they debugged, what debug info they extracted, and how the final result was "NZUOAUPA"?
With so little guides, and most of them teaching you infinite lives, a real juicy code tutorial would be much more helpful!