What kind of patch was it? An IPS patch can be pretty tricky to undo. But xkas patches are relatively easy.

Xkas-based patches come in two forms: those that only modify the SMW source code/data, and those that modify the source/data as well as adding more information. If an xkas patch requires that you provide some free space, then you're talking about the latter kind.

It's easy to remove the effects of either kind. Simply change the bytes back into what it used to be. All.log is a great resource to find out what exactly was overwritten, as well as what it used to be.

Somewhere in the .asm file will be at least one line of the form:

org [ some number ]:

The "some number" is the byte address into the ROM of where the following source code should go. So load up the ROM in a hex editor, find that memory address, and insert the original values. Again, use all.log to find out what used to go there.

Things get more complicated when you're dealing with xkas patches that take freespace. Even with these, there will be at least one line like the above, where it directly changes a section of the SMW code. If you revert that part back to what it used to be, then it doesn't matter what was written elsewhere; that code will never be called.

Unfortunately, if they used the "RATS" tag in their code, as they should, then that chunk of memory will never be used. However, since you have the memory address of where you put it, since you had to write that address in to properly patch your ROM, you can easily enough simply write zeros into that space.

Try this.

i don't know how to hex edit or do ASM...

So load up the ROM in a hex editor

OH CRAP!!!! It was an IPS file...Help? is there a way to un do the ips patch?

There is a very simple way to do this: Revert to a backup made before patching. Really, you should always make one before applying any patch to your ROM.

If you haven't, well... let's just say I think this page might interest you.

Don't you already have them all in the ExGraphics folder?