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## Arbitrary Code Execution Discussion

### New method of Arbitrary Code Execution? - Page 1

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#### New method of Arbitrary Code Execution?

Posted by: joshuarpl
Date: 2018-12-30 12:20:51
I think I might've just discovered a new method of Arbitrary Code Execution!
What I did is I got a B1F, and I edited the memory of $A7D0, so I think it is not really a method of Arbitrary Code Execution, but it still executes code, so it kind-of is!

#### Re: New method of Arbitrary Code Execution?

Posted by: ISSOtm
Date: 2018-12-30 15:34:36
B1F ACE is already known and has been explored by TheZZAZZGlitch.
If you don't explain what memory editing you did, then it's not a new ACE method, just a (not so) new ACE item.

#### Re: New method of Arbitrary Code Execution?

Posted by: joshuarpl
Date: 2019-01-01 16:06:28
…
OK, but I use the BGB Debugger for changing and messing with the memory, as well as setting up 8F setups, because I don't wanna waste time getting the items and duplicating then with the MISSINGNO. glitch!

#### Re: New method of Arbitrary Code Execution?

Posted by: Krys3000
Date: 2019-01-01 16:43:05
Hello!
Thanks for your interest and research in the ACE field! As ISSO says, this one is known already and there are countless ACE items in the game - it can even possibly be different between localizations.
I believe we already have a lot of knowledge regarding english games in the individual item pages of the ItemDex, so you can click items and learn what is known about them. What actually could be a good research project is to create setups for some of these items which are not oftenly used because the ACE starts at some undescribed/difficult-to-use point. Don't hesitate to go that way :)
To give you an idea, I have been spending a few days working on glitch items in French Games and detected 18 ACE items in R/B and 8 in Yellow. Possibly more could trigger ACE under certain conditions. Given some time, I will edit the itemdex to add french glitch items categorized into the 8 types of effects I am aware of (Rival's Effect, Unterminated Name, Tile Writer, Partial Escape, Screen Data Saver, ACE, Screen Refresher and Battle Starter)

#### Re: New method of Arbitrary Code Execution?

Posted by: joshuarpl
Date: 2019-01-02 14:53:06
Hm, I now know that its already a method of ACE, thanks for telling me that!
Also, Arbitrary Code Execution is my favorite glitch! You can do a-lot with it, Heck! What can't you do with it?

#### Re: New method of Arbitrary Code Execution?

Posted by: ISSOtm
Date: 2019-01-03 19:30:10
You can't modify ROM, so you can't alter the game's programming. Best you can do is either run a copy of the game loop in RAM (but then you're limited by space), or alter memory in ways that alter its behavior. Both have limits.
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