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Author Topic: Camera Lock Codes and Weird OOB  (Read 1247 times)
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« on: July 07, 2017, 10:51:12 PM »

This is probably nothing, but it's worth pointing out in case there is some crazy thing that's useful resulting from this. Video: https://www.twitch.tv/videos/157318168?t=23m40s

I have the following codes active:
02030E3C:00000000
02030E40:00000000
02030E44:7FFFFFFF
02030E48:7FFFFFFF

I know this causes weirdness on the world map, but I've never seen it cause huge weirdness like this before.

Basically, accessing certain doors OOB will black out the screen and the game will start writing values to the games memory. It basically filled up a lot of the 02000000-02000300 section as well as writing a ton of sprite data (tracked by the nonzero tile thing in my script, lower the number = more sprite data). Eventually the game will load the room I was supposed to end up in.

The values of memory written change depending on the coordinates of the door I access (not the destination of the door) and solves the puzzles in the game as you would expect with values written to those addresses.

I'm wondering why this bizarre behavior is having, and whether there's any idea as to how this may be replicated without the camera lock codes.
« Last Edit: July 07, 2017, 11:28:15 PM by Plexa » Logged
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« Reply #1 on: July 07, 2017, 11:03:04 PM »

@Link: 
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Sorry. Unless you’ve got a time machine, that content is unavailable.
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« Reply #2 on: July 07, 2017, 11:28:30 PM »

Whoops, fixed!
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« Reply #3 on: July 08, 2017, 07:04:29 AM »

Umm.. that is interesting.

Current discoveries:
-The Code must be enabled. (A manual hex edit is not enough.) Or well, maybe you could get perfect timing, but I'm talking about what's practical for quick testing.
-You do not have to go Out-of-Bounds / no Retreat Glitch needed.... simply going through a door is enough. (Like the one at 260:1)

Going to guess that there's nothing abusable here, and the same memory area gets used for something else during room transition. (Although, not really sure what exactly is here, so just a hunch given the way these sections work... That being available memory to use for anything you might want since there's a pointer list at 0x03000000... (e.g. 02030000-0203FFFF, as well as a section in IRAM) ... But most other data end up always being what they are. Especially if you don't count the individual tables/stuff in map code.)
« Last Edit: July 08, 2017, 07:43:26 AM by Fox » Logged

Golden Sun Docs: Broken Seal - The Lost Age - Dark Dawn | Mario Sports Docs: Mario Golf & Mario Tennis | Misc. Docs
Refer to Yoshi's Lighthouse for any M&L hacking needs...

Remember kids! Before you go on that interview, remember to wash your hands in teawater! *Coughs on hand* (Excuse me, I just coughed up a little teawater, so they're still clean!) You wouldn't want that hiring manager to be unimpressed.

May the force be with you!
Shoo! Why does it smell in here?
Maybe that's the wrong kind of force. *smirk*
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« Reply #4 on: July 08, 2017, 07:07:12 PM »

Could it be related to the split map table for jupiter lighthouse?
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« Reply #5 on: July 08, 2017, 11:00:21 PM »

Okay... Progress Update - It is something with the screen min/max numbers....

* Today, I decide to do research using VBA-SDL-H.
* Puts a breakpoint write on 02030E44 for 8 bytes so I can keep changing them back to 0x7FFFFFFF manually. (Don't worry, it's simple if you use the Up arrow (keyboard button) in the Console window.)
*Puts a breakpoint write on 02000090 ... so I can research what's going on.

Breakpoint found. (Usually in the set flag function, so I exit that function to see what called it.)
02009422 ...coming straight from map code! Yay!

...
Hmm... 0200A78C = Literally look at that section grow! (I know that some of that data includes flag indexes as well.)

Haven't looked, but I'm thinking it's possible that the entries listed here may be based on whether they are in the map region you're in. (Well, based on the min/max screen set.)
I think the entries are about the cracks in the floor. (Flags are set for those... probably to determine if it should crack itself or make you fall through. ... and likely may also help determine the graphics used or something?)


Thing is... unless you can load a room with an improper screen size, I can't figure out how this would be abuseable.
« Last Edit: July 08, 2017, 11:15:16 PM by Fox » Logged

Golden Sun Docs: Broken Seal - The Lost Age - Dark Dawn | Mario Sports Docs: Mario Golf & Mario Tennis | Misc. Docs
Refer to Yoshi's Lighthouse for any M&L hacking needs...

Remember kids! Before you go on that interview, remember to wash your hands in teawater! *Coughs on hand* (Excuse me, I just coughed up a little teawater, so they're still clean!) You wouldn't want that hiring manager to be unimpressed.

May the force be with you!
Shoo! Why does it smell in here?
Maybe that's the wrong kind of force. *smirk*
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April 18, 2019, 01:18:08 AM
Fox: Thinking.... meme topics.....    Isaac: Stop calling me a sack! Also, don't call me sick either!
April 03, 2019, 08:24:45 PM
Fox: Really don't see the point in the Crystal or even the crown conversation, but whatever... (I mean, if you want to do it, then just do it. - Doesn't need to be at GSHC, because there are no longer clan leaders at GSHC.)
April 03, 2019, 03:59:33 AM
squizzy44: We all need to band together to take down Crystal.
April 02, 2019, 12:00:09 AM
Fox: Your clan?  You can't edit it manually, so you have to tell an admin so they can do it. There's actually a topic for when you pick a clan... but uhh... I've no idea if an admin will see it via that, though. (Kain will certainly see id you ping him on GSHC Discord.)
April 01, 2019, 05:28:42 PM
squizzy44: How do I change my position on my profile? I haven't used the site in nearly 10 years...
March 31, 2019, 10:10:15 PM
Fox: I still wonder if a Tret glitch for speedrunning exists... I don't think I looked into if the PC was on one of the other layers. (Which basically the second layer edits @-0x200 instead of @-0x100... in the event you are going up (y-axis) out of bounds.) Hm.
March 31, 2019, 06:18:43 PM
Fox: Not me.
March 31, 2019, 02:59:38 PM
Salanewt: I don't know of any, although if there were then we'd have to send it as a patch file. I think someone is working on it at least!
March 29, 2019, 07:51:48 PM
MaxiPower: no such thing exists
March 26, 2019, 03:38:42 AM
reeZ931: I would really appreciate it 
March 26, 2019, 02:39:38 AM
reeZ931: Anyone have a golden sun rom where you can play as saturos and menardi properly? 
March 25, 2019, 09:31:15 PM
Fox: It would explain why everyone leaves so quickly after taking our bananas.
March 24, 2019, 10:36:10 PM
Fox: Wouldn't bananas increase agility the more you have? Like... Diddy Kong Racing reference.
March 22, 2019, 11:19:11 PM
Average Wind Seer: Banana: Restores 50PP to user. Restores 40PP to Isaac if Jenna uses this item.
March 22, 2019, 09:57:53 PM
Salanewt: Lol. I mean, I am thinking of adding a banana item to GS so...
March 22, 2019, 09:48:42 PM
Fox: Ooh! Sala's back!  I think he wants a banana.  All this banana talk must have attracted him.
March 22, 2019, 08:56:52 PM
Fox: :O I just notice I have no Coins to buy bananas with! (You know, the coins feature this forum has.)
March 04, 2019, 08:45:44 PM
Fox: Aw.  I kind of want to suggest dressing up in a banana costume.  No wait, that's a bad idea.
March 04, 2019, 04:24:10 AM
Average Wind Seer: *angry gorilla noises that roughly translates to "Stay the [redacted] off my island and don't touch my [redacted] bananas"*
March 04, 2019, 03:06:07 AM
Fox: Gosh. This is like playing whack-a-mole! What's taking you so long with the bananas?! :D

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