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Author Topic: Jupiter Lighthouse Stuff  (Read 1170 times)
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« on: February 08, 2017, 12:11:32 PM »

Hey everyone. Jupiter lighthouse is known as the most unbroken dungeon in TLA. Everything we've thought of has failed. I took another run at the Lighthouse today and made a curious observation concerning the retreat glitch.

Normally the retreat glitch works like this. After retreat has failed the game thinks you are in the room that you would have been sent to if retreat was successful (the 'retreat room'). Example - entering Airs rock through the second entrance makes the retreat point Area 55 Door 10, if you enter another Area of the dungeon (say Area 58) and use the retreat glitch then the Area is reset to 55, while you're still physically in Area 58. In this glitched state walking through doors loads the corresponding door in the retreat room. So if you're in Area 58 and walk through Door 3, instead of being sent where this door sends you instead you will be sent to where Area 55 Door 3 will send you.

Hopefully that's not too confusing.

In Jupiter Lighthouse this doesn't appear to happen. Regardless of which door you access, you always get sent back to Area 251 Door 0. This is the same location you'd be if you'd entered the dungeon from the overworld. I'm not sure if it is Door 0, but it certainly seems like it is.

I'm just wondering if there's anything special code wise surrounding this lighthouse that might explain this. I know that encountering Alex resets the last visited Sanctum to Contigo, but beyond that I don't know of anything. 
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« Reply #1 on: February 08, 2017, 02:24:34 PM »

It is most likely because the Retreat room uses a different map code file than the rest of the Lighthouse, so the map number doesn't get found.... and if none are found, it doesn't know what to change the map/door number to, so it leaves it as is?

http://forum.goldensunhacking.net/index.php?topic=1014.0 = This topic describes how Exit data is formatted, to point out that a map number is looked up. (Compared with what is stored at the value that gets changed when Retreat fails.) .... However, when I say "different map code files" then that means this gets changed as well... (02008000-0200FFFF = Map code file section.) (When Retreat fails, it doesn't revert back to the Retreat Map's Map Code, which would have been cool, but oh well. And even if it did in this case, then there wouldn't be much abuse you could do, could you? With only two doors that's nearly 10 seconds apart....)
« Last Edit: February 08, 2017, 03:08:41 PM by Fox » Logged

Golden Sun Docs: Broken Seal - The Lost Age - Dark Dawn | Mario Sports Docs: Mario Golf & Mario Tennis | Misc. Docs
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*Cross my fingers and hope we have Big Brother All-Stars next year... with Paulie & Cody Califorie(sp?)... and Vanessa & Tiffany Rousso.... Would be fun? :P Especially if one of the boys got evicted early since there's usually some all-guy alliance in there, right?
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« Reply #2 on: February 09, 2017, 11:42:34 AM »

The retreat glitch still works, just the every door sends you to the entrance of the dungeon (where you would have been sent if retreat was successful).

If I'm reading the editor correctly, I see the following exits; door 1 -> world map, door 2-> door 2 of 0xFE, door 3->door 3 of 0xFE, door 4 -> door 4 of 0xFC

This doesn't indicate that there's anything funny going on. Although I'm comparing it to another room which has a "madra warp" (felix gets sent to a default position on the world map) to see what is different. Along these lines, it's probably worth clarify exactly what is going when these madra warps happen.

One example is the 0xB door in room 0xCF (Tundaria Tower Interior). Door 0xB in map 0xCF gets sent to door 2 room 0xCF. If you retreat warp through the door you get sent to madra. Looking up Room 0xB relative to map 0xCE (which is where retreat would send you) would make the game read the blank code 0xFFFFFFFF

http://imgur.com/YNQW8RG

Does this mean that the game trying to send you to door 0xFF in area 0xFFF and this sends Felix to the default position on the world map? Or does the game try to look up Door 0xB in Map 0xCE, find nothing, then default you to the default position?

I noticed that the Jupiter Lighthouse stuff is missing any of the 0xFFFFFFFF separators, hence these questions.

EDIT: the first room of Jupiter lighthouse for convenience https://gyazo.com/bc4cb999812c43654b92e1cd6273409f

« Last Edit: February 09, 2017, 12:32:02 PM by Plexa » Logged
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« Reply #3 on: February 09, 2017, 06:26:25 PM »

While I believe Jupiter is b/c of separate map code files... / Map's exit list not found ....
Tundaria is a different case... (It is the same file in both places)... In that case, map's exit list is found.... however, the exit is not (Exit 0xB is higher than how many the retreat room had...) So that one choose the map of the first entry. (Interesting/ assuming I read things right... was rather quick...) (Seems like the list detects entrance 0 as the end of a list of map exits.)

Exit data stops at 0x000001FF. (If you seen Atrius's topic, you'd know you can have multiple tables of these ending in that, but also multiple exit lists in one... erm... heheh.... )

080C9694 = Relevant function that scans the exit data... I probably should write up some psuedo-code, huh....?
« Last Edit: February 09, 2017, 06:52:53 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...
*Cross my fingers and hope we have Big Brother All-Stars next year... with Paulie & Cody Califorie(sp?)... and Vanessa & Tiffany Rousso.... Would be fun? :P Especially if one of the boys got evicted early since there's usually some all-guy alliance in there, right?
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« Reply #4 on: February 09, 2017, 06:51:53 PM »

Ah yup I get it now. Curious that some dungeons have map code files split and others not.
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« Reply #5 on: February 09, 2017, 07:20:29 PM »

My guess is that its probably for compression/spacing. Not 100% sure...

If you have all map's map code files separated.... it might be too bulky in the ROM.
If you hae all maps using the same map code file.. well, we're limited to only 0x8000 bytes in RAM for it, so then it wouldn't fit.
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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...
*Cross my fingers and hope we have Big Brother All-Stars next year... with Paulie & Cody Califorie(sp?)... and Vanessa & Tiffany Rousso.... Would be fun? :P Especially if one of the boys got evicted early since there's usually some all-guy alliance in there, right?
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Cbox
August 20, 2017, 08:59:37 PM
Fox: Same... depending on whether they've used tricks instead or not.
August 20, 2017, 08:02:49 PM
Salanewt: I could see it counting.
August 20, 2017, 11:24:44 AM
Fox: Not sure if Zelda (LttP/Minish Cap) count or not...
August 20, 2017, 11:23:00 AM
Fox: Appararently, I can't think of many GBA games that do the psuedo-3D thing. (That being 2D maps with 3D-like collision...) Golden Sun and Superstar Saga come to mind, though... but I'll need to think about others, since it is quite possible i've simply forgotten....
August 19, 2017, 03:45:19 PM
Fox: Hmm... Thought: What if Isaac and co. weren't on Jupiter Lighthouse when Felix and co. were... I wonder if the story could have had a huge expansion, in this case.
August 18, 2017, 12:18:56 PM
Fox: Welcome back!
August 18, 2017, 09:12:43 AM
Luna_blade: back from vacation
August 17, 2017, 02:29:26 AM
Fox: That moment when you realize that there is a lot of chatting going on on Discord, that there is no point in trying to keep up. :P  Hm....
August 16, 2017, 04:50:22 AM
Fox: (Then again, just because posting is disabled, doesn't necessarily mean the buttons would be removed as well.)
August 16, 2017, 04:48:55 AM
Fox: (I mean, buttons I would expect to be similar to that.... rather than those specifically since I recall posting there to be disabled.)
August 16, 2017, 04:33:02 AM
Fox: Yeah... I like to think of it as a page loaded with ads. And it's not just the forum home page either... check the sub-forums/topics themselves. == New Topic/Reply/etc. buttons were affected.
August 15, 2017, 07:04:30 PM
Salanewt: Lol, nice. :P
August 15, 2017, 06:33:02 PM
Foxhttp://z9.invisionfree.com/Golden_Sun_Hacking/index.php? == Hahaha! GSHC Classic looks funny now that Photobucket killed the images. :P Anyway, how is everyone doing today?
August 14, 2017, 07:12:02 PM
Salanewt: So yeah, I'm typing up a non-academic essay on why GS2 was rushed; expect that sometime soon!
August 07, 2017, 05:53:11 AM
Fox: But anyway, such a hack mod is simply an idea, and I do not have any current plans to work on it at this time, so.....
August 07, 2017, 05:51:46 AM
Fox: Okay, cool. I think my idea works best without an ability to swap PCs (OR to just simply make that use it the PC's turn.) Hmmm... And with that, I question if a turn list is even needed with my approach. (Outside of maybe 1 entry, if that shortens the modifications.)
August 07, 2017, 05:13:26 AM
Salanewt: To be honest I've been thinking of expanding the battle turn section and also adding code for PCs to have more than two turns in the AI overhaul, but I probably won't allow anyone to have more than four.
August 06, 2017, 12:22:17 AM
Fox: Oh, and if that approach was taken = Would like to also have it so you select the spell to use when it is actually your turn rather than at round start.
August 06, 2017, 12:12:37 AM
Fox: Would take a lot of balancing, but I can see an adept being very slow, and yet very powerful.
August 06, 2017, 12:06:11 AM
Fox: And bosses can have an Agility that is above half of the maximum possible Agility. Mwahaha.

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