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11-02-05 12:59 PM
1 user currently in Rom Hacking: hukka | 2 guests
Acmlm's Board - I2 Archive - Rom Hacking - Secret of Mana map compression stuff | |
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Alchemic

Level: 3

Posts: 3/3
EXP: 59
For next: 69

Since: 06-24-05

Since last post: 24 days
Last activity: 9 hours
Posted on 10-09-05 06:24 AM Link | Quote
Somehow I thought I posted this already... apparently not. I worked out part of the Secret of Mana map compression scheme, and documented it here:
http://starmen.net/pkhack/som/sommapcomp.txt
Also, some uncompiled decompressor source (written in Java, created mostly for theory-testing purposes):
http://starmen.net/pkhack/som/ManaMapDecomp.java

Thanks go out to Chickenlump for providing the data that got me started, in this thread:
http://board.acmlm.org/thread.php?id=15049

Knowledge of the compression scheme is not complete; I still don't know how door destinations or event-based map changes (such as the Mantis Ant lair hole in Potos) are done, or how the set of graphical tiles to use is selected.
DukeNukem007

Shyguy
Level: 13

Posts: 90/90
EXP: 9247
For next: 1020

Since: 07-08-05
From: Quahog, RI

Since last post: 18 days
Last activity: 12 hours
Posted on 10-14-05 09:56 PM Link | Quote
Not bad work.

Do you know if this map scheme also carries over to other Square games--FF5, FF6, or Seiken Densetsu 3 seem likely? I don't think anyone has cracked those...
Geiger

Buster Beetle
Level: 34

Posts: 449/460
EXP: 241080
For next: 12571

Since: 03-15-04
From: Indianapolis, IN, USA

Since last post: 6 hours
Last activity: 6 hours
Posted on 10-15-05 11:48 PM Link | Quote
I "cracked" FFVI awhile back.

http://acmlm.overclocked.org/board/thread.php?id=32454 (None of the image links will work now)

Never really finished it off because I began work on Temporal Flux shortly after that. Course, if I had had GSD to work with back then, it probably would have went a lot quicker.

---T.Geiger
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