Final Fantasy III: Mini-Maps Upgrade

This modification showing mountain ranges on both mini-maps was originally applied in the now obsolete FF3Edit editor when you save the ROM. Since those new mini-maps take more space, WOR mini-map was stored at F0/0000 when saving. With the patch, all subsequent compressed graphics after WOB mini-map are shifted and some of the EF/FBC8 free space is used instead.

This patch is a good way to have this FF3Edit feature without taking the chance of corrupting your ROM. The changes are done in a more logical way, freeing the beginning of the $F0 bank.

Since the original FF3Edit code did not take into account the Sealed Gate Continent rising, an app has been coded to fix the bug and work with custom maps.

Mini-Maps Upgrade 1.2
---------------------

This patch modify the mini-maps like FF3Edit does.

However, FF3EDit does not take into account a color switch for the Sealed Gate that has
different colors in order to mask it with the water color after the continent lifted up.

It also does not take into account location masking for the Sealed Gate entrance, resulting
in a white dot in the water. I altered slightly the palette.

I had to sacrifice a color for the Sealed Gate continent, so 2 color are reassignated to color 8.
This does not make a significant difference. I had to do this to have a matching location color
I would mask, it was a tough choice between the two but figured on a custom map the choice I've
made could have been the obvious one to do.

An app doing the same job as the patch is available for custom maps:
https://github.com/madsiur/FF6MMGEN


ROM Area affected
-----------------
$EFE49B-$EFE8B2 World of Balance Minimap Graphics
$EFE8B3-$EFED25 World of Ruin Minimap Graphics
$EFED26-$EFFAC7 Daryl's Airship Graphics (relocated right after WOR mini-map)
$EFFAC8-$EFFBC7 Palettes for Ending Airship Scene (relocated right after Airship GFX)
$EFFBC8-$EFFEEF Unused Space (beginning could be used due to data shifting)


Code changes
------------
$EE9B0E: NOP
$EE9B0F: JSR $B1F7
$EE9B12: PLP
$EE9B13: RTS

$EEB1F7: STA $7EE1B0
$EEB1FB: STA $7EE1B2
$EEB1FF: RTS


Palette changes
---------------
M = used on modified mini-maps
S = used for Sealed Gate contient

ID Offset Description Hex value RGB value
---------------------------------------------------------
1- $D2EEA2: sea (M) $1084 (4,4,4)
2- $D2EEA4: land, dark (M) $294A (10,10,10)
3- $D2EEA6: land, medium (M) $35AD (13,13,13)
4- $D2EEA8: mountain edge (M) $4E73 (19,19,19)
5- $D2EEAA: location (M) $7FFF (31,31,31)
6- $D2EEAC: land, dark (S) $294A (10,10,10)
7- $D2EEAE: land, medium (S) $35AD (13,13,13)
8- $D2EEB0: mountain edge (S) $4E73 (19,19,19)
9- $D2EEB0: location (S) $7FFF (31,31,31)
10- $D2EEB4: mountain edge, light (M) $5AD6 (22,22,22)


Sealed Gate color switch
------------------------
color 2 -> color 6
color 3 -> color 7
color 4 -> color 8
color 5 -> color 9
color 10 -> color 8


RAM color switch
----------------
color 1 -> color 6
color 1 -> color 7
color 1 -> color 8
color 1 -> color 9


Credits
-------
- LeetSketcher for Mini-Map palette findings
- Yousei for FF3Edit source code (compression and minimap generation)


Links
-----

FF6MMGEN, FF3Edit and Zone Doctor source:
http://www.ff6hacking.com/wiki/doku.php?id=ff3:ff3us:util:start#source_code

Github:
https://github.com/madsiur/FF6MMGEN

FF3Edit:
http://www.romhacking.net/utilities/192/

Thread:
http://www.ff6hacking.com/forums/showthread.php?tid=3368


Version History
---------------
1.2 - 03/10/2017 - Palette tweak
1.1 - 02/28/2017 - FF3Edit bug correction
1.0 - 12/31/2016 - Initial Release


Infos
-----
contact: themadsiur@gmail.com
website: http://madsiur.net

File: Final Fantasy III (U) (V1.0) [!].smc
CRC32: D184D919
MD5: 4CDFC79B44CD6D532DC6631A5C762094
SHA1: 258BCBC5B7BCC25098BF598C4FF2AA6AC00FDE16
File: Final Fantasy III (U) (V1.1) [!].smc
CRC32: E71362B7
MD5: EF1DE04CA2F61E88B77FA0F101C914DA
SHA1: 8B114342C844255C59B4345A30E0A34E784680EA
Headered and unheadered patches included