Final Fantasy III: Save Point Switch

The Phoenix Cave and Kefka's Tower are two dungeons with a unique feature: you have to split into multiple parties when you enter them. These dungeons also have Save Points within them; when a party steps onto a Save Point, you can Save your game. However, try switching to another party and you'll notice you still have the ability to Save, regardless of whether or not that party is on a Save Point. Not only that, but they can also use Tents and Sleeping Bags. This patch adds a Save Point check to the party switching function.

Final Fantasy 3 (US/SNES), Final Fantasy 6 (JP/SFC)
Save Point Switch Glitch Fix patch

CONTENTS:
FF3-SavePoint-H.ips: The fix patch for a headered ROM file. Apply to fix the Save Point Switch Glitch.
FF3-SavePoint-HR.ips: The reverse patch for a headered ROM file. Apply to revert all changes made by the previous patch.
FF3-SavePoint-N.ips: The fix patch for a non-headered ROM file. Apply to fix the Save Point Switch Glitch.
FF3-SavePoint-NR.ips: The reverse patch for a non-headered ROM file. Apply to revert all changes made by the previous patch.
readme.txt: This file.
Save Point Switch.asm: An assembly format index of code changes.
Save Point Switch.rtf: A text format index of code changes.

ALL PATCHES WORK ON VERSION 1.0 OR 1.1.

URGENCY:
Medium to medium high. Even though there are only a handful of places where it applies, it's still rather unfair.

PURPOSE:
The Phoenix Cave and Kefka's Tower are two dungeons in the game with the unique feature of requiring multiple parties. When inside either of these dungeons, the player can press the Y button to switch between parties. However, these dungeons also include Save Points, which opens the door for an interesting glitch. If the player switches from a party on a Save Point (thus with the ability to Save) to a party not on a Save Point, the new party retains the old party's ability to Save or, by extension, use Tents and Sleeping Bags, despite the lack of a Save Point.

It may seem harmless to be able to Save using a different party as opposed to switching to the party on the Save Point just to do so, the ability to heal using Tents and Sleeping Bags doesn't make sense. I have seen discussion online about whether this is actually a glitch or an intended feature, since it has remained unchanged for any version, but to me it seems like more of an oversight. It's especially strange considering that the party reasonably loses the ability to Save as soon as they move.

The included patch alters the party switching function to reevaluate the information in memory that determines whether the party should be allowed to Save.

VERSION HISTORY:
v1.1 (October 13, 2016): Shrunk the patches slightly.

v1.0 (May 6, 2015): Initial release.

Final Fantasy III (USA)
CRC32: E969BD77
MD5: A684517EBD29308C2E3B55D371E15245
SHA-1: 23422176191B371F01AE3A7CFE7455A2022F8EE8
SHA-256: 6F6911ED4A0E9844770035A3C39157F8C3929C321D5AFACBAFDA39C835B44374
Includes patches for headered and non-headered ROMs
Includes patches for SNES and SFC ROMs