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Interesting information. Does anyone know what NPCs are in game but aren't used? Specifically I need two in Underground Maps.
Due to certain changes I've been making in my project (tying the Bows and Arrows indexes to 2 now-dummied weapons to allow the rest of the bows/arrows become new weapons), I cannot for the life of me get the Aim command to function properly.correctly. The main reason for this I believe is because Aim was only meant for bow & arrow, or the command checks that a character has some weapon in each hand.
Is there a way to allow it to function with a one-handed weapon? I tried messing with it's ranges in FF4kster, but to no avail. I'm not actually sure of the benefits Aim would have now that I nexed Bows/Arrows (I think all the command does is ensure a hit? I'm not sure what else it normally does)
I'm also wondering if it's feasible to tweak the Regen command to heal MP periodically instead of HP based off the Wisdom or Willpower stat. Seeing as Yang is the recipient of this command, I don't think it would be game-breakingly overpowered if I were to go this route.
In ROM this is located at...
01A48E - C9 05 (Compare with Dark Wave's Command)
01A492 - C9 08 (Compare with Sing's Command)
01A496 - C9 0C (Compare with Aim's Command)
01A49A - C9 10 (Compare with Twin's Command)
01A4F8 - C9 61 (Right Handed - If the Weapon value is this or above this (or 00?) Dark Wave cannot be used)
01A504 - C9 61 (Left Handed - If the Weapon value is this or above this (or 00?) Dark Wave cannot be used (May be Equipped Hand)
01A50E - C9 44 (Right Handed - If the value is this or above this, Sing can be used)
01A512 - C9 4D (Right Handed - If the value is this or above this, Sing cannot be used)
01A51C - C9 44 (Left Handed - If the value is this or above this, Sing can be used)
01A520 - C9 4D (Left Handed - If the value is this or above this Sing cannot be used)
01A52A - C9 54 ( - If the value is this or above this Aim can be used.
01A52E - C9 61 (Right Handed - If the values it this or above this Aim cannot be used (Looking for Bow? This would hint that Aim can be used with two Arrows equipped or two bows... well I'll give it a shot... Yep. Looks like it's right. Aim can be used with Two Bows or Two Arrows. An interesting non-check. Good on the programmers.)
I'm uploading my streamed videos directly to YouTube now, as they retain much better quality than when you archive them from Twitch. I'll start streaming again in a few minutes, while I wait. :)
I just checked the source of my download link. It was jce3000gt.com.I'm intensely curious what's in that chest now, in the unmodified ROM. Going to play for 3 minutes and find out. :)
EDIT: Yup! The RuneAxe was in that chest! Someone's been messing in my ROM.
Ok, I've decided what Edge will give you, but it's a surprise.
I will say though that it is a one-time-use item, not an equipment. That said, it is not a generic item. It is only obtainable by ditching Edge.
Recently I've been hacking the European version of Final Fantasy 4 Advance, and have made notes on its data structures, ASM code and AI scripting as I went along. Since there doesn't seem to be much documentation on this version that I could find, I though I'd share my notes here.
This is a link to my notes, including modules for use with the Nightmare table editing program (not very flexible, but it's dead easy to use). It includes documentation on item,spell and monster data, encounter sets, encounter setting (eg. what music to play, whether some monsters start out hidden), monster AI, chest contents and more; the bulk of my notes are in "ff4a-structs.txt", which was originally based off of notes by PKT Paladin.
I've also written some custom ASM code for a little hack of mine that might be helpful to others.
More variance for encounter RNG
If you've played FF4a before, you probably know how the encounter system is messed up: the same battles tend to occur over and over again, and saving+loading doesn't help. This is mostly due to the fact that the RNG used to determine what you encounter and when is seeded from only one thing: the amount of time you spend on the file loading screen. This tends to produce very similar seeds, leading to the same pattern of encounters recurring.
This code fixes this problem by seeding this RNG with your save file's game clock in addition to the above:
$0827E6: 2188 401A 0F49 6052 3CF0 D3FA 2188 4018
Paste write the above byte sequence to $827E6 in the FF4 Advance (E) ROM.
Allow monsters to use their Magic Defence Multiplier
Normally, a monster's MDef Multiplier in the ROM is never written to their RAM battle data. To undo this, make the following change:
$93082: Write 0000
Note that all monsters have zero Magic Evasion by default, so you'd need to give them values yourself.
Back Row functions almost properly
In the European version, melee weapons have no penalty to Attack or Precision for attacking from the back row, while the actual long-range weapons (Bows, Harps, Boomerangs and Whips) do receive a penalty. To fix:
$8A858: 07D1
$8A868: 00D0
Currently my code fixes this by making your attack Back Row-Ok if you have any long-ranged weapons equipped, which means that Edge with a katana and boomerang can attack at full power from the back row. A more nuanced fix requires more space (and therefore repointing code).
Modular elemental weaknesses from armor
By default, armor that resists Ice or Fire is hardcoded to give a weakness to the opposing element, unless your equipment protects against Fire,Ice and Lightning all at once. This code ties elemental weaknesses to a byte in armor's affinity data instead:
Equipment (including weapons!) can have elemental weaknesses that apply to the actor (byte 0x1 in affinity data):
Start of Battle $9F440: 4178 0023 0B43 A08C 1FF0 A8FC 4178 0B43 A08D 1FF0 A3FC 4178 0B43 E08D 1FF0 9EFC 4178 0B43 208E 1FF0 99FC 4178 0B43 2222 AB54 28E0
During Battle $9DA2E: 4578 B88C 21F0 ADF9 4078 0543 B88D 21F0 A8F9 4078 0543 F88D 21F0 A3F9 4078 0543 388E 21F0 9EF9 4078 0543 2221 7554 29E0 0000
Monsters' basic attacks can be imbued with elements (byte 0x6 in monster elemental data):
(ASM) $7F7000: 5088 A083 9088 2084 9079 6076 3188 7046 0430 0047
(ASM) Link from $93156: 0148 2BF0 12FE 01707F08
Simple- this lets you have Fiery Hounds attack with a Fire element. Handle with care: elemental physical attacks do triple damage when hitting a weakness!
Reworked Boss Bit vs Status system
By default, enemies with the Boss Bit are protected against all forms of status (but Slow/Sap), and a few other things besides. This code moves it closer to the SNES system, where status spells only fail against a boss if the spell also has a boss bit.
New system: Boss bit only prevents status spells if they have a boss bit too!
Regular status resistances still apply, however.
Byte +$07 of spell data is the boss bit; if bit 00 is set, the spell will fail against enemies with the boss bit.
Status spell logic:
$8B02E: 5B49 084B 795A 0901 5B18 D879 0121 0140 0029 06D1 09E0
$8B054: 2890E008
Updating Bestiary screen:
$121D0: 00000000
That's all I've got for now, but I might have some other things to show at another time.
Allow monsters to use their Magic Defence Multiplier
Normally, a monster's MDef Multiplier in the ROM is never written to their RAM battle data. To undo this, make the following change:
$93082: Write 0000
Note that all monsters have zero Magic Evasion by default, so you'd need to give them values yourself.
Back Row functions almost properly
In the European version, melee weapons have no penalty to Attack or Precision for attacking from the back row, while the actual long-range weapons (Bows, Harps, Boomerangs and Whips) do receive a penalty. To fix:
$8A858: 07D1
$8A868: 00D0
Currently my code fixes this by making your attack Back Row-Ok if you have any long-ranged weapons equipped, which means that Edge with a katana and boomerang can attack at full power from the back row. A more nuanced fix requires more space (and therefore repointing code).
Modular elemental weaknesses from armor
By default, armor that resists Ice or Fire is hardcoded to give a weakness to the opposing element, unless your equipment protects against Fire,Ice and Lightning all at once. This code ties elemental weaknesses to a byte in armor's affinity data instead:
Equipment (including weapons!) can have elemental weaknesses that apply to the actor (byte 0x1 in affinity data):
Start of Battle $9F440: 4178 0023 0B43 A08C 1FF0 A8FC 4178 0B43 A08D 1FF0 A3FC 4178 0B43 E08D 1FF0 9EFC 4178 0B43 208E 1FF0 99FC 4178 0B43 2222 AB54 28E0
During Battle $9DA2E: 4578 B88C 21F0 ADF9 4078 0543 B88D 21F0 A8F9 4078 0543 F88D 21F0 A3F9 4078 0543 388E 21F0 9EF9 4078 0543 2221 7554 29E0 0000
Monsters' basic attacks can be imbued with elements (byte 0x6 in monster elemental data):
(ASM) $7F7000: 5088 A083 9088 2084 9079 6076 3188 7046 0430 0047
(ASM) Link from $93156: 0148 2BF0 12FE 01707F08
Simple- this lets you have Fiery Hounds attack with a Fire element. Handle with care: elemental physical attacks do triple damage when hitting a weakness!
Hey, Grimoire - do you think the key to displaying damage might be running the subroutine at $03/CA7E? I've been looking over your command disassembly notes. It seems this subroutine runs for every damaging command except Magic (which, IIRC, deals damage differently than everything else anyway), including (and this is the intriguing part) Steal only if the failed steal deals damage.
Even if that's not it, I'm thinking the key must be embedded in the commands' routines. It's certainly not set before the command runs, and the only stuff that seems to run differently after the command runs depends on things that happen when the command runs...
I don't remember who I was watching the other night, but you can watch me if you like: http://www.twitch.tv/entroperzero/profile/past_broadcasts
I'll probably be streaming more this week, usually around 9 PM EDT.
I found this via Twitch, while streaming and watching Zelda Randomizer runs. Been enjoying my playthrough so far. :) I'm in the Eblan Cave now, being hassled by constant surprise- and back-attacks from 6 bats. The darn things take a dozen actions before I can take one.
I was really confused in Troia. There weren't any plot clues, so I went to the magnetic cave, thinking something might happen. The game wouldn't let me in, saying the magnetic field made all my gear heavy, so I unequipped everything I thought was metal... same message. I went through this process several times, finally just unequipping everything (which required going back to town to sell some stuff and free up space), and it still wouldn't let me in.Anyway, I obviously did figure it out eventually.
I really liked the little tweaks to the writing at Mt. Hobs and Fabul, and I loved the changes at Baron and the Misty Mountains. Edward is pretty good now, I was actually sad to see him go.
The difficulty balance has been okay. Scarmig was hard, but not that hard. The hardest thing has been surviving without any healing and going through potions like candy. I always feel like I'm slightly underleveled, even though I don't run from battles much.
Which index spells would those be?
Suppressing the spell name: We could use one of the already name-suppressed spells and turn it into "Tackle", damage based on caster's HP. The command handles setting his HP afterwards anyway right?
Critical: In the regular command information, there are two "disable if" bytes; one for permanent statutes and one for temporary. Currently, the only one using the temporary status byte is Kick,which is disabled under Float. Would it be possible (or feasible) to change it so that it checks the category of statuses that Critical falls under? If so, it would then be a simple matter of setting the corresponding flag in FF4kster.
