A formula request.

bht · January 28, 2014, 01:48:38 pm

If it's simple enough, could anyone make an ASM that turns either 27-Steal Gil or 28-Steal Exp (if one of them happens to be easier) into:
(MA+PA)/2*Y Status ME (Magic Attack/Defend Up, Shell) (and works outside of ePSXe).
Thanks.

bht · January 29, 2014, 08:01:37 pm

If it helps, I've been using one for another spell that is -almost- what I want:
Drawout to (MA+PA)/2*Y by Pride

I basically need the Formula 20 from there, just on a different slot, magic-evadeable and not tied to the Katana Inventory.
If there is an issue with Steal Gil/Exp, there's several others I'm not using, those two were just the first to pop to mind.
Thanks again.

Glain · February 16, 2014, 07:35:22 pm

So I figured I'd randomly do an ASM request...

I think this should work. This patch will replace the Steal Exp formula with the one you mentioned. I don't have anything to test with except emulators (tested with pSX) so you'll have to let me know if it works for you.

<Patch name="Formula 28 edit">
<Location file="BATTLE_BIN" offset="122870" mode="ASM">
addiu sp, sp, -8
sw ra, 4(sp)

jal 0x1885b8 # Magic Evade
nop
bne v0, zero, formula_end
nop

lui t0, 0x8019
lw t1, 0x2d94(t0) # Load Attacker's Stats
lbu t2, 0x38fa(t0) # Load Ability Y
lbu t3, 0x0037(t1) # Load Attacker's MA
lbu t4, 0x0036(t1) # Load Attacker's PA
sh t2, 0x38d0(t0) # Store Ability Y as YA

addu t5, t3, t4
addiu t5, t5, 1
sra t5, t5, 1
sh t5, 0x38ce(t0) # Store (PA + MA) / 2 as XA

jal 0x00185ffc # Get Elemental Boost
nop
jal 0x00188744 # Magic XA Modifications
nop
jal 0x0018877c # Magic Damage Calculation
nop
bne v0, zero, formula_end
nop
jal 0x001870fc # Elemental Absorption
nop
jal 0x00187eb4 # Status
nop

formula_end:
lw ra, 4(sp)
addiu sp, sp, 8
jr ra
nop
</Location>
</Patch>

Final Fantasy Hacktics

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A formula request.

bht

January 28, 2014, 01:48:38 pm

bht

January 29, 2014, 08:01:37 pm #1

Glain

February 16, 2014, 07:35:22 pm #2