Author Topic: Charm Details  (Read 3550 times)

Geiger

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Charm Details
« on: July 30, 2007, 03:55:24 pm »
Here's a thread discussing Ayla's Charm ability from my team's internal database.  Some of this information is also in the Offsets Guide.

Quote
Geiger

01E9D5 - Beginning of charm processing
0C235C - Charm chance

Also of note, normally, Ayla has a fixed 27.7% chance to charm an item.  With
the Charm Top, this chance is tripled to just over 82.4%.

All determination of whether you get the item or not is done well before Ayla
even fluffs her hair.

Have not checked into Twin Charm yet.

JLukas

Interesting stuff.  From watching what's getting stored to 7EAEE7 and 7E0016,
Twin Charm gets the byte at 0C2464 ($50).  In other words, 31.4%  Hmm, is that
correct?  That isn't much of an upgrade.

Breakpoint C1D5EF is worth noting.  When you perform an attack or tech, it
loads 12 bytes of data (starting at 0C213F), the second of which is the %
chance?

Trying to break down the Charm code further:

C1E9D5   C1E9DA   CODE   N   Start of Charm processing
C1E9DB   C1E9DE   CODE   N   Check if Charm Top is equipped
C1E9DF   C1E9DF   DATA   N   Charm Top item index ($A5)
C1E9E0   C1E9E1   CODE   N   Check if Charm Top is equipped
C1E9E2   C1E9E9   CODE   N   Charm Top equipped, increases Charm chance to
82.4%

C1EA27   C1EA3F   CODE   N   Charm - stolen bit $80 and gets item reward index
C1EA40   C1EA56   CODE   N   Charm - stolen bit $40 and gets item reward index

(these last two lines are for resetting the enemy stolen bit in memory, so that
you can't steal the same item more than once from a single enemy)

Geiger

31.6% to be more precise (remember, 0 is also a success).  Yeah, ye olde Twin
Charm is not so hot.  But if the Charm Top still counts (and I am guessing it
does), the highest steal chance is 94.1%. Probably great for single charm
chances, like boss fights.

---

As for why its not much of an upgrade, with the Charm Top tripling the result,
the maximum value without overflow is 0x55.  A better solution would probably
have been to up the base result slightly, make Twin Charm more effective, and
only doubled the effect with Charm Top.

---

0C2A33 - Chance to get rare charm (aka normal drop)?

Code is a bit confusing, but this appears to be the value loaded and checked
against to determine if a Charm attempt results in a charm or rare charm.

For a 100% base Charm chance, use this code:  CC235C FF

---T.Geiger