Cheat Engine

[bshi02]

Hello.
I have tried to find an address in grandia1 saturn version in order to make a cheat code which is enable to level up magic level as fast as I can.
So I finally located an address in cheat engine(SSFa.exe+563E611) which enable to manipulate a character's magic experience in the battle mode.
However, soon I noticed that whenever I modified its value and actived this address, It made severely distorted background graphic.
So I really want to find another address which actually triggered to change this magic experience value whenever I cast a magic spell in the battle mode.

I clicked "find out what writes to this address(SSFa.exe+563E611)" and casted a magic spell in the battle mode then, it displayed below screen.

I want to look through flow of opcodes(traceback),But It did not displayed any opcode which was previously executed before opcode of "00B43100 -and ecx,000FFFFF".
Is there any method to see more opcode which was executed before opcode of "00B43100 -and ecx,000FFFFF"?