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Why is the XOR operation not toggling the player variable in my x86 assembly tic-tac-toe game?

Posted by Marvee Amasi
4:19 am
21/11/2024

I am working on a text based tic-tac-toe game for some users, using x86 assembly on an Intel Core i7 12700K systems running Ubuntu 22.04. I’m using NASM assembler and GNU Linker for development.
I am beginning to have an issue with the `change_player` function. The code attempts to toggle the player variable between “0” and “1” using XOR, **but the value remains unchanged**.

What is causing the player variable to not be modified as expected?
Are there any issues with memory access or data manipulation in the change_player function?
What are the recommended approaches for managing player turns please ?
https://github.com/Marveeamasi/Tricky-tac-toey/blob/main/assembly/game.asm