Also, if you have an array living in the zeropage, and you use Zeropage,X or Zeropage,Y instructions to try to access beyond address FF, it will wrap back to 00

Also, if you have an array living in the zeropage, and you use Zeropage,X or Zeropage,Y instructions to try to access beyond address FF, it will wrap back to 00. Because it's a zeropage instruction that can't go outside the zeropage.