Mis-aligned pointers on x86

Question

Can someone provide an example were casting a pointer from one type to another fails due to mis-alignment?

In the comments to this answer, bothie states that doing s

Answer 1

There is an additional condition, not mentioned, for EFLAGS.AC to actually take effect. CR0.AM must be set to prevent INT 17h from tripping on older OSes predating the 486 that have no handler for this exception. Unfortunately, Windows do not set it by default, you need to write a kernel-mode driver to set it.