This seems to use modulus. The whole point of the mmap trick is to get the kernel/MMU to do the work for you, IIRC. EDIT: Oops, I see they use mirrored memory

This seems to use modulus. The whole point of the mmap trick is to get the kernel/MMU to do the work for you, IIRC. EDIT: Oops, I see they use mirrored memory here as well.