BSS isn't stored in the image that the loader brought into memory. We
just use @func{memset} to zero it out. The other task of
@func{ram_init} is to read out the machine's memory size from where
BSS isn't stored in the image that the loader brought into memory. We
just use @func{memset} to zero it out. The other task of
@func{ram_init} is to read out the machine's memory size from where