"If your name's not down, you're not coming in!" - How the CPU's "Bouncer" keeps some memory off-limits. Matt Godbolt continues the series on low-level computing. #computerscience #cpu #computing Computerphile is supported by Jane Street. Learn more about them (and exciting career opportunities) at: This video was filmed and edited by Sean Riley. Computerphile is a sister project to Brady Haran's Numberphile. More at