[Verse 1] When your system's running tight on space And sixteen bits just can't keep pace Memory mapping shows the way To stretch your limits day by day Bank switching opens hidden doors Reveals the memory that's in store One address space becomes much more Through clever tricks we can't ignore [Chorus] Map it, swap it, overlay the code Switch the banks when you need to load Virtual memory in disguise Making small systems reach the skies Map it, swap it, don't run out of room Bank switching saves you from your doom Advanced techniques that work so well Memory magic we can tell [Verse 2] Overlay managers take control Loading segments on a roll When function A is done its part Function B can take its start Same address space, different code Following the overlay road Runtime loading, smart and clean Best efficiency you've seen [Chorus] Map it, swap it, overlay the code Switch the banks when you need to load Virtual memory in disguise Making small systems reach the skies Map it, swap it, don't run out of room Bank switching saves you from your doom Advanced techniques that work so well Memory magic we can tell [Bridge] Hardware registers hold the key Selecting which bank you can see Common area stays in place While switched regions change their face MMU helps with the translation Virtual to physical relation Tiny systems think they're grand With more memory than they planned [Verse 3] Page tables map the virtual space Physical memory finds its place Translation lookaside buffer fast Makes memory access unsurpassed Copy on write and demand paging Keep the system from aging Full stack engineers must know How memory systems really flow [Chorus] Map it, swap it, overlay the code Switch the banks when you need to load Virtual memory in disguise Making small systems reach the skies Map it, swap it, don't run out of room Bank switching saves you from your doom Advanced techniques that work so well Memory magic we can tell [Outro] From embedded chips to servers tall Memory mapping conquers all Bank by bank and page by page Welcome to the memory age
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