The original Model B Rev 2.0 Raspberry Pi had 512 MB of SDRAM (synchronous dynamic random access memory), while the older revisions and the Model A had 256 MB. Modern Pi’s now come equipped with 1 GB of RAM except for the Raspberry Pi Zero, which has 512 MB. Contrast this to the AVR class ATmega328P, which has 2 KB of static RAM!
There isn’t much about the memory hardware that concerns the average Pi developer because the operating system provides a rich facility for managing program use. However, let’s examine some useful Raspbian Linux interfaces that inform us how that memory is utilized. You’ll ...
