Linux can run on only 4MB of SRAM — Azure Sphere and SudoMaker's X1501 Pico show off the extremes of Linux's small-scale potential
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Microsoft's Azure Sphere module with 4MB SRAM and SudoMaker's X1501 Pico SoM with 8MB RAM show off two facets of mainline Linux's ability to scale way, way down in both size and power.