A single store instruction can turn on a hardware timer, start a DMA transfer, or tell a network controller that there is work waiting. From the software side, it looks like writing to a memory address. From the hardware side, it is a command to a device. Nothing in the instruction itself makes this distinction. The same mechanism the CPU uses to... Weiterlesen: What Is Memory-Mapped I/O? How Does the CPU Talk to Hardware Through …
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What Is Memory-Mapped I/O? How Does the CPU Talk to Hardware Through Memory?
A single store instruction can turn on a hardware timer, start a DMA transfer, or tell a network controller that there is work waiting. From the software side,…
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