An executable software model of the whole system, built before its hardware exists, that runs the real boot code, firmware and software so they can be developed and tested early. It covers the processors, chips, peripherals and board-level devices at the fidelity each needs.
Model Work product in the System development lifecycle
It lets firmware and software start months before boards or silicon exist and gives them a platform that is cheap to copy, easy to debug and available to every developer. Its value depends on stated fidelity, so teams know which results carry over to hardware.
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