5/31/2023 0 Comments Driver drivers teclado hp kb 0316The host controller can exist on the motherboard, or as a separate card. ![]() Wikipedia): A piece of hardware that connects the bus between the host (your PC) and the device (your external harddisk) to the internal bus (PCIe) of the host.īridge - controller. Host controller, Host bus adapter or even Host adapter are just different names for the same thing (c.f. How would then, a device such as an external keyboard connected over USB work?At the SW-level, the drivers still appear to be communicating with specific registers however, there are 2 controllers in play. For example, a driver that wants to read/write to registers on an external HDD disc controller HDD connected over SATA or over Infiniband. Host bus adapter: Translates an external bus protocol to an internal one. Also may contain DMA ability.ĭevice controller: Same as the host controller, but exists on theĮxternal device, such as a disc controller on a HDD. Responsible for translating requests from it's registers into actions: read/writing to attached devices directly. ![]() Includes register-level interface for drivers to interact with. Host controller: Circuitry that exists on the motherboard.Specifically, I am confused about the roles of the following: Starting with the CPU, or it's accompanying chipset (ex, Intel PCH), what are the various HW components involved in translating a read/write to disk, and what is their role?
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