OS Device Controllers
The input/output units consists of the following two parts:
- Mechanical component
- Electronic component (device controller)
Basically, device controllers are the electronic components of input/output units.
Device controller can also called as adapter.
The mechanical component of the input/output unit is the device itself whereas the electronic component or device controller or adapter takes the form of a printed circuit card that can be inserted into an expansion slot.
Usually, the controller card has a connector on it, just to help in plugging the cable leading to the device controllers can handle many identical devices.
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