Methods of Device Interaction
Understand how operating systems communicate with I/O devices by exploring the two main methods: explicit I/O instructions that use privileged commands, and memory-mapped I/O which treats device registers as memory. Learn the advantages and use cases of each method to grasp efficient device interaction in modern systems.
We'll cover the following...
We'll cover the following...
Now that we have some sense of the efficiency issues involved with performing I/O, there are a few other problems we need to handle to incorporate devices into modern systems. One problem you may have noticed thus far: we have not really said anything about how the OS actually communicates with the device! Thus, the problem:
THE CRUX: HOW TO COMMUNICATE WITH DEVICES
How should the hardware ...