I/O Flashcards
1
Q
A ________ is an electronic component of a device and establishes the standard used by the device.
A
Device controller
2
Q
What is a type of hardware I/O in which the device controller uses control registers in order to facilitate communication between the device and the OS.
A
Memory-mapped I/O
3
Q
Describe a control register.
A
CPU writes to registers on the controller
4
Q
How does programmed I/O work?
A
It transfers data between the processor and the I/O module
5
Q
What if buffer
A
a buffer allows device to read/write data without flooding process with interrupts
6
Q
Describe DMA-based I/O.
A
let’s DMA handle the I/O transaction and reduces need for interrupts
7
Q
Describe device independence
A
Can access any device without having to specify the device.
