I/O System

Question 1

I/O devices?

Answer 1

Storage
Transmission
Human-Interface

Question 2

Common concepts?

Answer 2

Port
Bus
Controller

Question 3

PCI?

Answer 3

Peripheral Component Interconnect is a bus used to attach hardware devices to a computer. It supporting control, data and addressing functions of the processor.

Question 4

IDE?

Answer 4

Integrated Drive Electronics is used to connect storage devices such as hard drives to the mother board

Question 5

SCSI?

Answer 5

Small Computer System Interface

Card allows devices such as hard drives, scanners, printers, plotters to communicate with the OS across the SCSI bus.

Question 6

Expansion Bus?

Answer 6

An i/o pathway from CPU to peripheral devices

Question 7

Interrupts?

Answer 7

3 Instruction cycles
CPU Interrupt-request line
Interrupt Handler receives interrupts
Interrupt Vector to dispatch interrupt to correct handler.

Question 8

DMA?

Answer 8

Direct Memory Access
used to avoid programmed I/O
Requires DMA controller
Bypasses CPU