Review Questions

1.	How do you accomplish the physical configuration of a hardware device?
2.	What are the four hardware settings that you use to configure computer hardware?
3.	How does an interrupt work?
4.	Which interrupt does LPT2 typically use?
5.	True or false: All devices need a reserved area of memory in which to operate (similar to Video RAM).
6.	What I/O address range is typically assigned to the primary hard disk controller?
7.	How does DMA typically work?
8.	Which DMA channel is typically assigned to the floppy disk controller?
9.	What is a software driver?
10.	True or false: A software driver will work with any operating system as long as it follows the Software Driver Association guidelines.
11.	True or false: Two hardware devices can share the same IRQ.
12.	What does DMA stand for?
13.	What does I/O stand for?
14.	What does IRQ stand for?

Answers

1.	You use a DIP switch or jumper to accomplish the physical configuration of a hardware device.
2.	Interrupts, base memory, I/O memory, DMA
3.	An interrupt enables a hardware device to interrupt the microprocessor to request attention. When the request is satisfied, the microprocessor is free to carry out its responsibilities.
4.	IRQ 5
5.	False. Not all devices need a reserved area of memory in which to operate.
6.	1F0-1F8
7.	DMA enables a device to transfer data directly to RAM without involving the processor.
8.	DMA channel 2
9.	A software driver is a special program that tells the computer how to communicate with and control a hardware device.
10.	False. There is no such thing as the Software Driver Association. Drivers are written for specific operating systems.
11.	True, provided that each device has a different I/O address.
12.	Direct memory access
13.	Input/output
14.	Interrupt request