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- 4. Computer Organization and Architecture, 10th Edition, by William Stallings © 2016 Pearson Education, Inc., Hoboken, NJ. All rights reserved. CHAPTER 7: INPUT/OUTPUT TRUE OR FALSE T F 1. A set of I/O modules is a key element of a computer system. T F 2. An I/O module must recognize one unique address for each peripheral it controls. T F 3. I/O channels are commonly seen on microcomputers, whereas I/O controllers are used on mainframes. T F 4. It is the responsibility of the processor to periodically check the status of the I/O module until it finds that the operation is complete. T F 5. With isolated I/O there is a single address space for memory locations and I/O devices. T F 6. A disadvantage of memory-mapped I/O is that valuable memory address space is used up. T F 7. The disadvantage of the software poll is that it is time consuming. T F 8. With a daisy chain the processor just picks the interrupt line with the highest priority. T F 9. Bus arbitration makes use of vectored interrupts. T F 10. The rotating interrupt mode allows the processor to inhibit interrupts from certain devices. T F 11. Because the 82C55A is programmable via the control register, it can be used to control a variety of simple peripheral devices. T F 12. When large volumes of data are to be moved, a more efficient technique is direct memory access (DMA). T F 13. An I/O channel has the ability to execute I/O instructions, which gives it complete control over I/O operations.
- 5. Computer Organization and Architecture, 10th Edition, by William Stallings © 2016 Pearson Education, Inc., Hoboken, NJ. All rights reserved. T F 14. A multipoint external interface provides a dedicated line between the I/O module and the external device. T F 15. A Thunderbolt compatible peripheral interface is no more complex than that of a simple USB device. MULTIPLE CHOICE 1. The _________ contains logic for performing a communication function between the peripheral and the bus. A. I/O channel B. I/O module C. I/O processor D. I/O command 2. The most common means of computer/user interaction is a __________. A. keyboard/monitor B. mouse/printer C. modem/printer D. monitor/printer 3. The I/O function includes a _________ requirement to coordinate the flow of traffic between internal resources and external devices. A. cycle B. status reporting C. control and timing D. data 4. An I/O module that takes on most of the detailed processing burden, presenting a high-level interface to the processor, is usually referred to as an _________. A. I/O channel B. I/O command C. I/O controller D. device controller 5. An I/O module that is quite primitive and requires detailed control is usually referred to as an _________. A. I/O command B. I/O controller C. I/O channel D. I/O processor
- 6. Computer Organization and Architecture, 10th Edition, by William Stallings © 2016 Pearson Education, Inc., Hoboken, NJ. All rights reserved. 6. The _________ command causes the I/O module to take an item of data from the data bus and subsequently transmit that data item to the peripheral. A. control B. test C. read D. write 7. The ________ command is used to activate a peripheral and tell it what to do. A. control B. test C. read D. write 8. ________ is when the DMA module must force the processor to suspend operation temporarily. A. Interrupt B. Thunderbolt C. Cycle stealing D. Lock down 9. The 8237 DMA is known as a _________ DMA controller. A. command B. cycle stealing C. interrupt D. fly-by 10. ________ is a digital display interface standard now widely adopted for computer monitors, laptop displays, and other graphics and video interfaces. A. DisplayPort B. PCI Express C. Thunderbolt D. InfiniBand 11. The ________ layer is the key to the operation of Thunderbolt and what makes it attractive as a high-speed peripheral I/O technology. A. cable B. application C. common transport D. physical
- 7. Computer Organization and Architecture, 10th Edition, by William Stallings © 2016 Pearson Education, Inc., Hoboken, NJ. All rights reserved. 12. The Thunderbolt protocol _________ layer is responsible for link maintenance including hot-plug detection and data encoding to provide highly efficient data transfer. A. cable B. application C. common transport D. physical 13. The ________ contains I/O protocols that are mapped on to the transport layer. A. cable B. application C. common transport D. physical 14. A ________ is used to connect storage systems, routers, and other peripheral devices to an InfiniBand switch. A. target channel adapter B. InfiniBand switch C. host channel adapter D. subnet 15. A ________ connects InfiniBand subnets, or connects an InfiniBand switch to a network such as a local area network, wide area network, or storage area network. A. memory controller B. TCA C. HCA D. router SHORT ANSWER 1. Interface to the processor and memory via the system bus or central switch and interface to one or more peripheral devices by tailored data links are two major functions of an _____________. 2. An external device connected to an I/O module is often referred to as a __________ device. 3. We can broadly classify external devices into three categories: human readable, communication, and __________. 4. The U.S. national version of the International Reference Alphabet is referred to as __________.
- 8. Computer Organization and Architecture, 10th Edition, by William Stallings © 2016 Pearson Education, Inc., Hoboken, NJ. All rights reserved. 5. The categories for the major functions or requirements for an I/O module are: control and timing, device communication, data buffering, error detection, and _________. 6. In __________ mode the I/O module and main memory exchange data directly, without processor involvement. 7. There are four types of I/O commands that an I/O module may receive when it is addressed by a processor: control, test, write, and _________. 8. When the processor, main memory, and I/O share a common bus, two modes of addressing are possible: memory mapped and ________. 9. The ________ is a single-chip, general-purpose I/O module designed for use with the Intel 80386 processor. 10. A ________ controls multiple high-speed devices and, at any one time, is dedicated to the transfer of data with one of those devices. 11. In a _________ interface there are multiple lines connecting the I/O module and the peripheral and multiple bits are transferred simultaneously. 12. In a ________ interface there is only one line used to transmit data and bits must be transmitted one at a time. 13. The most recent, and fastest, peripheral connection technology to become available for general-purpose use is __________, developed by Intel with collaboration from Apple. 14. ________ enables servers, remote storage, and other network devices to be attached in a central fabric of switches and links, connecting up to 64,000 servers, storage systems, and networking devices. 15. A ________ machine is an instance of an operating system along with one or more applications running in an isolated memory partition within the computer, enabling different operating systems to run in the same computer at the same time, as well as preventing applications from interfering with each other.
- 9. Exploring the Variety of Random Documents with Different Content
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