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Questions and Answers
What happens if two or more devices all want to use the bus at the same time?
What happens if two or more devices all want to use the bus at the same time?
- The bus becomes free for all devices to use simultaneously
- The devices enter into a deadlock situation
- The devices compete using a distributed arbitration process (correct)
- The arbiter issues a grant signal to the highest priority request line only
What is Daisy Chained?
What is Daisy Chained?
- A method where devices are connected in parallel to the bus grant line
- A method where devices are connected in series to the bus request line (correct)
- A method where devices are connected in series to the bus grant line
- A method where devices are connected in parallel to the bus request line
What are disadvantages of Single Bus Arbitration?
What are disadvantages of Single Bus Arbitration?
- Fixed priorities and increased arbitration time with more devices (correct)
- Low cost and independence from a central arbiter
- Limited number of connected devices and decreased bus lines requirement
- Increased fault tolerance and complexity in implementation
What is PCI bus?
What is PCI bus?
What type of arbitration is used in SCSI bus?
What type of arbitration is used in SCSI bus?
Which kind of arbitration is more Fault tolerant?
Which kind of arbitration is more Fault tolerant?
What kind of technique may result in process starvation?
What kind of technique may result in process starvation?
What is the purpose of a bus in a computer system?
What is the purpose of a bus in a computer system?
How many parts does a bus consist of?
How many parts does a bus consist of?
What is the function of the address lines in a bus?
What is the function of the address lines in a bus?
What is bus arbitration?
What is bus arbitration?
What is the role of a bus arbiter?
What is the role of a bus arbiter?
What are the types of Bus Arbitration mentioned in the text?
What are the types of Bus Arbitration mentioned in the text?
What happens if two or more devices want to use the bus at the same time?
What happens if two or more devices want to use the bus at the same time?
What does a centralized arbitration involve?
What does a centralized arbitration involve?
What are the components of a generic computer mentioned in the text?
What are the components of a generic computer mentioned in the text?
What are the advantages and disadvantages of a centralized one-level bus arbiter using daisy chaining?
What are the advantages and disadvantages of a centralized one-level bus arbiter using daisy chaining?
What are the advantages and disadvantages of a centralized two-level bus arbiter using daisy chaining?
What are the advantages and disadvantages of a centralized two-level bus arbiter using daisy chaining?
What are the advantages and disadvantages of a centralized bus arbitration with independent bus request and grant lines?
What are the advantages and disadvantages of a centralized bus arbitration with independent bus request and grant lines?
What are the advantages and disadvantages of distributed arbitration?
What are the advantages and disadvantages of distributed arbitration?
What is the purpose of a single shared bus request line in bus arbitration?
What is the purpose of a single shared bus request line in bus arbitration?
What is the purpose of multiple shared bus request with different priority levels in bus arbitration?
What is the purpose of multiple shared bus request with different priority levels in bus arbitration?
What is the configuration used in Peripheral Components Interconnect (PCI) bus?
What is the configuration used in Peripheral Components Interconnect (PCI) bus?
What happens when two or more devices want to use the bus at the same time in distributed arbitration?
What happens when two or more devices want to use the bus at the same time in distributed arbitration?
What kind of arbitration is used in SCSI bus?
What kind of arbitration is used in SCSI bus?
Which kind of arbitration offers higher reliability and is fault-tolerant?
Which kind of arbitration offers higher reliability and is fault-tolerant?
What is the role of a bus arbiter?
What is the role of a bus arbiter?
What are the three bus lines groups?
What are the three bus lines groups?
What is the purpose of bus arbitration?
What is the purpose of bus arbitration?
What are the components of a generic computer mentioned in the text?
What are the components of a generic computer mentioned in the text?
What is a bus?
What is a bus?
What is the function of the control lines in a bus?
What is the function of the control lines in a bus?
What does a centralized arbitration involve?
What does a centralized arbitration involve?
What happens if two or more devices want to use the bus at the same time?
What happens if two or more devices want to use the bus at the same time?
What are the types of Bus Arbitration mentioned in the text?
What are the types of Bus Arbitration mentioned in the text?
What happens if two or more devices want to use the bus at the same time? How is this issue resolved?
What happens if two or more devices want to use the bus at the same time? How is this issue resolved?
Study Notes
Bus Arbitration
- When two or more devices want to use the bus at the same time, a bus arbitration technique is used to resolve the conflict.
- Bus arbitration ensures that only one device can use the bus at a time, preventing data corruption and ensuring data integrity.
Types of Bus Arbitration
- Centralized Bus Arbitration: uses a single bus arbiter to manage bus access.
- Distributed Bus Arbitration: each device has its own arbiter, and devices negotiate among themselves to access the bus.
Centralized Bus Arbitration
- Uses a single bus arbiter to manage bus access.
- Can be implemented using daisy chaining, where devices are connected in a series and the bus arbiter is at the end of the chain.
- Advantages: simple to implement, low cost.
- Disadvantages: single point of failure, slower access time.
Distributed Bus Arbitration
- Each device has its own arbiter, and devices negotiate among themselves to access the bus.
- Advantages: faster access time, higher reliability, fault-tolerant.
- Disadvantages: more complex to implement, higher cost.
Bus Configuration
- PCI bus: uses a centralized bus arbitration technique.
- SCSI bus: uses a distributed bus arbitration technique.
Bus Components
- A bus consists of three groups of lines: address lines, data lines, and control lines.
- Address lines: used to specify the address of the device or memory location.
- Control lines: used to manage the flow of data and control the bus access.
Bus Arbitration Techniques
- Single Bus Arbitration: a single bus arbiter is used to manage bus access.
- Daisy Chained Bus Arbitration: devices are connected in a series and the bus arbiter is at the end of the chain.
- Independent Bus Request and Grant Lines: each device has its own request and grant lines.
- Multiple Shared Bus Request with Different Priority Levels: multiple devices share the same bus request line, but with different priority levels.
Importance of Bus Arbitration
- Ensures data integrity and prevents data corruption.
- Allows multiple devices to share the same bus.
- Enables efficient use of bus bandwidth.
Role of Bus Arbiter
- Manages bus access and ensures that only one device can use the bus at a time.
- Resolves conflicts between devices that want to use the bus simultaneously.
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Description
Test your knowledge on computer buses and their role in the organization and architecture of computer memory. Explore topics such as bus arbitration and distributed arbitration.
