Io devices and i/o subsystem and direct memory access, Computer Engineering

Assignment Help:

Why IO devices cannot be connected directly to the system bus?

Ans: The IO devices can't be directly connected to the system bus because the following reason

A) The data transfer rate of IO devices is slower that of CPU.

B) The IO devices in computer system has different data formats and work lengths that of CPU. So it is essential to use a module between system bus and IO device which is called IO module or IO system

Write the factors considered in designing an I/O subsystem?

Ans:

1. Data transfer: Amount, rate to or from device.

2. Data Location: Device selection, address of data within device (track, sector etc)

3. Memory or between an I/O device and CPU.

4. Synchronization: Output only when device is ready, input only when

Described Direct Memory Access

Ans: A modest increase in hardware enables an IO device to transfer a block of information to /from memory without CPU intervention. This task needs the IO device to produce memory addresses and transfer data via the bus by using interface controllers.

Related Discussions:- Io devices and i/o subsystem and direct memory access

Name the fastest media of data transfer, Name the fastest media of data tra...

Name the fastest media of data transfer Fiber Optic.

Update -task updates, Update -task updates are Asynchronous updates.

Update -task updates are Asynchronous updates.

Digital electronics, what is Asynchronous Finite State Machines?

what is Asynchronous Finite State Machines?

4 bit comparator, how to breadboARD THE 4 BIT COMPARATOR

how to breadboARD THE 4 BIT COMPARATOR

Explain switch statement, Switch This is another form of the multi way ...

Switch This is another form of the multi way decision. It is well structured, but can only be used in certain cases where; Only one variable is tested, all branches must

Define dynamic linking, Define dynamic linking. Dynamic linking is sam...

Define dynamic linking. Dynamic linking is same to dynamic loading, rather that loading being postponed unless execution time, linking is postponed. This feature is usually us

Ending transactions - data phase, Ending transactions: Either side may...

Ending transactions: Either side may request that a burst end after the present data phase. Simple PCI component that do not support multi-word bursts will always request this

What is a fifo, What is a FIFO? FIFO is otherwise known as 'named pipes...

What is a FIFO? FIFO is otherwise known as 'named pipes'. FIFO (first-in-first-out) is a particular file which is said to be data transient. Once data is read from named pipe,

Process of minimax algorithm, Process of Minimax algorithm: Our aim is...

Process of Minimax algorithm: Our aim is just to write the best of best score on the top branches of the tree that player one can guarantee to score if he chooses that move.

Evaluate total expense of algorithm, Q. Evaluate Total expense of algorithm...

Q. Evaluate Total expense of algorithm? Lastly, the total expense of algorithm is a product of the total number of processors required for computation and time complexity of th

Write Your Message!

Name

Email id

Message

Verfication Code

User Account

All Pages