Explain indirect cycle in control unit, Computer Engineering

Assignment Help:

Q. Explain Indirect Cycle in control unit?

Once an instruction is fetched the subsequent step is to fetch the operands. The instruction may have indirect and direct addressing modes. An indirect address is controlledemploying indirect cycle. The below micro-operations are needed in indirect cycle:

T1:   MAR ← IR (address)

T2:   MBR ← [MAR]

T3:   IR (address) ← MBR (address)

The MAR is loaded with address field of IR register. Then memory is read to fetch the address of operand that is transferred to address field of IR through MBR as data is received in MBR during read operation.  

So the IR now is in same state as of direct address viz as if indirect addressing hadn't been used. IR is now ready for execute cycle.


Related Discussions:- Explain indirect cycle in control unit

Determine about the security policy, Determine about the Security Policy ...

Determine about the Security Policy In the United States, the government has a separate organisation looking after the security measures and providing guidelines to all departm

Show select tag and pull down lists, The next type of input is a Pull Down ...

The next type of input is a Pull Down List. With this type you have to employ in place of and it also has a closing tag. This control is used when we have a

What is exact and approximation algorithm, What is Exact and Approximation ...

What is Exact and Approximation algorithm? The principal decision to choose solving the problem exactly is called exact algorithm. The   principal decision to choose solving th

Obstacles to is implementation - information system, Obstacles to IS implem...

Obstacles to IS implementation While information systems are now becoming the norm in most organisations the journey to this point has been a difficult one. Even in the 21st c

What is importance of xml into edi and electronic commerce, What is the imp...

What is the importance of XML into EDI and electronic commerce? XML has been explained as lightweight SGML: XML demonstrates great promise for its inherent capability to per

Power supply in computer system, Q. Power supply in computer system? Co...

Q. Power supply in computer system? Computer operate electronically- either by power supply attained from your electric plug or batteries in case of portable computers. Though

How does vb.net achieve polymorphism, How does VB.NET/C# achieve polymorphi...

How does VB.NET/C# achieve polymorphism?  VB.Net / C# provide polymorphism through the following mechanisms: 1. Inheritance - base class gives overridable methods which ar

Slot machine, A special Slot Machine is introduced in a new casino; this ma...

A special Slot Machine is introduced in a new casino; this machine has a digital interface of a 3X3 grid. An interface button named as SPIN for making the machine spin. There are f

Explain the different fields of an instructions, Explain the significance o...

Explain the significance of different fields of an instruction An instruction is a command given to a computer to perform a particular operation on some given data and the form

Write Your Message!

Captcha
Free Assignment Quote

Assured A++ Grade

Get guaranteed satisfaction & time on delivery in every assignment order you paid with us! We ensure premium quality solution document along with free turntin report!

All rights reserved! Copyrights ©2019-2020 ExpertsMind IT Educational Pvt Ltd