two fetch-execute cycles, Software Engineering

Assignment Help:

Consider an 8-bit system with 32 memory locations (numbered from 0 to 31) and 8 different instructions. Assume op code for "Load Accumulator" instruction is 510 and for "Add" instruction is 210. At this moment, the program counter register PC contains the value 00100 and is about to increment, memory locations contain the following values:   

Address Contents
01101   00110110
01100   01110100
01011   10111000
:
00110   01001100
00101   10101011
00100   01111000

Perform two fetch-execute cycles, present each step of the cycles and the contents of each special-purpose register at the beginning and at the end of each step of the cycles in binary. If you believe there is no information on the contents of a particular register, indicate it as [unknown] (e.g., MDR[unknown]). If overflow occurs, the MSB is stored in a single-bit flag register and not counted in Accumulator. Express the final contents of Accumulator in both binary and decimal. For your answer, use the following table (two first lines are given as sample):

Step

PC

MAR

MDR

IR

A

PC→MAR                beginning

00101

[unknown]

[unknown]

[unknown]

[unknown]

                                          end

00101

00101

[unknown]

[unknown]

[unknown]


Related Discussions:- two fetch-execute cycles

What is exception, What is Exception? Ans) An event that causes suspensi...

What is Exception? Ans) An event that causes suspension of normal program implementation. Types contain addressing exception, operation exception, data exception, overflow excep

Software Quality Assurance - Defect Amplification and Remova, Errors from p...

Errors from previous stage Errors passed through Amplified errors Newly generated errors Errors passed to next stage Testing phase of project-A 35 35 0 5 20 Testing phase of Projec

What are the advantages of horizontal partitioning, What are the advantages...

What are the advantages of horizontal partitioning? i. Software is must be easy to check. ii. Software is handy to maintain. iii. Create fewer side effects. iv. Softwa

What is procedure, What is Procedure? Ans) The step-by-step method follo...

What is Procedure? Ans) The step-by-step method followed to make sure that standards are met.

#title.decision table, You are to create a decision table to help you decid...

You are to create a decision table to help you decide what to do for the day. If it is a weekday and it is not a holiday, then you go to work. However, if it is a weekday and it

What are the guidelines for data design, What are the guidelines for data d...

What are the guidelines for data design? i. Use systematic analysis on data. ii. Find data structures and related operations. iii. Prepare data dictionary. iv. Use inf

Hatley pirbhai, what is hatley pirbhai extension and what is its use

what is hatley pirbhai extension and what is its use

Explain about the iterative enhancement model, Iterative Enhancement Model ...

Iterative Enhancement Model This model was developed to remove disadvantages of waterfall model. In this model, phases of software development remain the same however the cons

State the advantages of prototyping, State the Advantages of Prototyping ...

State the Advantages of Prototyping Advantages of prototyping outperform problems of prototyping. Hence overall, it's a beneficial approach to develop prototype. End user can'

What is maintenance, Define maintenance. Maintenance is defined as the ...

Define maintenance. Maintenance is defined as the procedure in which changes are executed by either modifying the existing system's architecture or by adding new mechanism to t

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