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

How software metrics is beneficial for sfotware engineer, How software metr...

How software metrics is beneficial for sfotware engineer Using software metrics, software engineer measures software processes and requirements for that process. Software measu

What is fault, A manifestation of an error in software. A fault, if encount...

A manifestation of an error in software. A fault, if encountered, might cause a failure.

What are the virtues of incremental model, What are the virtues of incremen...

What are the virtues of incremental model? i. The incremental model can be adopted when there are less number of persons associated with the project. ii. Technical risks can

Explain the term- phased, Explain the term-  Phased In this approach ...

Explain the term-  Phased In this approach only part of the new system is introduced and only when it proves to work satisfactorily is the next part introduced and so on, unti

Illustrate the symbols of a data flow diagram, Symbols of a data flow diagr...

Symbols of a data flow diagram  1. Data Flow Signifies the connectivity between various processes 2. Process   Performs some processing of input data 3. Ex

DFD AND DATA DICTIONARY, Hoosier Burger''s food ordering system dfd and dat...

Hoosier Burger''s food ordering system dfd and data dictionary

Intermediate software development, Provide an abstract superclass called En...

Provide an abstract superclass called EnergyRecord and subclasses called Contract and Transaction with default constructors (no-arg) and full-arg, overloaded constructors. Collect

Difference between restructuring and forward engineering, Problem 1. Ex...

Problem 1. Explain why the use of a standard high-level language does not guarantee that software will be portable across a range of machines 2. Draw possible data flow diag

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