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

State the level 3 of kpas, State the level 3 of KPAs Level 3 KPAs: ...

State the level 3 of KPAs Level 3 KPAs: 1)   Organisation Process Focus (OPF): Organisations responsibility is fixed for software process activities which improve the ul

State the categories of software maintenance, Categories of software mainte...

Categories of software maintenance There are three categories of maintenance:  i) Corrective Maintenance ii) Adaptive Maintenance iii) Perfective Maintenance

Write down the src for add a node, Write down the SRC for "Add a node" ...

Write down the SRC for "Add a node" Function Add node Description Adds a node to an existing design. Inputs Node type, Design Identifier, Node position Source

Software metrices, 1. Take a look at the code and try to understand the lo...

1. Take a look at the code and try to understand the logic, particularly, the way scrambled words are disambiguated, i.e.., whether they are matched successfully against a correct

What do you understand by the term integrity, Question: (a) What do yo...

Question: (a) What do you understand by the term "integrity"? (b) Which type of attack denies authorized users access to network resources? (c) You have discovered tha

Define maintenance, Define maintenance. Maintenance is explained as the...

Define maintenance. Maintenance is explained as the process in which changes are executed by either modifying the existing system's architecture or by adding latest components

Discuss the system quality attributes, Question 1 What are the advantages ...

Question 1 What are the advantages and disadvantages of layered systems? Question 2 Discuss the system quality attributes Question 3 Discuss the six components of

Write about the types of project plan, Write about the types of project pla...

Write about the types of project plan. Quality plan - This plan explains the quality procedures and standards that will be used in a project. Validation plan - This plan explai

How is the state diagram helpful to an engineer, Problem: a) Assume a w...

Problem: a) Assume a washing machine. List all possible states of the washing machine. Draw a state diagram showing also the events triggering the change of states where poss

What is technical review, A technical review is the review that refers to c...

A technical review is the review that refers to content of the technical material being reviewed.

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