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

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

what is hatley pirbhai extension and what is its use

Find the degree of capability of software reliability model, Q. Define capa...

Q. Define capability. What are the quantities that determine the degree of capability of a software reliability model? Ans: Capability demotes to the ability of the model to

Explain core dumps, Core dumps Core dumps are a debugging method. A pri...

Core dumps Core dumps are a debugging method. A printout of all relevant memory locations is obtained and studied. All dumps should be well documented and retained for possible

Describe any 4 characteristics of distributed systems, QUESTION - Character...

QUESTION - Characteristics of DSs (a) List and describe any 4 characteristics of distributed systems. (b) State the criterion for a system to be considered as not a distrib

What are the objectives of analysis modeling, What are the objectives of An...

What are the objectives of Analysis modeling? i. To explain what the customer needs. ii. To establish a basis for the creation of software design. iii. To devise a set of

What is the objective of regression testing, The aim of regression testing ...

The aim of regression testing is to test that the fixes have not formed any other problems elsewhere. The aim is to ensure the software has remained intact. A baseline set of data

What is a software package, QUESTION a) What is a software package? ...

QUESTION a) What is a software package? b) A lot of data is collected and stored on digital medium today. Organisations rely a lot on the data for their smooth running. Desc

Explain network switching subsystem in gsm, Question: (a) (i) What are...

Question: (a) (i) What are the main components of the Network Switching Subsystem in GSM? (ii) What are the main functions of the Network Switching Subsystem? (b) What

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