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

Describe basic steps in software cost estimation, Question: (a) Describ...

Question: (a) Describe fully the first five basic steps in software cost estimation. (b) What are the main differences between COCOMO1 and COCOMO2 cost estimation models?

Factory method, For this assignment you will create a program called MMWord...

For this assignment you will create a program called MMWordFix (Multi-Mode WordFix). This program prompts the user to select one of three word filters (uppercase, lowercase, encryp

Define the load address for the first word of the program, Define the Load ...

Define the Load address for the first word of the program is known as Load address origin is called as a Load address for the first word of the program

Define the concept of SRS, Define the concept of SRS An SRS clearly def...

Define the concept of SRS An SRS clearly defines following:  • External Interfaces of the system: They identify information which is to flow 'from and to' to the system.

What is variable trace, 1. "Variable trace" is a (computer) record of the n...

1. "Variable trace" is a (computer) record of the names and the values of variables accessed and/or changed during the implementation of a computer program. 2. "Value trace" is

Explain the reuse maintenance model, Explain the reuse maintenance model wi...

Explain the reuse maintenance model with the help of a diagram. Reuse maintenance model: This model is based on the principal  that maintenance could be viewed as an activity i

What quality would you look for when hiring a test engineer, What qualities...

What qualities would you look for when hiring a test engineer? - Test to break attitude - Desire for quality and attention to details. - Tact and diplomacy when dealing w

What is sei capability maturity model, What is SEI capability maturity mode...

What is SEI capability maturity model? Initial Essentially uncontrolled Repeatable Product management procedures explained and used Defined Proc

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