Write a program to input an address, Computer Engineering

Assignment Help:

  Write a program to input an address i.e. 20 Hex and read the byte (char) contents of that address  

Answer
 
include
void main()
{
char prompt;

Date: 26th August 2012

Version 1.0  
Function : To read an address in memory       
 Modifications:   none*/
unsigned long int address;
unsigned char *add;
unsigned char data;
printf("Please enter in the address  you want to read\n\r");
scanf("%lx",&address);
add = (unsigned char *)address;
data = *add;
printf("The data at the address %08lx is %02x\n\r",address,data);  
printf("Press and key to exit \n\r");
scanf("\n%c",&prompt);
 
}
  
Note: Care should be taken since some operating systems do not allow the user to read any memory address. The PC environment is one of these in that the PC runs under protected memory and hence looking at memory outside this area can yield 'General protection errors '. In order to access the memory in a PC, the operating system must tag the memory area for common use by the program. This is usually achieved by either writing a windows driver for the hardware/address or my poking in an allocated area i.e. allocating static space by an array or using malloc to reserve bytes of area.


Related Discussions:- Write a program to input an address

Combinatorial and scheduling problems, Combinatorial and Scheduling Proble...

Combinatorial and Scheduling Problems: One class of problems is concerned with specifying optimal scheduled. A classical example is the Travelling Salesperson Problem where

Software engineering, how many errors will be left after defect amplificat...

how many errors will be left after defect amplification and removal method on the following data design=40 analysis=30 maintenance=20 testing 35 coding 25 take 75% removal efficie

Explain the concept of thread, The Concept of Thread A thread is a sequ...

The Concept of Thread A thread is a sequential flow of control within a process. A process is able to have one or more threads. Threads have their own register-values and progr

Explain optimization process of pipelining, Q. Explain Optimization process...

Q. Explain Optimization process of Pipelining ? RISC machines can use a very efficient pipeline scheme due to the regular and simple instructions. Similarly all other instructi

Describe about pascaline, Q. Describe about Pascaline? Blaise Pascal ma...

Q. Describe about Pascaline? Blaise Pascal made very first attempt in the direction of automatic computing. He invented a device that comprised lots of gears and chains that us

What is public key cryptography, What is Public Key Cryptography Publi...

What is Public Key Cryptography Public-key cryptography is a form of modern cryptography which permits users to communicate safely without lastly agreeing on a shared secret

Define nondeterministic tm, Define nondeterministic TM?  Arbitraril...

Define nondeterministic TM?  Arbitrarily chooses move when more than one possibility exists Accepts if there is at least one computation that terminates in an acceptin

How can i delete a file, The Standard C Library function is removing. (This...

The Standard C Library function is removing. (This is thus one of the few questions in this section for which the answer is not ''It's system-dependent.'') On older, pre-ANSI Unix

Problems for decision tree learning, A ppropriate Problems for Decision Tr...

A ppropriate Problems for Decision Tree Learning - Artificial intelligence It is a expert job in AI to select accurately the right learning representation for a particular lea

Write an xpath expression, Question: (a) Explain the five different t...

Question: (a) Explain the five different types of element content defined by DTDs. (b) Compare XML schema's against DTDs. (c) Consider the following two element decla

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