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

Define deadlock, Define deadlock? Deadlock is a condition, wherein proc...

Define deadlock? Deadlock is a condition, wherein processes never finish executing and system resources are tied up, preventing another job from beginning. A process requests r

Functions employed for messaging passing, Q. Functions employed for messagi...

Q. Functions employed for messaging passing? The functions employed for messaging passing are: int MPI_Send(void *msgaddr, int count, MPI_Datatype datatype, int dest, int ta

Balanced trees and their operations, what is ment by avl tree n insertion n...

what is ment by avl tree n insertion n deletion ,2-3 tress insertion n deletion

Explain bus, Define bus. When a word of data is transferred among units...

Define bus. When a word of data is transferred among units, all the bits are transferred in parallel over a set of lines called bus. In addition to the lines that take the data

Program that will blink as led, Take the last two digits of your UTCID. Thi...

Take the last two digits of your UTCID. This is your duty cycle in percent. If your duty cycle is less than 10%, add 30 to your number. Create an assembly program that runs on t

How to use activex control in .net, How to use ActiveX Control in .Net ? ...

How to use ActiveX Control in .Net ? ActiveX control is a special type of COM component that handles a User Interface. Using ActiveX Control in your .Net Project is even simple

What are two methods of modifying sap standard tables, What are two methods...

What are two methods of modifying SAP standard tables? Append Structures and Customizing Includes.

Differentiate between motion and shape tween, Question: 1. In Flash, w...

Question: 1. In Flash, what is the purpose of a motion guide layer? 2. Differentiate between Motion and Shape tween. 3. Give the steps to create a layer mask in flash.

Explain the working of a binary counter, In binary counter the flip flop of...

In binary counter the flip flop of lowest order position is complemented with each pulse. This means that JK input position must be maintained with logic one

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