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

Communications technology, COMMUNICATIONS TECHNOLOGY: The development ...

COMMUNICATIONS TECHNOLOGY: The development of communications technology is, in a sense, a symbol of man's effort to communicate rapidly over great distances. Communications te

Differentiate between programming tools and authoring tools, Diffrentiate p...

Diffrentiate programming tools and authoring tools Distinction between programming tools and authoring tools is not at first obvious. Though, authoring tools require less techn

Derivatives and applications of derivatives, What can you say about the exi...

What can you say about the existence of a stationary point in the interval [ 1; 3] for the function f (x) = x 2 2x 3.

Analysis of merge sort, i) The width of the sorting + merging circuit is eq...

i) The width of the sorting + merging circuit is equivalent to maximum number of devices needed in a phase is O(n/2). As in the above diagram maximum number of devices for a given

Interrupt handling - computer architecture, Interrupt handling: Handlin...

Interrupt handling: Handling Interrupts  Several  situations where the processor should avoid interrupt requests Interrupt-enable Interrupt-disable  Typical

Communication displays and matrix, Communication displays give support in d...

Communication displays give support in determining the frequency of communication, whether congestion in message queues or not, volume and the type of patterns being communicated e

Carry save addition and generated and propagate function, Explain carry sav...

Explain carry save addition (CSA) process. Ans: Instead of allowing the carries ripple along the rows, they can be saved and then introduced into the next roe at the right wei

What is orientation- object-oriented technology, What is Orientation-  obj...

What is Orientation-  object-oriented technology There are many characteristics of object-oriented technology. A few of these characteristics have been discussed in cour

Develop a simple patient management system, In the first part of Assignment...

In the first part of Assignment 2A you will develop a simple Patient class, representing an Patient who is to be admitted for a minor procedure that only requires a 1-2 day stay in

Data warehouse, 1) Define a job scheduling strategy that will meet business...

1) Define a job scheduling strategy that will meet business requirement of reporting availability by 6am CST for the following cubes? Show the job scheduling dependencies in a pict

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