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

How can data and instructions are put into the computers, Q. How can data a...

Q. How can data and instructions are put into the computers? The data and instructions to a computer are provided by external environment. It determines that input devices are

DFD, Draw the Context level DFD for the Safe home Software.

Draw the Context level DFD for the Safe home Software.

Explain about the term middleware, Explain about the term Middleware. M...

Explain about the term Middleware. Middleware is the term frequently used to explain the application or business logic present within an application server. Unfortunately, simi

Explain multihomed host, Write short notes on the Multihomed host. A ho...

Write short notes on the Multihomed host. A host computer that connects to multiple networks is termed as multi-homed host. Multihoming is occasionally used to raise reliabilit

Define the heat transfer processes, Heat Transfer Coursework An interna...

Heat Transfer Coursework An internal combustion engine of a passenger car is operating at steady state conditions e.g. constant speed (r.p.m.) and load (torque), so the engine

What is enctype, ENCTYPE="application/x-www-form-urlencoded" and in its pl...

ENCTYPE="application/x-www-form-urlencoded" and in its place use ENCTYPE="text/plain". The subsequent illustration displays a general form which includes some of the commo

Learning weights in perceptrons, Learning Weights in Perceptrons In det...

Learning Weights in Perceptrons In detail we will look at the learning method for weights in multi-layer networks next chapter. The following description of learning in percept

C++, Write a program to find the area under the curve y = f(x) between x = ...

Write a program to find the area under the curve y = f(x) between x = a and x = b, integrate y = f(x) between the limits of a and b. The area under a curve between two points can b

Two ways in which one can retrieve data from tables, In general what are th...

In general what are the two ways in which one can retrieve data from tables? Using Select statements, Database Program.

What are the advantages of ccs over in-channel signalling, What are the adv...

What are the advantages of CCS over in-channel signalling? The advantages of CCS over in-channel signalling are given below: a. Information can be exchange among the process

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