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

State about the three-dimensional digitizers, State about the Three-dimensi...

State about the Three-dimensional digitizers Three-dimensional digitizers use sonic or electromagnetic transmissions to record positions. One electromagnet transmission method

Continuous or discrete - artificial intelligence, Continuous or Discrete - ...

Continuous or Discrete - artificial intelligence: The behaviour of the coming data in from the environment will change how the agent should be programming. In particular, the

What are the various address translation schemes, What are the various addr...

What are the various address Translation schemes? Explain which scheme is used in Internet? Translation from a computer's protocol address to a corresponding hardware address i

What is basic analog design, What is basic Analog Design? Analog design...

What is basic Analog Design? Analog design is rather challenging than digital design as analog circuits are sensitive to noise, operating voltages, loading circumstances and ot

Knowledge of the environment - artificial intelligence, Knowledge of the E...

Knowledge of the Environment: We must discriminate between knowledge an agent receives through its sensors and knowledge about the world from which the input comes. The world

Computer systems principles, Your program should print the inverted map to ...

Your program should print the inverted map to the screen (using a format similar to the inverter project, but you will print out the url values instead of document IDs). You can pr

How e-commerce works for the customer, The customers visit the website and ...

The customers visit the website and browse through the products, looking at pictures and products details. When the customer finds his desired product, he usually adds it to his ca

Difference between narrative form and documentary form, Question: (a) E...

Question: (a) Explain clearly the difference between a Proposal and a Treatment for a video production project. (b) Explain clearly the difference between Narrative form an

How many input ANDand OR gates are required, How many two input AND gates a...

How many two input AND gates and two input OR gates are required to realize Y = BD+CE+AB ? Ans. Here three product terms, therefore three AND gates of two inputs are needed.

What is verilog function, What is Verilog function - A function is una...

What is Verilog function - A function is unable to enable a task however functions can enable other functions. - A function would carry out its required duty in zero simula

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