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

Labels in the sub trees, A sorting method which uses the binary tree concep...

A sorting method which uses the binary tree concept such that label of any node is larger than all  the labels in the sub trees, is called A Sorting method which uses the binar

:P, My name is mrs flo and i apporve dubstep, do you apporve it?

My name is mrs flo and i apporve dubstep, do you apporve it?

Define dynamic linking, Define dynamic linking.  Dynamic linking is sam...

Define dynamic linking.  Dynamic linking is same to dynamic loading, rather that loading being postponed unless execution time, linking is postponed. This feature is usually us

Detemine the major building blocks of uml, Detemine the major building bloc...

Detemine the major building blocks of UML UML could be used in visualizing, specifying, constructing and documenting object oriented systems. The major building blocks of UML a

Define the circular shifts, Q. Define the Circular shifts ? Circular sh...

Q. Define the Circular shifts ? Circular shifts ROTATE RIGHT andROTATE LEFT. Bits shifted out at one end of word are not lost as in a logical shift however are circulated back

Arc consistency, Arc Consistency: There have been many advances in how...

Arc Consistency: There have been many advances in how constraint solvers search for solutions (remember this means an assignment of a value to each variable in such a way that

Why we need parallel programming languages, Q. Why we need parallel program...

Q. Why we need parallel programming languages? The parallel programming languages are created for parallel computer environments.  These are developed either by creating new la

Define the internal users of system, Q. Define the Internal Users of system...

Q. Define the Internal Users of system? Internal Users are employees of business for that an information system is built. Illustration are clerical and service staff, technic

Compare pre-emptive and non-preemptive scheduling policies, Compare pre-emp...

Compare pre-emptive and non-preemptive scheduling policies. We preempt the currently executing process in preemptive scheduling. In non-preemptive we permit the current process

What is repository info. systems, What is Repository Info. Systems? It ...

What is Repository Info. Systems? It is a tool with which you can create data stored in the ABAP/4 Dictionary available

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