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

Determine a sample rate required for telephone conversation, A sample rate ...

A sample rate of            is required for a good quality representation of telephone conversation. A sample rate of 50 times/second /mile of distance travelled are needed fo

What are the mapping techniques, What are the mapping techniques? a)Dir...

What are the mapping techniques? a)Direct mapping b) Associative mapping c)  Set associative mapping

Explain the basic architecture of digital switching systems, Explain the ba...

Explain the basic architecture of digital switching systems. An easy N X N time division space switch is demonstrated in figure. The switch can be shown in an equivalence for

What is content addressable memory, What is content addressable memory? ...

What is content addressable memory? The memory unit accessed by the content is known as an associative memory or content addressable memory. This type of memory is accessed con

Show the major benefits of microprocessor, Q. Show the Major benefits of mi...

Q. Show the Major benefits of microprocessor? Microprocessor is a complete CPU on a single chip. The major benefits of microprocessor are:  Powerful butCompact; can

Distinguish between complex type and simple type elements, Problem: (a)...

Problem: (a) (i) Distinguish between Complex Type and Simple Type elements. (ii) List two benefits while using XSDs in XML data modeling. (b) Both XML schema and XSL u

Determine the maximum amplitude of delta modulator, (a) Consider a sinusoid...

(a) Consider a sinusoidal signal m(t) = A cos(2πfmt) applied to a delta modulator with step size Δ. Determine the range of the step size so that slope overload will be avoided. Ass

What happens if a function module runs in an update task, What happens if a...

What happens if a function module runs in an update task? The system performs the module processing asynchronously.  Instead of carrying out the call immediately, the system w

Draw layout cells in a table, Now add layout cells into which you will add ...

Now add layout cells into which you will add text about travel locations. 1.  In Objects panel, click the Draw Layout Cell icon and move the pointer to layout table you just dre

How cloud can be used in event schedules, How cloud can be used in Event Sc...

How cloud can be used in Event Schedules and Management with an example. Web-based calendars can be used to post dates and schedules for specific public events, such as school

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