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

Define baud rate, Define baud rate The rate of data transfer in serial...

Define baud rate The rate of data transfer in serial data communication is signified in bps. Bits per second (bps) is the rate of transfer of information bits. Baud is the num

Differentiate between unit testing and integration testing, Unit testing an...

Unit testing and integration testing: Unit testing focuses on the least element of software design by the module. Unit test is conducted on every of the modules to uncover er

Characters in vi editor, What is the command used to replace many character...

What is the command used to replace many characters in Vi Editor? Ans) For replace most of the character in vi editor press esc key and then press R for change many character.

Explain token ring, Explain Token Ring. Token Ring: A token ring is ...

Explain Token Ring. Token Ring: A token ring is a collection of single point -to-point links, which arise from a circle. In a token ring a special bi t pattern, termed as th

Explain the concept of top-down design for a program, Explain the concept o...

Explain the concept of top-down design for a program. Top down Design: A top-down approach is fundamentally breaking down a system to gain insight into its compositional s

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

Define the object orientation and its analysis, Object Orientation and Anal...

Object Orientation and Analysis An Object is anything that exists within the problem domain that can be recognized by data and/or behaviour. An example of an object is a bike.

Conversion of fractional number into its binary number, Conversion of fract...

Conversion of fractional number 0.6875 into its equivalent binary number ? Ans. Multiply the fractional number 0.6875 with 2 until the remainder becomes 0 that is, Ther

Subtraction 11011-11001 using 2's complement, Subtraction 11011-11001 using...

Subtraction 11011-11001 using 2's complement. Ans. 11011 - 11001 = A - B 2's complement of B = 00111 1 1 0 1 1 + 0 0 1 1 1 1 0 0 0 1 0 Ignore carry to get answer as 00010 = 2.

Time complexity in the worst case, Speicified the following piece of code: ...

Speicified the following piece of code: int i = 1; int j = 4; while (i     {      if (i%3 == 0) i+=3;      else i+=4;        if (j%2 == 0) j*=4;      els

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