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

What are the different tones used in strowger telephony, What are the diffe...

What are the different tones used in strowger telephony? Explain with the help of waveforms and the timings. Dial Tone: it is used to indicate that the exchange is ready to r

Padovan string, how to write this program,what are the declaration and func...

how to write this program,what are the declaration and function are needed in java program in java // aakash , suraj , prem sasi kumar kamaraj college program 1 : pack

Radius of curvature in differential calculas, find the radius of curvature ...

find the radius of curvature at the point (3,3) at a point x3+xy2-6y2=0?

Why we use debugger, Q. Why we use Debugger? Debugger is a program whic...

Q. Why we use Debugger? Debugger is a program which allows the user to test as well as debug the object file.  Theuser can use this program to perform subsequent functions.

What is called that switch if switch capacity is full, When a switch capaci...

When a switch capacity is full, calls coming into that switch are said to be                 . (A)  open                                            (B)  shorted (C) bloc

Build data flow diagrams showing functional dependencies, Build data Flow d...

Build data Flow diagrams showing functional dependencies Data flow diagrams are very useful for showing functional dependencies. In data flow diagrams processes are indicated

Background, Background, Examples and Hypothesis: Now we will switch of...

Background, Examples and Hypothesis: Now we will switch off with three logic programs. So very firstly, we will have the logic program representing a set of positive examples

How music is produced and generated - cad, How music is produced and genera...

How music is produced and generated - CAD Computer software and hardware advances have changed how music is produced and generated. Some of the primary reasons for this have

Define the time required by sector to reach below read/write, is the time r...

is the time required by a sector to reach below read/write head. Latency Time is the time needed by a sector to reach below read/write head.

Difference between property get, Set Value is ready to ActiveX Object from ...

Set Value is ready to ActiveX Object from the form. Let Value is retried to ActiveX Object from the form. Get- Assigns the value of an expression to a variable or property.

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