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

Memory cache hierarchy and virtual memory system, 1. Detail for each of the...

1. Detail for each of the four following MIPS instructions, which actions are being taken at each of their five steps. Do not forget to mention how and during which steps each inst

Explain what is a macro and why is it important, Question 1: Spreadshee...

Question 1: Spreadsheet packages are widely used in Business. a) Explain why spreadsheets are so useful. b) Spreadsheet files are sometimes saved for use by other software p

Sap system configuration, SAP system configuration includes It include...

SAP system configuration includes It includes :- a) Dialog tasks b) Update tasks.

Advanced topics of html, HTML is made up of many elements, a lot of them ar...

HTML is made up of many elements, a lot of them are overlooked. Though you can develop a Website with the basic knowledge of HTML, to take benefit of many of the advanced features,

Disk operating system, Q. Disk operating system? The operating system (...

Q. Disk operating system? The operating system (OS) is the first program that should be loaded into the memory of your PC before you can use it for any application. You can st

Give explanation of user datagram protocol, Explain UDP (User Datagram Prot...

Explain UDP (User Datagram Protocol). UDP utilizes a connectionless communication paradigm. It is an application of using UDP doesn't require preestablishing a connection befor

Explain the architecture of ss7, Explain the architecture of SS7 . A ...

Explain the architecture of SS7 . A block schematic diagram of the CCITT no. 7 signaling system is demonstrated in figure. Signal messages are passed by the central proces

How can a function return a pointer to its calling routine, How can a funct...

How can a function return a pointer to its calling routine? The general form of a function is: type_specifier function_name(parameter list) { body of function; }

Constants - first-order logic, Constants - first-order logic: Constant...

Constants - first-order logic: Constants are things that is cannot be changed, like as england, black and barbara. So then they stand for one thing only, so that can be confu

Milestones, Here are some common development milestones that  you should ai...

Here are some common development milestones that  you should aim for: 1. Send a packet over. Send an acknowledgement back. 2. Have checksum algorithm executed 3. Ability t

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