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

States the term ip addresses, States the term IP addresses? IP address ...

States the term IP addresses? IP address considers to the name of a computer onto a network, as the Internet. a. An Identifier for a device or computer onto a TCP/IP network

Use of hypertext links in internet access, Use of Hypertext links in Intern...

Use of Hypertext links in Internet access From the user's point of view, the Web having of a vast, worldwide collection of documents i.e. pages. Every page may have links (poin

Elaborate protected mode memory addressing in brief, Elaborate protected mo...

Elaborate protected mode memory addressing in brief. Protected mode interrupt: In protected mode, interrupts have exactly the same assignments as in real mode though int

Execute sparse matrix dynamically, To execute sparse matrix dynamically, Wh...

To execute sparse matrix dynamically, Which data structure is used Linked List data structure is used to execute sparse matrix dynamically

Difference among msgbox statement and msgboxq function, MsgBox is a built i...

MsgBox is a built in VB function which shows a Message Box and MsgBoxQ is a function definite by the user.

Define memory cycle time, Define memory cycle time? It is the time dela...

Define memory cycle time? It is the time delay needed between the initiations of two successive memory operations. Eg. The time among two successive read operations.

Types of pipelines - computer architecture, Types of Pipelines: Instr...

Types of Pipelines: Instructional pipeline  It is used where different stages of an instruction fetch and execution take place in a pipeline. Arithmetic pipeline

What is assembler directive, What is assembler directive? SUM EQU 200 ...

What is assembler directive? SUM EQU 200 Assembler directives are not instructions that will be implemented. It easily informs the assembler that the name SUM should be chan

Multi-layer network architectures, Multi-Layer Network Architectures: ...

Multi-Layer Network Architectures: As we considered we saw in the previous lecture that perceptrons have limited scope in the type of concepts that they can learn - but they c

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