How do I access hardware on a Win-XP laptop?

[news reader]

I am learning how to read/write the RS232 port of my laptop.
First step is to just test the COM addresses.. (I know it can be found
in the hardware profile)..

Dev-C++ complains access violation/segmentation fault on that line..

I have Norton AV and Seagate Personal Firewall.. Do they affect?


Quote:
#include <stdio.h>
#include <dos.h>

int main()
{
unsigned int *ptraddr; /* Pointer to location of Port Addresses
*/
unsigned int address; /* Address of Port */
int a;

ptraddr=(unsigned int *)0x00000400;

for (a = 0; a < 4; a++)
{
address = *ptraddr;
if (address == 0)
printf("No port found for COM%d \n",a+1);
else
printf("Address assigned to COM%d is %Xh\n",a+1,address);
*ptraddr++;
}
return(0);

 

[John Harrison]

I am learning how to read/write the RS232 port of my laptop.
First step is to just test the COM addresses.. (I know it can be found
in the hardware profile)..

Dev-C++ complains access violation/segmentation fault on that line..

I have Norton AV and Seagate Personal Firewall.. Do they affect?


Quote:
#include <stdio.h>
#include <dos.h>

int main()
{
unsigned int *ptraddr; /* Pointer to location of Port Addresses
*/
unsigned int address; /* Address of Port */
int a;

ptraddr=(unsigned int *)0x00000400;

for (a = 0; a < 4; a++)
{
address = *ptraddr;
if (address == 0)
printf("No port found for COM%d \n",a+1);
else
printf("Address assigned to COM%d is %Xh\n",a+1,address);
*ptraddr++;
}
return(0);

This is not a C++ question, it is a Windows programming question, try
comp.os.ms-windows.programmer.win32 instead. You are off topic here.

john

 

[news reader]

This is not a C++ question, it is a Windows programming question, try
comp.os.ms-windows.programmer.win32 instead. You are off topic here.

john

correct, i am looking into CreateFile...etc. now.

 

[Jim Langston]

correct, i am looking into CreateFile...etc. now.

CreateFile for COM, RS232 etc.. is windows specific. try a windows
newsgroup.