Visual C++ source code

#include <conio.h>
#include <stdio.h>
#include <stdlib.h>

int main()
{

_outp(0x378,0);
_sleep(1000);
_outp(0x378,1);
_sleep(1000);

return 0;
}

Description

This example uses the _outp() function in Visual C++ , this takes 2 parameters firstly the port , in this case 0x378 which is the address of the printer port on my PC and then the value to send to the port , which in this case is either 0 or 1 which switches the LED on and off . We also use the_sleep() function for a delay so you can actually see the LED going on and off . The 1000 is the amount of milliseconds to delay for .

This code is for Windows 95 , 98 . This will not work on Windows 2000 , NT or XP.

Download

ledflashvisc++.txt