//LPTCHKO.C		test LPT output for SIDI
//S57UUU may 007

#include<stdio.h>
#include<dos.h>       //inportb


int LPT=0x378;

//****************************************************************

int main()
{
printf("\n\nToggling LPT port pins: pin2=0.5Hz  pin3=0.25Hz");
printf("\n\nPress any key to exit\n\n");
while (kbhit()==0)
	{
	outportb(LPT,0xFC);
	sleep(1);
	outportb(LPT,0xFD);
	sleep(1);
	outportb(LPT,0xFE);
	sleep(1);
	outportb(LPT,0xFF);
	sleep(1);
	}
}