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



#define LPT1_ADDR 0x408
#define LPT2_ADDR 0x40A
#define LPT3_ADDR 0x40C

void checkparallelports(){


printf("Checking installed parallel ports...\n");
unsigned int lpt1 = *(unsigned int far*)MK_FP(0,LPT1_ADDR);
unsigned int lpt2 = *(unsigned int far*)MK_FP(0,LPT2_ADDR);
unsigned int lpt3 = *(unsigned int far*)MK_FP(0,LPT3_ADDR);

if (lpt1){
printf("LPT1 Address: 0x%X\n",lpt1);
}
else {
printf(" LPT1 not installed.\n");
}

if (lpt2){
printf("LPT2 Address: 0x%X\n",lpt2);
}
else {
printf(" LPT2 not installed.\n");
}

if (lpt3){
printf("LPT3 Address: 0x%X\n",lpt3);
}
else {
printf(" LPT3 not installed.\n");
}
printf("Timeout constants are hardcoded\n");
}
int main() {
checkparallelports();
return 0;
}