#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#define DATA_PORT 0x378 /* parallel port base address */
#define STATUS_PORT DATA_PORT + 1
#define CONTROL_PORT DATA_PORT + 2
unsigned char status, data;
// Array to hold bit patterns for each digit
unsigned char digit_patterns[10] = {
0b00111111, // digit 0
0b00000110, // digit 1
0b01011011, // digit 2
0b01001111, // digit 3
0b01100110, // digit 4
0b01101101, // digit 5
0b01111101, // digit 6
0b00000111, // digit 7
0b01111111, // digit 8
0b01101111 // digit 9
};
int main()
{
if (ioperm(DATA_PORT, 1, 1))
{
fprintf(stderr, "Access denied to %x\n", DATA_PORT);
exit(1);
}
while (1)
{
for (int digit = 0; digit < 10; digit++)
{
data = digit_patterns[digit]; // Get bit pattern for current digit
outb(~data, DATA_PORT); // Display the digit
sleep(1); // Delay for 1 second
}
}
ioperm(DATA_PORT, 1, 0); // release the port
return 0;
}
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