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

void main(int argc, char** argv)
{
    if (argc != 2)
    {
        printf("No input file specified\n");
        return;
    }

    FILE* ccFile = fopen(argv[1], "r+b");
    if (ccFile == NULL)
    {
        printf("Unable to open file\n");
        return;
    }

    if (fseek(ccFile, 0x7a, SEEK_SET) != 0)
    {
        fclose(ccFile);
        printf("Unable to seek to position\n");
        return;
    }

    uint8_t b1 = fgetc(ccFile);
    uint8_t b2 = fgetc(ccFile);

    if (b1 != 0x00 || b2 != 0x27)
    {
        fclose(ccFile);
        printf("Unexpected data\n");
        return;
    }

    fseek(ccFile, 0x7a, SEEK_SET);
    fputc(0x80, ccFile);
    fputc(0x13, ccFile);

    fclose(ccFile);

    printf("Done!\n");
}