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

#include "common.h"

int i,b;
FILE *f;

unsigned char cart[PAYLOADBANKS * 0x2000];
unsigned char rnd[0x2000];
unsigned char testcode[0x2000];

int main(int argc, char *argv[])
{
    // 8k of random data
    f = fopen("random.bin", "rb");
    for (i = 0; i < 0x2000; i++) {
        rnd[i] = fgetc(f);
    }
    fclose(f);

    // 8k of ROM testcode
    f = fopen("testcode.bin", "rb");
    for (i = 0; i < 0x2000; i++) {
        testcode[i] = fgetc(f);
    }
    fclose(f);

    // 24k cartridge data
    f = fopen("testcart.bin", "rb");
    for (i = 0; i < (PAYLOADBANKS * 0x2000); i++) {
        cart[i] = fgetc(f);
    }
    fclose(f);

    // actual cart data first
    f = fopen("mergedcart.bin", "wb");
    for (i = 0; i <  (PAYLOADBANKS * 0x2000); i++) {
        fputc(cart[i], f);
    }
    // testcode
    for (i = 0; i < 0x2000; i++) {
        fputc(testcode[i], f);
    }

    // fill rest of cart with random data
    // even bytes are EORed with bank nr. highbyte
    // odd bytes are EORed with bank nr. lowbyte
    for (b = (PAYLOADBANKS + 1); b < CARTBANKS; b++) {
        for (i = 0; i < 0x2000; i++) {
            fputc(rnd[i] ^ (b >> 8), f);
            i++;
            fputc(rnd[i] ^ (b & 0xff), f);
        }
    }
    fclose(f);
}