protected static void calculateChecksum(Patch p, int start, int end,
protected void calculateChecksum(Patch p, int start, int end,
  protected static void calculateChecksum(Patch p, int start, int end,            int ofs) {        int i;        int sum = 0;        for (i = start; i <= end; i++)            sum += p.sysex[i];        p.sysex[ofs] = (byte) (sum % 128);    }