protected static void calculateChecksum(Patch p, int start, int end, int ofs) {
protected void calculateChecksum(Patch p, int start, int end, int ofs) {
    protected static void calculateChecksum(Patch p, int start, int end, int ofs) {        int sum = 0;        for (int i = start; i <= end; i++)            sum += p.sysex[i];        sum += 0xA5;        p.sysex[ofs] = (byte) (sum % 128);    }