public void calculateChecksum(Patch p, int start, int end, int ofs) {
protected void calculateChecksum(Patch p, int start, int end, int ofs) {
    public 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);    }