byte bitmap[] = dsched.readBlock(1);
        for (int i = 0; i!=16382; i++) {
            float bits = (BM.read_ubits(bitmap, i, i+2));
            if (bits == 00) unused++;
            else if (bits == 01) reserved++;
            else if (bits == 10) used++;
            else if (bits == 11) invalid++;
        }