0-6 mfm: halfbit: "0"
6-15 mfm: halfbit: "1"
15-21 mfm: halfbit: "0"
21-27 mfm: halfbit: "1"
27-33 mfm: halfbit: "0"
33-39 mfm: halfbit: "1"
39-45 mfm: halfbit: "0"
45-51 mfm: halfbit: "0"
51-57 mfm: halfbit: "1"
57-63 mfm: halfbit: "0"
63-69 mfm: halfbit: "0"
69-75 mfm: halfbit: "1"
75-81 mfm: halfbit: "0"
81-87 mfm: halfbit: "0"
87-93 mfm: halfbit: "0"
93-99 mfm: halfbit: "1"