Mfm Encoding

Some articles on encoding, mfm encodings:

Modified Frequency Modulation - Coding
... As is standard when discussing hard drive encoding schemes, FM and MFM encodings produce a bit stream which is NRZI encoded when written to disk ... Data encoding has to balance two factors there are limits on the minimum and maximum number of 0 bits that the hardware can detect between consecutive 1 bits ... and fewer sectors will fit each track Both FM and MFM encodings can also be thought of as having data bits separated by clock bits, but with different rules for encoding the bits ...