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- Modified_Frequency_Modulation abstract "Modified Frequency Modulation, commonly MFM, is a run-length limited (RLL) coding scheme used to encode the actual data-bits on most floppy disks. It was first introduced in disk drives with the IBM 3330 hard disk drive in 1970. Floppy disk drive hardware examples include Amiga, most CP/M machines as well as IBM PC compatibles. MFM is a modification to the original FM (frequency modulation) scheme for encoding data on single-density floppy disks and some early hard disk drives. Due to the minimum spacing between flux transitions that is a property of the disk and head design, MFM, which guarantees at most one flux transition per data bit, can be written at higher density than FM, which can require two transitions per data bit. It is used with a data rate of 250 – 500 kbit/s (500 – 1000 kbit/s encoded) on industry standard 5¼" and 3½" ordinary and high density diskettes. MFM was also used in early hard disk designs, before the advent of more efficient types of run-length limited coding. Except for the steadily disappearing 880 kiB and 1.4 MiB floppy disk formats, MFM encoding is obsolete in magnetic recording.".
- Modified_Frequency_Modulation wikiPageID "383902".
- Modified_Frequency_Modulation wikiPageRevisionID "606282424".
- Modified_Frequency_Modulation hasPhotoCollection Modified_Frequency_Modulation.
- Modified_Frequency_Modulation subject Category:Line_codes.
- Modified_Frequency_Modulation subject Category:Rotating_disc_computer_storage_media.
- Modified_Frequency_Modulation type Artifact100021939.
- Modified_Frequency_Modulation type Instrumentality103575240.
- Modified_Frequency_Modulation type Medium106254669.
- Modified_Frequency_Modulation type Object100002684.
- Modified_Frequency_Modulation type PhysicalEntity100001930.
- Modified_Frequency_Modulation type RotatingDiscComputerStorageMedia.
- Modified_Frequency_Modulation type StorageMedium106263762.
- Modified_Frequency_Modulation type Whole100003553.
- Modified_Frequency_Modulation comment "Modified Frequency Modulation, commonly MFM, is a run-length limited (RLL) coding scheme used to encode the actual data-bits on most floppy disks. It was first introduced in disk drives with the IBM 3330 hard disk drive in 1970. Floppy disk drive hardware examples include Amiga, most CP/M machines as well as IBM PC compatibles. MFM is a modification to the original FM (frequency modulation) scheme for encoding data on single-density floppy disks and some early hard disk drives.".
- Modified_Frequency_Modulation label "MFM-кодирование".
- Modified_Frequency_Modulation label "Modified Frequency Modulation".
- Modified_Frequency_Modulation label "Modified Frequency Modulation".
- Modified_Frequency_Modulation label "Modified Frequency Modulation".
- Modified_Frequency_Modulation label "Modified Frequency Modulation".
- Modified_Frequency_Modulation label "Modified Frequency Modulation".
- Modified_Frequency_Modulation label "Modified Frequency Modulation".
- Modified_Frequency_Modulation label "Zmodyfikowana modulacja częstotliwości".
- Modified_Frequency_Modulation sameAs Modified_Frequency_Modulation.
- Modified_Frequency_Modulation sameAs Modified_Frequency_Modulation.
- Modified_Frequency_Modulation sameAs Modified_Frequency_Modulation.
- Modified_Frequency_Modulation sameAs Modified_Frequency_Modulation.
- Modified_Frequency_Modulation sameAs Zmodyfikowana_modulacja_częstotliwości.
- Modified_Frequency_Modulation sameAs Modified_Frequency_Modulation.
- Modified_Frequency_Modulation sameAs m.021yx1.
- Modified_Frequency_Modulation sameAs Q1942166.
- Modified_Frequency_Modulation sameAs Q1942166.
- Modified_Frequency_Modulation sameAs Modified_Frequency_Modulation.
- Modified_Frequency_Modulation wasDerivedFrom Modified_Frequency_Modulation?oldid=606282424.
- Modified_Frequency_Modulation isPrimaryTopicOf Modified_Frequency_Modulation.