Programmed disk controller capable of operating with a variety o

Details Programmed disk controller capable of operating with a variety o Programmed disk controller capable of operating with a variety o

1984-06-28

1987-03-17

Shaw, Gareth D.

Dynamic magnetic information storage or retrieval

General processing of a digital signal

Data in specific format

G11D 509

Patent

active

046512373

ABSTRACT:
A disk controller system utilizes a single state machine having random access memory which is loaded with program code to translate between computer data and signals obtained by reading from, or developed for writing onto, a magnetic disk in accordance with a selected data encoding technique. The encoding techniques that are discussed include FM, MFM, GCR and RLL. Different program code is loaded into the state machine's memory to make the controller operate with each of these techniques.

REFERENCES:
patent: 4017838 (1977-04-01), Breyer
patent: 4151571 (1979-04-01), Cardot
patent: 4210959 (1980-07-01), Wozniak
patent: 4357707 (1982-11-01), Delury
patent: 4433377 (1984-02-01), Eustis et al.
patent: 4544962 (1985-10-01), Kato et al.
patent: 4584616 (1986-04-01), Allen
Universal Floppy Disk Controller, (UFDC) Nov. 1983, Zilof.
Floppy Disk Drive Technology: Ingenious Data Encoding Fills Floppy Disks Twice as Full, Electronics, Apr. 7, 1983.

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