Editing Group coded recording (section)

== Further reading ==
* [[ANSI]] [[INCITS]] 40-1993 (R2003) Unrecorded Magnetic Tape for Information Interchange (9-track, 800&nbsp;bpi, [[NRZI]]; {{val|1600|u=bpi}}, [[Phase Encoding|PE]]; and {{val|6250|u=bpi}}, GCR)
* ANSI INCITS 54-1986 (R2002) Recorded Magnetic Tape for Information Interchange ({{val|6250|u=bpi}}, GCR)
* {{cite journal |journal=[[IEEE Spectrum]] |title=Magnetic tape: A high performer: Magnetic tape has evolved into a highly effective medium for high-density and low-cost-per-bit data recording |author-first=Herbert W. |author-last=Sallet |volume=14 |issue=7 |date=July 1977 |pages=26–31 |doi=10.1109/MSPEC.1977.6501525}}
* {{cite journal |journal=Computer Design |title=Group-Coded Recording Reliably Doubles Diskette Capacity |author-first=Pawitter S. |author-last=Sidhu |date=December 1976 |pages=84–88}}
* {{cite journal |title=(unknown) |publisher=[[Perkin-Elmer Data Systems]] |journal=Perkin-Elmer Data Systems News |date=1977-06-14}}<!-- info on GCR -->
* {{cite journal |author-first1=(Ben) M. Y. |author-last1=Hsiao |author-first2=William C. |author-last2=Carter |author-first3=James W. |author-last3=Thomas |author-first4=William R. |author-last4=Stringfellow |title=Reliability, Availability, and Serviceability of IBM Computer Systems |journal=[[IBM Journal of Research and Development]] |volume=25 |issue=5 |doi=10.1147/rd.255.0453 |pages=462 |date=September 1981}} (NB. Mentions the 5/4 RLL code used on {{val|6250|u=bpi}} tape drives.)
* {{cite book|title=Qualstar 34XX Technical Service Manual |publisher=[[Qualstar Corporation]] |location=Canoga Park, CA, USA |id=500450 |edition=Revision J |pages=3-4..3-7 |url=http://www.qualstar.com/500450.pdf |access-date=2017-03-23 |url-status=dead |archive-url=https://web.archive.org/web/20110930233939/http://www.qualstar.com/500450.pdf |archive-date=2011-09-30}} (NB. Additional detail on the GCR tape format.)
* {{cite patent |title=Block encoding for magnetic recording systems |country=US |number=3685033 |pubdate=1972-08-15 |fdate=1970-08-24 |pridate=1970-08-24 |inventor1-first=Ashok K. |inventor1-last=Agrawala |inventor2-first=Keshava |inventor2-last=Srivastava |assign1=[[Honeywell Inc.]]}} (NB. Application No: US {{val|66199}}. See also: CA993998A, CA993998A1, DE2142428A1)
* {{cite patent |title=Controller for magnetic disc, recorder, or the like |country=US |number=4210959 |pubdate=1980-07-01 |fdate=1978-05-10 |pridate=1978-05-10 |inventor-first=Stephen G. |inventor-last=Wozniak |inventor-link=Stephen G. Wozniak |assign1=[[Apple Computer, Inc.]]}} (NB. Application Number: US 5/904420)
* {{cite patent |title=Error detection system |country=US |number=4564941 |pubdate=1986-01-14 |fdate=1983-12-08 |pridate=1983-12-08 |inventor1-first=Richard N. |inventor1-last=Woolley |inventor2-first=Neal |inventor2-last=Glover |inventor3-first=Richard |inventor3-last=Williams |assign1=[[Apple Computer, Inc.]]}} (NB. Application Number: US 06/559210. See also: CA1208794A, CA1208794A1, DE3443272A1, DE3443272C2)
* {{cite web |author-first=Sean Brendan |author-last=Dockery |archive-url=https://web.archive.org/web/20160105012904/ftp://ftp.apple.asimov.net/pub/apple_II/documentation/misc/disk_encoding.doc.txt |archive-date=2016-01-05 |url-status=dead |title=Apple II disk encoding |url=ftp://ftp.apple.asimov.net/pub/apple_II/documentation/misc/disk_encoding.doc.txt}}
* {{cite book |title=NEC µPD72070 – Floppy Disk Controller Specification Version 2.0 |version=2.0 preliminary |publisher=[[NEC Corporation]] |date=October 1991 |url=http://dec8.info/Apple/uPD72070.pdf |access-date=2017-03-20 |url-status=dead |archive-url=https://web.archive.org/web/20170320235834/http://dec8.info/Apple/uPD72070.pdf |archive-date=20 March 2017 }}
* {{cite web |title=GCR decoding on the fly |author-first=Linus |author-last=Åkesson |date=2013-03-31 |url=https://www.linusakesson.net/programming/gcr-decoding/index.php |access-date=2017-03-21 |url-status=live |archive-url=https://web.archive.org/web/20170321014657/https://www.linusakesson.net/programming/gcr-decoding/index.php |archive-date=2017-03-21}}
* {{cite web |title=Commodore GCR "mysteries" |author-first=Spiro |author-last=Trikaliotis |date=2010-03-05 |url=http://blog.trikaliotis.net/2010/03/05/Commodore-GCR-mysteries |url-status=dead |archive-url=https://web.archive.org/web/20140805202755/http://blog.trikaliotis.net/2010/03/05/Commodore-GCR-mysteries |archive-date=2014-08-05}}
* {{cite web |title=GCR ROM en-/decoder in Commodore 8050 and 8250 disk drives |work=Forum 64 |url=http://www.forum64.de/wbb3/board13-sonstige-commodore/board16-cbm-rechner/34423-backup-einer-8250-diskette-funzt-nicht/index4.html#post408597 |url-status=live |archive-url=https://web.archive.org/web/20100312090430/http://www.forum64.de/wbb3/board13-sonstige-commodore/board16-cbm-rechner/34423-backup-einer-8250-diskette-funzt-nicht/index4.html#post408597 |archive-date=2010-03-12}}
* {{cite journal |title=The IBM 3803/3420 Magnetic Tape Subsystem |author-first1=John W. |author-last1=Irwin |author-first2=John V. |author-last2=Cassie |author-first3=Harlyn C. |author-last3=Oppeboen |date=September 1971 |orig-year=1970-12-11 |journal=[[IBM Journal of Research and Development]] |publisher=[[IBM]] |pages=391–400 |citeseerx=10.1.1.89.7834}}
* {{cite web |title=Milestone-Proposal:Introduction of the Apple Macintosh Computer, 1984 |author-last=Docket |date=June 2014 |url=http://ieeemilestones.ethw.org/Milestone-Proposal:Introduction_of_the_Apple_Macintosh_Computer,_1984 |access-date=2018-07-09 |url-status=live |archive-url=https://web.archive.org/web/20180709092346/http://ieeemilestones.ethw.org/Milestone-Proposal:Introduction_of_the_Apple_Macintosh_Computer,_1984 |archive-date=2018-07-09}}
* {{cite web |title=Crazy Disk Encoding Schemes |work=Big Mess O' Wires (BMOW) – Plus Too |date=2011-10-02 |url=http://www.bigmessowires.com/2011/10/02/crazy-disk-encoding-schemes/ |access-date=2018-07-09 |url-status=live |archive-url=https://web.archive.org/web/20180709092935/https://www.bigmessowires.com/2011/10/02/crazy-disk-encoding-schemes/ |archive-date=2018-07-09}}
* {{cite book |title=Handbuch der Tonstudiotechnik |language=de
|author-first1=Michael |author-last1=Dickreiter |author-first2=Volker |author-last2=Dittel |author-first3=Wolfgang |author-last3=Hoeg |author-first4=Martin |author-last4=Wöhr |publisher=[[Walter de Gruyter GmbH & Co KG]] |date=2014 |isbn=978-3-11-031650-6 |id={{ISBN|3-11031650-1}} |url=https://books.google.com/books?id=DqLoBQAAQBAJ&pg=PA835 |access-date=2018-07-09 }}
* {{cite book |title=Digital Baseband Transmission and Recording  |chapter=Chapter 4.8.3 Group-Coded Recording (GCR) Code |author-first=Jan W. M. |author-last=Bergmans |date=2013-03-09 |orig-year=1996 |publisher=[[Kluwer Academic Publishers]] / [[Springer Science+Business Media]] |location=[[Philips Research]], Eindhoven, Netherlands |edition=reprint |isbn=978-1-4419-5164-9 |doi=10.1007/978-1-4757-2471-4  |url=https://books.google.com/books?id=PB_aBwAAQBAJ&pg=PA179 |access-date=2018-07-09 }}
* {{cite book |title=Magnetic Recording Handbook |author-first=Marvin |author-last=Camras |date=2012 |orig-year=1988 |edition=reprint |lccn=86-24762 |doi=10.1007/978-94-010-9468-9 |isbn=978-9-40109468-9 |id={{ISBN|9-40109468-3}} |publisher=[[Van Nostrand Reinhold Company]] / [[Springer Science+Business Media]] |url=https://books.google.com/books?id=PdruCAAAQBAJ&pg=PA602 |access-date=2018-07-09 }}
* {{cite journal |title=In Single-Drive Setup – Tape System Has Three Densities |date=1979-05-07 |journal=[[Computerworld]] |volume=XIII |number=19 |publisher=[[CW Communications/Inc.]] |location=Louisville, Colorado, USA |page=59 |url=https://books.google.com/books?id=f8kLXVsJ3J8C&pg=RA1-PA59 |access-date=2018-07-09 }}