ISO-7487-3-1986.pdf
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1、 - - _ _ - _ _ ISO 7487 PT*3 Bb = 4853903 0305823 8 W INTERNATIONAL STANDARD IS0 7487-3 : 1986 TECHNICAL CORRIGENDUM 1 - - Published 1991-05-01 - - - - UDC 681.327.63 Ref. No. ISO7487-3 : 1986/Cor.l : 1991 (E) Descriptors : data processing, information interchange, magnetic disks, flexible disks, tr
2、ack formats, layout, specifications, quality. O ISO/IEC 1991 I Printed in Switzerland INTERNATIONAL ORGANIZATION FOR STANDARDIZATION. MEXAYHAPOAHAR OPrAHM3AUMR no CTAHAAPTMSAUMM - ORGANISATION INTERNATIONALE DE NORMALISATION INTERNATIONAL ELECTROTECHNICAL COMMISSION * MEXAYHAPOAHAR 3flEKTPOTEXHMc(EC
3、KAR KOMMCCMR * COMMISSION ELECTROTECHNIQUE INTERNATIONALE Information processing - Data interchange on 130 mm (5.25 in) flexible disk cartridges using modified frequency modulation recording at 7 958 ftprad, 1,9 tpmm (48 tpi), on both sides - Part 3: Track format B TECHNICAL CORRIGENDUM 1 Traitement
4、 de Iinformation - change de donnes sur cartouches disquette de 130 mm (5,25 in) utilisant un enregistrement modulation de frquence modifie 7 958 ftprad, 1,9 tpmm (48 tpi), sur les deux faces - Partie 3: Schma de piste B RECTIFICA TIF TECHNIQUE 1 Technical corrigendum 1 to International Standard IS0
5、 7487-3 : 1986 was prepared by ISO/IEC JTC 1, Information technology. Page i Contents Delete clause 5 and subclauses 5.1 and 5.2. Page 1 Clause 3 Delete references IS0 646, IS0 2022 and IS0 4873. Delete superscript 1) to reference IS0 9293. Delete footnote at bottom of page. I Copyright Internationa
6、l Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 01:38:15 MDTNo reproduction or networking permitted without license from IHS -,-,- _ _-_ -_ IS0 7487 PT*3 86 4853903 O305822 T IS0 7487-3 : 19/Cor.l : 1991 (E) Page 4 Su
7、bclause 4.2.2.2.4 Line 4, delete “of the sector address.“ and insert “of the address identifier.“ Clause 5 Delete the entire text and figure 3. Pages 5 and 7 Figures 4 and 5 Renumber figures as figures 3 and 4 and change references in text accordingly. 2 Copyright International Organization for Stan
8、dardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 01:38:15 MDTNo reproduction or networking permitted without license from IHS -,-,- F- sq- 3s- 7487 PT 3-86 485Lqo3 0055747 r - International Standard 748713 INTERNATIONAL ORGANIZATION FOR STAN
9、OAROIZATIONMEXYHAPOAHAR OPTAHM3AUMR no CTAHAAPTM3AUMMWRGANISATION INTERNATIONALE OE NORMALISATION Information processing - Data interchange on 130 mm (5.25 in) flexible disk cartridges using modified frequency modulation recording at 7 958 ftprad, 1,9 tpmm (48 tpi), on both sides - Part 3 : Track fo
10、rmat B Traitement de Iinformation - change de donnes sur cartouches a disquette de 130 mm (5.25 in) utilisant un enregistrement 2 modulation de frquence modifie 7 958 ftprad, 1,9 tpmm (48 tpi), sur les deux faces - Partie 3 : Schma de piste B Second edition - 1986-11-15 Ref. No. IS0 7487/3-1986 (E)
11、UI - UDC.1.327.63 w I -_ - Descriptors : data processing, information interchange, magnetic disks, flexible disks, track formats, layout, specifications, quality. . O 5 ! ? a t Price based on 8 pages Copyright International Organization for Standardization Provided by IHS under license with ISO Lice
12、nsee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 01:38:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Foreword IS0 (the International Organization for Standardization) is a worldwide federation of national standards bodies (IS0 member bodies). The work of preparing
13、International Standards is normally carried out through IS0 technical committees. Each member body interested in a subject for which a technical committee has been established has the right to be represented on that committee. International organizations, govern- mental and non-governmental, in liai
14、son with EO, also take part in the work. Draft International Standards adopted by the technical committees are circulated to the member bodies for approval before their acceptance as International Standards by the IS0 Council. They are approved in accordance with IS0 procedures requiring at least 75
15、 % approval by the member bodies voting. International Standard IS0 7487/3 was prepared by Technical Committee ISO/TC 97, information processing systems. This second edition cancels and replaces the first edition (IS0 7487/3-19841, of which it constitutes a minor revision. Users should note that all
16、 International Standards undergo revision from time to time and that any reference made herein to any other International Standard implies its latest edition, unless otherwise stated. O international Organization for Standardization, 1986 0 Printed in Switzerland ii , Id Copyright International Orga
17、nization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 01:38:15 MDTNo reproduction or networking permitted without license from IHS -,-,- Contents Page O Introduction 1 1 Scope and field of application . 1 2 Conformance . 1 3 Refe
18、rences . 1 4 Trackformat 1 4.1 General requirements . 1 Track layout after the first formatting for all tracks . 4.2 3 5 Coded representation of data . 4 5.1 Standards . 4 5.2 Codingmethods . 4 Annexes A EDC implementation 5 B Procedure and equipment for measuring flux transition spacing 6 C Data se
19、parators for decoding MFM recording . 8 . III Copyright International Organization for Standardization Provided by IHS under license with ISO Licensee=Aramco HQ/9980755100 Not for Resale, 04/23/2007 01:38:15 MDTNo reproduction or networking permitted without license from IHS -,-,- t INTERNATIONAL ST
20、ANDARD IS0 7487/3-1986 (E) i Information processing - Data interchange on 130 mm (5.25 in) flexible disk cartridges using modified frequency modulation recording at 7 958 ftprad, 1,9 tpmm (48 tpi), on both sides - Part 3 : Track format B O Introduction IS0 7487 specifies the characteristics of 130 m
21、m (5.25 in) flexible disk cartridges recorded at 7 958 ftprad, on 40 tracks on each side, using modified frequency modulation (MFM) recording. IS0 7487/1 specifies the dimensional, physical, and magnetic characteristics of the cartridge so as to provide physical interchangeability between data proce
22、ssing systems. IS0 748711 and IS0 748713, together with the labelling scheme specified in IS0 9293, provide for full data interchange between data processing systems. IS0 7487/2 specifies an alternative track format for data interchange. 1 This part of IS0 7487 specifies the quality of recorded sign
23、als, the track layout, and a track format to be used on 130 mm (5.25 in) flexible disk cartridges intended for data interchange between data processing systems. Scope and field of application NOTE - Numeric values in the SI and/or Imperial measurement system in this International Standard may have b
24、een rounded off and therefore are consistent with, but not exactly equal to, each other. Either system may be used, but the two should be neither intermixed nor re-converted. The original design of this part of IS0 7487 was made using SI units. 2 Conformance A flexible disk cartridge shall be in con
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