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BS 6542-1:1984

Current
Current

The latest, up-to-date edition.

File structure and labelling of flexible disk cartridges for information interchange Specification for sequential file allocation structure
Available format(s)

Hardcopy , PDF

Language(s)

English

Published date

10-31-1984

Publisher

British Standards Institution

Requirements for the interchange of information between users of different information processing systems.

This International Standard specifies requirements for the file structure and the labelling of flexible disk cartridges for the interchange of information between users of different information processing systems.

This International Standard specifies

  1. recorded labels to identify files, file sections, and volumes of flexible disk cartridges;
  2. basic characteristics of the blocks containing the records constituting the file;
  3. the file structure.

This International Standard specifies three nested levels of interchange so that

  1. at the first level, called BASIC INTERCHANGE (BI), it is possible to interchange data by using a minimum set of the facilities provided;
  2. at the second level, called EXTENDED INTERCHANGE LEVEL 1 (E1), it is possible to interchange data using the minimum set together with blocks having a length greater than that of the physical records and with blocked fixed-length records;
  3. at the third level, called EXTENDED INTERCHANGE LEVEL 2 (E2), it is possible to interchange data using the facilities of levels BI and E1 together with variable-length records and segmented records.

Annex A describes examples but does not form part of this standard.

Annex B gives disk parameter values derived from flexible disk data interchange standards, but does not form part of this standard.

Committee
ICT/1
DevelopmentNote
Also numbered as ISO 7665 Supersedes 82/63296 DC (09/2005)
DocumentType
Standard
Pages
30
PublisherName
British Standards Institution
Status
Current

BS 6957-1(1988) : AMD 7322 GUIDE TO CONSTRUCTION & USE OF 130MM(5.25IN) FLEXIBLE DISK CARTRIDGES FOR DATA INTERCHANGE, USING MODIFIED FREQUENCY MODULATION RECORDING AT 13262 ftprad, ON 80 TRACKS ON EACH SIDE - DIMENSIONAL, PHYSICAL AND MAGNETIC CHARACTERISTICS
BS 6957-2(1988) : AMD 7323
BS 6542-2:1988 File structure and labelling of flexible disk cartridges for information interchange Specification for variable file allocation structure

BS 4730:1974 Specification for the United Kingdom 7-bit data code (ISO-7-UK)
ISO 5654-1:1984 Information processing Data interchange on 200 mm (8 in) flexible disk cartridges using two-frequency recording at 13 262 ftprad, 1,9 tpmm (48 tpi), on one side Part 1: Dimensional, physical and magnetic characteristics
BS 6006:1980 Specification for United Kingdom 8-bit data code
ISO 5654-2:1985 Information processing Data interchange on 200 mm (8 in) flexible disk cartridges using two- frequency recording at 13 262 ftprad, 1.9 tpmm (48 tpi), on one side Part 2: Track format
ISO/IEC 2022:1994 Information technology Character code structure and extension techniques
BS 6542-2:1988 File structure and labelling of flexible disk cartridges for information interchange Specification for variable file allocation structure
ISO/IEC 7487-1:1993 Information technology 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 ISO type 202 Part 1: Dimensional, physical and magnetic characteristics
ISO 7065-1:1985 Information processing Data interchange on 200 mm (8 in) flexible disk cartridges using modified frequency modulation recording at 13 262 ftprad, 1,9 tpmm (48 tpi), on both sides Part 1: Dimensional, physical and magnetic characteristics
ISO/IEC 646:1991 Information technology ISO 7-bit coded character set for information interchange
ECMA 78 : 1986 DATA INTERCHANGE ON 130 MM FLEXIBLE DISK CARTRIDGES USING MFM RECORDING AT 7958 FTPRAD ON 80 TRACKS ON EACH SIDE
ISO 7065-2:1985 Information processing Data interchange on 200 mm (8 in) flexible disk cartridges using modified frequency modulation recording at 13 262 ftprad, 1,9 tpmm (48 tpi), on both sides Part 2: Track format
ISO 7487-2:1985 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 2: Track format A
ECMA 59 : 1979 DATA INTERCHANGE ON 200 MM FLEXIBLE DISK CARTRIDGES USING TWO-FREQUENCY RECORDING AT 13262 FTPRAD ON BOTH SIDES

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