isoiec9293

INTERNATIONALSTANDARDISO/IEC9293Secondedition1994-1l-l5Informationtechnology-VolumeandfilestructureofdiskcartridgesforinformationinterchangeTechnologiesdeI’information-VolumeetstructuredesfichiersdescartouchesadisquettepourI’khanged’informationReferencenumberISO/1EC9293:1994(E)ISO/IEC9293:1994(E)ContentsPageSection1-Genera111Scope2Conformance2.1ConformanceofanFDC2.2ConformanceofaninformationprocessingSystem3Normativereferences4Definitions4.1byte4.2datafieldofasector4.3datainterchangeStandard4.4defectivesector4.5descriptor4.6FDC4.7file4.8formatting4.9implementation4.10initiahzation4.11ODC4.12originatingSystem4.13receivingSystem4.14sector4.15physicaltrack4.16user4.17fixed-lengthrecord4.18record4.19Segment4.20segmentedrecord4.21variable-lengthrecord1111233333333333333333444440ISO/IEC1994Allrightsreserved.Nopartofthispublicationmaybereproducedorutilizedinanyformorbyanymeans,electronieormechanical,includingphotocopyingandmicrofilm,withoutper-missioninwritingfromthepublisherISO/IECCopyrightOffice*CasePostale56*CH-1211Geneve20*SwitzerlandPrintedinSwitzerland0ISO/IECISO/IEC9293:1994(E)5Notations45.1Decimalandhexadecimalnotations5.2Othernotations5.3Capitalletters444Section2-Requirementsforthemedium56Volumestructure56.1ArrangementofdataonanFD@56.1.1FDCParameters6.1.2PhysicalAddresses6.1.3LogicalSeetorNumber6.1.4SystemAreaandDataArea6.1.5ParametersoftheVolumeStructure6.2ArrangementoftheDataArea66.2.1Clusters66.2.2Statusofclusters66.3ArrangementoftheSystemArea76.3.1FDCDescriptorandspaceforSystemuse6.3.2FileAllocationTable(FAT)6.3.3RootDirectory6.3.4SizeoftheSystemArea6.4Files86.4.1FileSpate86.4.2Relationtoclusters86.4.3Filelength86.5Sub-directories87Contentofafile98Recordingofdescriptorfields98.1Numeritalvaluesinone-bytefields98.2Numeritalvaluesintwo-bytefields98.3Numeritalvaluesinfour-bytefields98.4Pairsof12-bitintegers98.5Charactersetandcoding98.6Justificationofcharacters109FDCDescriptor109.1FDCDescriptorandExtendedFDCDescriptorlayout109.2FDCDescriptorandExtendedFDCDescriptorFelds119.2.1FieldreservedforSystemuse(BP1to3)119.2.2CreatingSystemIdentifier(BP4to11)119.2.3SeetorSize(BP12and13)119.2.4SeetorsperCluster(BP14)119.2.5ReservedSeetorCount(BP15and16)12...111ISO/IEC9293:1994(E)0ISO/IEC9.2.6NumberofFATs(BP-17)9.2.7RootDirectoryEntries(BP18and19)9.2.8TotalSeetors(BP20and21)9.2.9MediumIdentifier(BP22)9.2.10SeetorsperFAT(BP23and24)9.2.11SeetorsperTrack(BP25and26)9.2.12NumberofSides(BP27and28)9.2.13Fieldreservedforfuturestandardization(FDCDescriptorBP29and30)9.2.14FieldreservedforSystemuse(ExtendedFDCDescriptorBP29to32)9.2.15TotalSeetors(ExtendedFDCDescriptor;BP33to36)9.2.16FieldreservedforSystemuse(ExtendedFDCDescriptorBP37)9.2.17Fieldreservedforfuturestandardization(ExtendedFDCDescriptorBP38)9.2.18ExtendedBootRecordSignature(ExtendedFDCDescriptorBP39)9.2.19VolumeIDNumber(ExtendedFDCDescriptorBP40to43)9.2.20VolumeLabel(ExtendedFDCDescriptorBP44to54)9.2.21FileSystemType(ExtendedFDCDescriptorBP55to62)9.2.22FieldreservedforSystemuse(FDCDescriptorBP31to512;ExtendedFDCDescriptorBP63to512)10FileAllocationTable10.1FormatIdentifier10.2FATentries10.2.1FATentrysize10.2.2NumberofFATentries10.2.3FATentryvalues10.2.4MaximumClusterNumber(W@10.3NumberofsectorsineachFAT10.4RecordedformoftheFAT11Filedirectories11.1Characteristics1511.2Directoryentrytypes1511.3GeneraldefinitionofDirectoryEntryfields1611.3.1Name(BP1to8)1611.3.2NameExtension(BP9to11)1611.3.3Attributes(BP12)1611.3.4ReservedField(BP13to22)1711.3.5TimeRecorded(BP23and24)1711.3.6DateRecorded(BP25and26)1711.3.7StartingClusterNumber(BP27and28)1711.3.8FileLength(BP29to32)1711.4FileEntry11.4.1Name(BP1to8)1711.4.2NameExtension(BP9to11)1711.4.3Attributes(BP12)1711.4.4ReservedField(BP13to22)1811.4.5TimeRecorded(BP23and24)1811.4.6DateRecorded(BP25and26)1811.4.7StartingClusterNumber(BP27and28)1811.4.8FileLength(BP29to32)181212121212121212121213131313131313131414141414141515151711.5VolumeLabelEntry180ISO/IECISO/IEC9293:1994(E)11.5.1NameandNameExtension(BP1to11)1811.5.2Attributes(BP12)1811.5.3ReservedField(BP13to22)1811.5.4TimeRecorded(BP23and24)1811.5.5DateRecorded(BP25and26)1811.5.6StartingClusterNumber(BP27and28)1811.5.7FileLength(BP29to32)1811.6Sub-directoryPointerEntry1811.6.1Name(BP1to8)11.6.2NameExtension(BP9to11)11.6.3Attributes(BP12)11.6.4ReservedField(BP13to22)11.6.5TimeRecorded(BP23and24)11.6.6DateRecorded(BP25and26)11.6.7StartingClusterNumber(BP27and28)11.6.8FileLength(BP29to32)191919191919191911.7Sub-directoryIdentifierEntry1911.7.1Name(BP1to8)1911.7.2NameExtension(BP9to11)1911.7.3Attributes(BP12)1911.7.4ReservedField(BP13to22)1911.7.5TimeRecorded(BP23and24)2011.7.6DateRecorded(BP25and26)2011.7.7StartingClusterNumber(BP27and28)2011.7.8FileLength(BP29to32)2011.8Sub-directoryParentPointerEntry2011.8.1Name(BP1to8)2011.8.2NameExtension(BP9to11)2011.8.3Attributes(BP12)2011.8.4ReservedField(BP13to22)2011.8.5TimeRecorded(BP23and24)2011.8.6DateRecorded(BP25and26)2011.8.7StartingClusterNumber(BP27and28)2011.8.8FileLength(BP29to32)2111.9Not-currently-usedEntry2111.9.1NameField(BP1to8)