ECMA 99 : 1ED 85

SECTION I - GENERAL DESCRIPTION AND DEFINITIONS
SCOPE AND CONFORMANCE
1 GENERAL DESCRIPTION
  1.1 General Figures
  1.2 Main Elements
  1.3 Description
  1.4 Optional Features
  1.5 Definitions
SECTION II - MECHANICAL AND PHYSICAL CHARACTERISTICS
2 GENERAL REQUIREMENTS
  2.1 Environment and Transportation
  2.2 Materials
3 DIMENSIONAL CHARACTERISTICS
  3.1 Jacket
  3.2 Liner
  3.3 Disk
4 PHYSICAL CHARACTERISTICS
  4.1 Inflammability
  4.2 Coefficient of Linear Thermal Expansion of the disk
  4.3 Coefficient of Linear Hygroscopic Expansion of the Disk
  4.4 Opacity
  4.5 Torque
SECTION III - MAGNETIC CHARACTERISTICS OF THE UNRECORDED FLEXIBLE
              DISK CARTRIDGE
5 MAGNETIC CHARACTERISTICS
  5.1 Track Geometry
  5.2 Functional Testing
SECTION IV - TRACK FORMAT No. 1
6 TRACT FORMAT No.1
  6.1 General Requirements
  6.2 Description of Track Layout after First Formatting for
       Track 00, Side 0
  6.3 Track Layout after the first Formatting for all for all
       Tracks other than Track 00, Side 0
  6.4 Track Layout of a Recorded Flexible Disk Data Interchange

  6.4 Track Layout of a Recorded Flexible Disk Data Interchange
SECTION V - TRACK FORMAT No. 2
7 GENERAL REQUIREMENTS
  7.1 Mode of Recording
  7.2 Track Location Tolerance of the Recorded Flexible Disk
       Cartridge
  7.3 Recording Offset Angle
  7.4 Density of Recording
  7.5 Flux Transition Spacing
  7.6 Average Signal Amplitude
  7.7 Byte
  7.8 Sector
  7.9 Cylinder
  7.10 Cylinder Number
  7.11 Data Capacity of a Track
  7.12 Hexadecimal Notation
  7.13 Error Detection Characters (EDC)
8 TRACK LAYOUT
  8.1 Index Gap
  8.2 Sector Identifier
  8.3 Identifier Gap
  8.4 Data Block
  8.5 Data Block Gap
  8.6 Track Gap
9 CODED REPRESENTATION OF DATA
  9.1 Standards
  9.2 Coding Methods
APPENDIX A - MEASUREMENT OF THE CARTRIDGE THICKNESS
APPENDIX B - MEASUREMENT OF LIGHT TRANSMITTANCE
APPENDIX C - METHOD FOR MEASURING THE EFFECTIVE TRACK WIDTH
APPENDIX D - PROCEDURE AND EQUIPMENT FOR MEASURING FLUX
             TRANSITION SPACING
APPENDIX E - DATA SEPARATION FOR DECODING MFM RECORDING
APPENDIX F - EDC IMPLEMENTATION

Defines the mechanical, physical and magnetic characteristics of a 130 mm magnetic flexible disk cartridge with a track density of 3,8 tracks per mm, recorded on both sides at 13 262 flux transitions per radian to provide physical interchangeability between data processing systems.