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RISC OS 3.7 User Guide
File types are three-digit hexadecimal numbers. They are divided into ranges.
For each type, there may be a default action on loading and running the file. These actions may change, depending on whether the desktop is in use, and which applications have been seen. The system variables Alias$@LoadType_XXX and Alias$@RunType_XXX give the actions (XXX = file type).
Some types have a textual equivalent set at start-up, which may be used in most commands (but not in the above system variables) instead of the hexadecimal code. These are indicated in the table below by a 'T'. For example, file type &FFF is set at start-up to have the textual equivalent
Text. Other textual equivalents may be set as an application starts - for example, Acorn Desktop Publisher sets up file type &AF9 to be
DtpDoc, and file type &AFA to be
DtpStyle. These textual equivalents are set using the system variables File$Type_XXX, where XXX is the file type.
You should use the hexadecimal file type in command scripts and in programs, otherwise you will find that your files will give an error if you try to run them on a machine that uses a territory with different textual equivalents.
The following types are currently used or reserved by Acorn. Not all file types used by software houses are shown. This list may be extended from time to time:
File type Description Textual equivalent FFF Plain ASCII text Text T FFE Command (Exec) file Command T FFD Data Data T FFC Position independent code Utility T FFB Tokenised BASIC program BASIC T FFA Relocatable module Module T FF9 Sprite or saved screen Sprite T FF8 Absolute application loaded at &8000 Absolute T FF7 BBC font file (sequence of VDU operations) BBC font T FF6 Font Font T FF5 PostScript PoScript T FF4 Dot Matrix data file Printout T FF3 LaserJet data file LaserJet ; FF2 Configuration (CMOS RAM) Config T FF1 Raw unprocessed data (e.g. terminal streams) RawData FF0 Tagged Image File Format TIFF FED Palette data Palette T FEC Template file Template T FEB Obey file Obey T FEA Desktop Desktop T FE9 ViewWord ViewWord FE8 ViewPS ViewPS FE7 ViewSheet ViewSht FE6 UNIX executable UNIX Ex FE4 DOS file DOS T FE3 Atari file Atari FE2 Commodore Amiga file Amiga FE1 Make data Make FDF TCP/IP suite VT220 script VTScript FDE TCP/IP suite VT220 setup VTSetup FDD Master utilities MasterUtl FDC TCP/IP suite unresolvable UNIX soft link SoftLink FDB Text using CR and LF for line ends TextCRLF FDA PC Emulator DOS batch file MSDOSbat FD9 PC Emulator DOS executable file MSDOSexe FD8 PC Emulator DOS command file MSDOScom FD7 Obey file in a task window TaskObey T FD6 Exec file in a task window TaskExec T FD5 DOS Pict Pict FD4 International MIDI Assoc. MIDIfiles standard MIDI FD3 Acorn DDE debuggable image DebImage FD1 BASIC stored as text BASICTxt FD0 PC Emulator configuration PCEmConf FCF Font cache Cache T FCE FileCore floppy disc image FileCoreFloppyDisc FCD FileCore hard disc image FileCoreHardDisc FCC Device object within DeviceFS Device T FCA Single compressed file Squash FC9 Sun raster file SunRastr FC8 DOS MultiFS disc image DOSDisc T
Industry standard file types
File type Description Textual equivalent DFE Comma separated values CSV DEA Data exchange format (AutoCAD etc) DXF DB4 SuperCalc III file SuperCalc DB3 DBase III file DBaseIII DB2 DBase II DBaseII DB1 DBase index file DBaseIndex DB0 Lotus 123 file WK1 (was Lotus123) CE5 TEX file TeX CAF IGES graphics IGES CAE Hewlett-Packard graphics language HPGLPlot C85 JPEG (Joint Photographic Experts Group) file JPEG
Acorn Advance file types
File type Description Textual equivalent C25 Acorn Advance Wordprocessor AWord C26 Acorn Advance Spreadsheet ASheet C27 Acorn Advance Database ADBase C28 Acorn Advance Graph AGraph
BBC ROM file type
File type Description Textual equivalent BBC BBC ROM file (ROMFS) BBC ROM T
Acornsoft file types
File type Description Textual equivalent AFF Draw file DrawFile T AFE Mouse event record Mouse AFA DTP style file DtpStyle AF9 DTP documents DtpDoc AF8 First Word Plus file 1stWord+ AF7 Help file HelpInfo AF1 Maestro file Music AF0 ArcWriter file ARCWriter AE9 Alarm file Alarms ADB Outline font (obsolete file type) New Font
RISC OS 3.7 User Guide - 20 JAN 1997
Last Edit: Tue,03 Nov 2015