File Extensions as shown on

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(COMMAND file) If you want to run a program, you have to look for a file with this extension. The COM extension refers to a file which can always be run, is in machine code, and can be loaded from anywhere (EXDOS, BASIC, WP etc.) Warning! CP/M programs also use the COM file extension, but these can be loaded only in IS-DOS!


(BATCH-file) Batch command file. This is a standard text file containing executable EXDOS commands (or other commands which can be interpreted by other system extensions). These commands are executed by the system one by one, when you run the file.


Initialising (start-up) file (text file). A special variant of this is EXDOS.INI, which is run by EXDOS at each system restart.


BASIC file. A file containing a Basic program. It can be run by loading it into IS-BASIC. The Enterprise does not store BASIC programs as text but in a coded (tokenised) format.


A loader (runnable file) for a program compiled by Zzzip. The extension is somewhat misleading as it is actually a BASIC program, so it is to be loaded in IS-BASIC.


A program file (not runnable) compiled by Zzzip. It cannot be run directly, but instead by runnning a BASIC loader (with ZIP extension).


Pascal source code. The Pascal program has to be compiled before running so a file with PAS extension has to be compiled into a runnable file with COM extension. PAS files can be loaded into the Pascal editor.


ASMON / ASMEN source file. This is a text file in assembly language, which can be loaded into ASMON / ASMEN for editing and assembly into machine code.


HEASS (program by Laci Haluska) source file. It's a text file in assembly language, to be edited and assembled into machine code using HEASS.


FENAS source file. It's a text file in assembly language, to be edited and assembled into machine code using HEASS.


FENAS source file. It's a text file in assembly language, to be edited and assembled into machine code using HEASS.


This is an absolute system extension. One of the best features of the Enterprise's operating system is using system extensions. After loading an EXT extension file nothing seems to happen, but typing the :HELP command we can detect the new extension at once. Some system extensions run automatically after loading but this is not typical.


The EPROM burnable version of an absolute system extension (only the header differs). EPDOS can load it. The emulator also uses such files, so optional configurations can be created in the emulator using them. Warning! Do not confuse this with the ROM files found in some games converted from Spectrum! These files contain the Spectrum ROM - using them it is easier to convert a game, though the quality is low.


A game loader to provide eternal life (cheat). This is not a standard extension, but it's an Enterprise speciality. It can be found in games folders, enabling the game to be started with eternal life (eternal ammunition, etc.), so it is a runnable file.


EDC Windows application. This is the standard extension for EDC Windows applications. It can be started only after running EDC Windows, of course.


The file format for Enterprise Word Processor documents. Files written in WP (and saved by the SAVE command) should be named with the WP extension.


The file format for HWP, the best word processing software for the Enterprise (the work of Laci Haluska).


A standard text file. TXT files are not traditional on the Enterprise, but by using WP's PRINT command, for example, files "printed" to a disk can be created and called TXT files.


Digitrax Module file. These are MOD pieces of music converted from the PC. Unfortunately they can only be up to 64kb in size, which restricts the audio opportunities. They can be played using the Digitrax Module Player (see: Music heading here) or by the :DTM command of the Iview extension.


Video file, which can be played using IPLAY. (This program is also part of the Multiplay program pack.)


A compressed (game) program. The compression method was developed by Attus. It compresses simple sequences of the same byte occurring as consecutive data elements. It can be loaded using the DTF&TOM program.


Doubly compressed file. A further developed version of TOM. In the first pass it compresses simple sequences of the same byte occurring as consecutive data elements (like TOM), and then the output of the run-length encoding is further compressed in a second pass, using an optimal variable length encoding of byte values based on statistical analysis of the data. Decompression of DTF files is slower but the data compression is very efficient. Most games like this consist of a single file, but for multiple level loader games the individual levels may be stored in separate files. DTF files can be loaded using the DTF&TOM utility (it is fairly slow) or by using the command DL in ZozoTools. If you want to use the DTF&TOM loader, it is best to collect the DTF files together on common disks and copy the loader to all these disks (it does not need much room).


Compressed file. This compressed file can be created with the EPDOS command PP. The compression is less efficient than DTF but it is much easier to use. PCK files can be unpacked any time and EPDOS can load them.


Screen file. First of all, games have this file as their loading screen (in Spectrum format), but SCR can also be a format which can be loaded using the :VLOAD command.


Program file. Games often have files with this extension. It's a file containing a machine code program, but we can not run it directly. It can be run only by using a loader with a COM (or TRN) extension.