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under the terms of the MIT license.
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under the terms of the MIT license.
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For the time being, it is an incomplete, "work in progress" project. The goal
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For the time being, it is an incomplete, "work in progress" project. The goal
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is to make SvarCOM the default SvarDOS shell, replacing FreeCOM.
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is to make SvarCOM the default SvarDOS shell, replacing FreeCOM.
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Why replacing FreeCOM, you ask? See FREECOM.TXT for details.
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*** Why replacing FreeCOM, the FreeDOS COMMAND.COM? ***
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FreeCOM is an impressive piece of software, but there are a few things that I
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Since SvarCOM is a work-in-progress effort, it still lacks a few things:
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do not like about it. SvarCOM is my attempt at addressing these things.
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- FreeCOM is not suitable for low-memory machines. It takes about 55K of
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conventional memory when XMS is unavailable. XMS being a 386+ thing, FreeCOM
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is a poor fit for pre-386 machines. There is the KSSF hack, but it is a
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- no support for redirections or pipes (eg. file.exe | more > out.txt)
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kludge with many limitations. As pointed out by one of the FreeCOM authors,
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FreeCOM is designed with 21'st century machines in mind and not IBM PC
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compatibles (or "museum computers", as they refer to them).
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https://www.mail-archive.com/freedos-user@lists.sourceforge.net/msg23472.html
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SvarDOS will not rely on XMS, and performs runtime swapping that works on
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any IBM PC compatible machine.
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- no batch file support
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- FreeCOM requires custom NLS files. While the vast majority of FreeDOS
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programs use a single "standard" (CATS/Kitten), FreeCOM uses a different
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approach with pre-compiled NLS strings, which makes it necessary to
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distribute as many binary blobs as there are supported languages. It also
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- few internal commands missing: BREAK, CHCP, CLS, CTTY, LH, REN, COPY, DATE,
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makes the translation process much more difficult.
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SvarDOS will use Kitten-style translations, like other applications.
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- FreeCOM is a complex beast: it aims for compatibility with multiple
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compilers and supports many embedded features. This makes the code uneasy to
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follow and changes require careful testing on all supported compilers and
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all possible build variants.
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SvarDOS, on the other hand, is meant to be simple and universal. It is meant
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to be compiled with OpenWatcom only, which makes a ton of IFDEF's go away.
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It also won't integrate features that can be reasonably implemented as
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third-party tools (typically: DOSKEY). It strives to reimplement the
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functionalities of MS-DOS 5/6.
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TIME, VOL, PAUSE, ECHO, IF, REM, SHIFT
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- FreeCOM code is released under the terms of a toxic (GPL) license that
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restrain the freedom of its users due to its virality.
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Latest version available here: http://svardos.osdn.io/svarcom
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=== INTERNAL COMMANDS ========================================================
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SvarCOM implements the following internal commands. For help on each command,
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run it with a "/?" argument.
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CD/CHDIR - displays the name of or changes the current directory
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DEL/ERASE - deletes one or more files
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DIR - displays a list of files and subdirectories in a directory
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EXIT - quits the command.com program (command interpreter)
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MD/MKDIR - creates a directory
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PATH - displays or sets a search path for executable files
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PROMPT - changes the DOS command prompt
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RMDIR - removes (deletes) a directory
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SET - displays, sets or removes DOS environment variables
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TYPE - displays the contents of a text file
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VER - displays the DOS version
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VERIFY - tells DOS whether to verify that files are written correctly
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=== LICENSE ==================================================================
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SvarCOM is released under the terms of a liberal and permissive (MIT)
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SvarCOM is published under the terms of the MIT license.
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Copyright (C) 2021 Mateusz Viste
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Permission is hereby granted, free of charge, to any person obtaining a copy
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of this software and associated documentation files (the "Software"), to deal
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license that does not impose limitations on how users may or may not use it.
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in the Software without restriction, including without limitation the rights
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to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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copies of the Software, and to permit persons to whom the Software is
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furnished to do so, subject to the following conditions:
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The above copyright notice and this permission notice shall be included in all
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copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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SOFTWARE.
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==================================================================== [EOF] ===
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