FreeVMS
Encyclopedia
FreeVMS is a free software
clone of the VMS
computer operating system
, licensed under the terms of the GNU General Public License
. As of 2010, the project is in the early stages of development. The latest version is 0.4.
It consists of a kernel (planned to be POSIX
-compliant) and a DCL
command-line interpreter.
, Alpha
and IA-64 — FreeVMS originally only supported i386 processors. Recently development has switched to the AMD64 architecture, with i386 development canceled. Plans exist to port FreeVMS to PPC64
and SPARC64
in future.
Free software
Free software, software libre or libre software is software that can be used, studied, and modified without restriction, and which can be copied and redistributed in modified or unmodified form either without restriction, or with restrictions that only ensure that further recipients can also do...
clone of the VMS
OpenVMS
OpenVMS , previously known as VAX-11/VMS, VAX/VMS or VMS, is a computer server operating system that runs on VAX, Alpha and Itanium-based families of computers. Contrary to what its name suggests, OpenVMS is not open source software; however, the source listings are available for purchase...
computer operating system
Operating system
An operating system is a set of programs that manage computer hardware resources and provide common services for application software. The operating system is the most important type of system software in a computer system...
, licensed under the terms of the GNU General Public License
GNU General Public License
The GNU General Public License is the most widely used free software license, originally written by Richard Stallman for the GNU Project....
. As of 2010, the project is in the early stages of development. The latest version is 0.4.
It consists of a kernel (planned to be POSIX
POSIX
POSIX , an acronym for "Portable Operating System Interface", is a family of standards specified by the IEEE for maintaining compatibility between operating systems...
-compliant) and a DCL
DIGITAL Command Language
DCL, the DIGITAL Command Language, is the standard command languageadopted by most of the operating systems that were sold by the former Digital Equipment Corporation...
command-line interpreter.
Architecture
Unlike the traditional target architectures of VMS systems — VAXVAX
VAX was an instruction set architecture developed by Digital Equipment Corporation in the mid-1970s. A 32-bit complex instruction set computer ISA, it was designed to extend or replace DEC's various Programmed Data Processor ISAs...
, Alpha
DEC Alpha
Alpha, originally known as Alpha AXP, is a 64-bit reduced instruction set computer instruction set architecture developed by Digital Equipment Corporation , designed to replace the 32-bit VAX complex instruction set computer ISA and its implementations. Alpha was implemented in microprocessors...
and IA-64 — FreeVMS originally only supported i386 processors. Recently development has switched to the AMD64 architecture, with i386 development canceled. Plans exist to port FreeVMS to PPC64
Ppc64
ppc64 is an identifier commonly used within the Linux and GCC open source software communities to refer to the target architecture for applications optimized for 64-bit PowerPC- and Power Architecture processors, frequently used when compiling source code....
and SPARC64
SPARC64
SPARC64 is a microprocessor developed by HAL Computer Systems and fabricated by Fujitsu. It implements the SPARC V9 instruction set architecture , the first microprocessor to do so. SPARC64 was HAL's first microprocessor and was the first in the SPARC64 brand. It operates at 101 and 118 MHz...
in future.
See also
- OZONEOZONEOZONE is an object-oriented operating system written in the C programming language. Almost everything in the kernel is an object to which can be assigned logical names....
- another operating system inspired by VMS (at least in part)