LynxOS
{{Short description|Real-time operating system}}
{{About|the real-time operating system|the web browser|Lynx (web browser)|the game console|Atari Lynx}}
{{Primary sources|date=April 2024}}
{{More citations needed|date=November 2010}}
{{Infobox OS
| name = LynxOS RTOS
| logo =
| screenshot =
| caption =
| developer = Lynx Software Technologies, Inc.
| source model = Closed source
| kernel type = Monolithic, dynamic extendable
| supported_platforms = Motorola 68010, Intel 80386, ARM architecture, PowerPC
| ui = Command line interface
| family = Unix-like real-time operating system
| released = {{Start date and age|1986}}
| latest release date = {{Start date and age|2020|02|20}}
| marketing target = Embedded systems
| programmed in = Ada, C, C++, Rust
| language = English
| update model =
| package manager =
| working state = Current
| license = Proprietary
| website = {{URL|www.lynx.com/products/lynxos-posix-real-time-operating-system-rtos}}
}}
The LynxOS RTOS is a Unix-like real-time operating system from Lynx Software Technologies (formerly "LynuxWorks"). Sometimes known as the Lynx Operating System, LynxOS features full POSIX conformance and, more recently, Linux compatibility.{{Citation needed|date=May 2024|reason=There is no mention of Linux comparability in any of the referenced sources}} LynxOS is mostly used in real-time embedded systems, in applications for avionics, aerospace, the military,{{cite web |url=https://arstechnica.com/information-technology/2013/10/the-navys-newest-warship-is-powered-by-linux |title=The Navy's newest warship is powered by Linux |date=18 October 2013}} industrial process control and telecommunications.
History
The first versions of LynxOS were written in 1986 in Dallas, Texas, by Mitchell Bunnell and targeted at a custom-built Motorola 68010-based computer. The first platform LynxOS ran on was an Atari 1040ST with cross development done on an Integrated Solutions UNIX machine. In 1988-1989, LynxOS was ported to the Intel 80386 architecture. Around 1989, application binary interface (ABI) compatibility with UNIX System V.3 was added. Compatibility with other operating systems, including Linux,{{Citation needed|date=May 2024|reason=There is no mention of Linux comparability in any of the referenced sources}} followed.
Full Memory Management Unit support has been included in the kernel since 1989, for the reliability of protected memory and the performance advantages of virtual addresses. The PowerPC architecture is also supported, and in February 2015 Lynx announced planned support for the ARM Cortex A-family.{{cite web |url=http://www.lynx.com/lynx-software-technologies-announces-security-product-support-for-new-arm-based-iot-designs/ |title=LynxOS: POSIX Real Time Operating System |website=Lynx Software Technologies}}
LynxOS components are designed for absolute determinism (hard real-time performance), which means that they respond within a known period of time. Predictable response times are ensured even in the presence of heavy input/output (I/O) due to the kernel's unique threading model, which allows interrupt routines to be very short and fast.
Lynx holds an expired patent on the technology that LynxOS uses to maintain hard real-time performance. {{US patent|5,469,571}} was granted to Lynx November 21, 1995: "Operating System Architecture using Multiple Priority Light Weight kernel Task-based Interrupt Handling."
In 2003, Lynx introduced a specialized version of LynxOS named LynxOS-178, especially for use in avionics applications that require certification to industry standards such as DO-178B.
In late 2022, support for the programming language Rust was added to the certified toolchain for LynxOS-178 and LynxElement unikernel.{{cite press release |last=Nelson |first=Kirsten |date=November 2, 2022 |url=https://www.lynx.com/press-releases/rust-compiler-support |title=Lynx Joins AdaCore and Ferrous Systems to Bring Rust to Embedded Developers |website=Lynx Software Technologies |location=San Jose, California}}
The Usenet newsgroup {{mono|comp.os.lynx}} is devoted to discussion of LynxOS.
See also
References
{{Reflist}}
External links
- {{Official website|www.lynx.com/products/lynxos-posix-real-time-operating-system-rtos}}
- [http://www.patents.com/us-5469571.html Patent #5,469,571: LynuxWorks' "Operating System Architecture using Multiple Priority Light Weight kernel Task-based Interrupt Handling."]
- [https://web.archive.org/web/20030418172614/http://lynx.com/products/whitepapers/mmu.php3 Whitepaper: Using the Microprocessor MMU for Software Protection in Real-Time Systems]
- [https://web.archive.org/web/20080828043437/http://www.lynx.com/embedded-os.php3 Applications using LynxOS and other Lynx operating systems]
{{Real-time operating systems}}
{{Unix}}
{{DEFAULTSORT:Lynxos}}
Category:ARM operating systems
Category:Embedded operating systems