Oddly named Arizona-headquartered software and professional services company DDC-I has announced the availability of the world's first commercial real-time operating system (RTOS) products supporting the ARINC Specification 653, Part 4 strict subset. The Part 4 subset has been specifically defined for systems that do not require the size, complexity, and features of the full specification, such as the majority of the Line Replaceable Units (LRU) on next-generation aircraft. DDC-I offers the interfaces and scheduling model of Part 4 with two new variants of the field proven Deos RTOS.
"These two new products further our mission of providing best-in-class COTS RTOS solutions for the safety-critical, DO-178B certifiable, avionics software market," said Bob Morris, president and CEO of DDC-I. "Customers who have avoided leveraging the full ARINC 653 Part 1 and Part 2 subsections, due to the complexity and high cost of the commercial offerings, now will have the opportunity to leverage the benefits of this powerful new capability. These two new products deliver standards conformance at an exceptional value point targeted at the needs of avionics LRU providers." (Note: COTS acronym denotes Commercial Off The Shelf.)
"The ARINC standard enhances application portability and improves reuse for safety-critical software development and certification," added Vance Hilderman, president of Atego/HighRely and the principal author of Avionics Certification, A Complete Guide to DO-178 (Software) and DO-254 (Hardware). "Deos653p4 users targeting these products will benefit from the streamlined ARINC 653 Part 4 subset when developing avionics software for the myriad of devices that can benefit from the simplified ARINC 653 Part 4 programming model."
ARINC Specification 653 defines an application/executive interface between an avionics computer's operating system and application software that simplifies software design, enhances portability and reuse, and reduces the cost of avionics software certification. ARINC 653 Part 4 utilizes a simplified execution model with a time- and space-partitioned software environment that allows multiple partitions with only one or two processes per partition. The lightweight specification maintains compatibility with ARINC 653 Part 1 while simplifying software design and dynamic behavior, thereby reducing the OS footprint, overhead, complexity, with the ability to deliver strong real-time performance.