PHOENIX, 5 April 2012. DDC-I’s commercialreal-time operating system (RTOS) products support the ARINC Specification 653, Part 4 strict subset. The subset is specifically defined for systems that do not require the size, complexity, and features of the full specification, such as a majority of Line Replaceable Units (LRUs) on next-generation aircraft.
Deos 653p4 provides an enhanced hybrid solution offering the rate monotonic slack scheduling, interrupt driven response, binary reuse, and I/O middleware features of Deos, as well as support for the Part 4 services and scheduling model.
"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," explains 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.”
“The ARINC standard enhances application portability and improves reuse for safety-critical software development and certification,” says 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 653 Part 4 uses a simplified execution model with a time-and space-partitioned software environment that allows multiple partitions with only one or two processes per partition.
ARINC Specification 653 Part 4 is defined by the AEEC Application/Executive (APEX) Subcommittee, which is co-chaired by representatives from Airbus and Boeing, and includes representation by Dassault, Embraer, GE Aviation, Honeywell, Rockwell Collins, Thales, and other industry leaders. AEEC is the Airlines Electronic Engineering Committee, the body responsible for ARINC Standards.