Multicore – DDC-I

Jennifer September 19, 2023October 26, 2023 Deos, News, Press Release

DDC-I Completes Multicore DO-178C DAL-A Verification for Deos RTOS on ARM and PowerPC Architectures

Phoenix, AZ – September 19, 2023 – DDC-I, a leading supplier of software and professional services for mission- and safety-critical applications, today announced that it has completed multicore DO-178C verification to Design Assurance Level A (DAL A) for its Deos™ DO-178C safety-critical real-time operating system (RTOS) on multiple ARM and PowerPC processors. Deos now provides an off-the-shelf set of DAL-A artifacts for a broad range of ARM and PowerPC multicore processors, including the PowerPC e6500 core and the ARM-based Xilinx Zynq Ultrascale+ MPSoC, NXP QorIQ, Layerscape, S32 (automotive), and iMX processor families. This is the second verified baseline of DDC-I’s multicore kernel technology to DO-178C DAL-A. Verification for Intel’s I7 Tiger Lake and Texas Instruments’ Jacinto are planned for release in the next verified baseline.

“DDC-I has been at the forefront of DO-178C multicore technology development, standardization and verification, with an emphasis on satisfying the CAST-32A and AMC 20-193 objectives for safety-critical operation,” said Greg Rose, vice president of marketing at DDC-I. “Further, Deos takes a different approach to multicore processing versus other certifiable RTOSs by providing technology to reduce cross core interference rather than relying on draconian safety nets as the primary bounding mechanism. Our unique multicore features enable our customers to achieve the highest level of safety-critical operation in the gamut of avionics applications from highly deterministic FADECs and flight controls, to complex high throughput displays and mission computers.”

Deos is a safety-critical embedded RTOS that uses patented technology to deliver the highest possible CPU utilization on multi-core processors. First certified to DO-178 DAL A in 1998, Deos features hard real-time response, time and space partitioning, ARINC-653 and POSIX interfaces and is certified as conforming to the FACE® Technical Standard v3.1 for the Safety Extended and Safety Base Profiles. With an emphasis on safety-critical multicore applications, Deos scales well for all compute- and I/O intensive avionics applications such as those requiring data fusion, and other advanced control and sensor functionality.

DDC-I’s SafeMC™ technology extends Deos’ advanced capabilities to multiple cores, enabling developers of safety-critical systems to achieve best in class multicore performance without compromising safety-critical task response and guaranteed execution time. SafeMC employs a bound multiprocessing (BMP) architecture, safe scheduling, and cache partitioning to minimize cross-core contention and interference patterns that affect the performance, safety and certifiability of multi-core systems. The patented cache partitioning technology is unique to Deos and enables L2/L3 cache segregation at a per-application level. This feature bounds cache jitter to dramatically improve worse-case execution times. Then as a final line of defense against run-bound operation, customers can employ the safety nets of bandwidth restriction for resource over utilization, which protects against catastrophic error conditions. These features enable avionics system developers to address issues that could impact the integrity, safety, performance, and the burden associated with the certification of a multi-core airborne system.

About DDC-I, Inc.

DDC-I, Inc. is a global supplier of real-time operating systems, software development tools, custom software development services, and legacy software system modernization solutions, with a primary focus on mission- and safety-critical applications. DDC-I’s customer base is an impressive “who’s who” in the commercial, military, aerospace, and safety-critical industries. DDC-I offers safety critical real-time operating systems, compilers, integrated development environments and run-time systems for C, C++, and Ada application development. For more information regarding DDC-I products, contact DDC-I at 4545 E. Shea Blvd, Phoenix, AZ 85028; phone (602) 275-7172; fax (602) 252-6054; e-mail sales@ddci.com or visit https://www.ddci.com/pr2311.

Jennifer March 9, 2020March 12, 2020 Deos, News, Press Release

DDC-I Offers Free Webinar on Solving Multicore Processor CAST-32A Avionics Certification Challenges

Phoenix, AZ. March 9, 2020. DDC-I, a leading supplier of software and professional services for mission and safety-critical applications, today announced that it will offer a complimentary webinar on Thursday March 12 at 11:00 AM EDT focusing on multicore processor certification challenges, as highlighted in FAA CAST-32A.

Register Now – https://onlinexperiences.com/Launch/QReg/ShowUUID=6DBD9029-7556-47D4-9AA4-6E79A492EF446&AffiliateData=ddci

Certification authorities and industry suppliers have invested in numerous studies and discussions over recent years to identify the issues multicore processors pose for safety critical systems. Formalized positions of these efforts are the FAA CAST-32A Position Paper. The crux of this paper (regarding software) focuses on bounding and controlling the interference patterns that exists when processor cores share resources. Unless interference patterns are addressed, real-time operations can be erratic and worse case execution (WCE) times can be longer than in a single core system.

This webinar will outline CAST-32A from a software perspective, highlighting the challenges of implementing multicore processors for any avionics developer. It will present Deos SafeMC and show how it helps address CAST-32A concerns. Specifically, the webinar will introduce the means of which Deos SafeMC minimizes and bounds contention issues within multicore environments. For example, Deos cache partitioning and memory pooling features enable the user to configure the memory architecture to minimize cache thrashing. In addition, Deos provides the system architect the tools required to schedule applications across all cores in such a way that developers can coordinate applications such that they minimize conflicts over shared resources. While the webinar uses Deos SafeMC an example of how one can address items brought up in CAST-32A, non-Deos users should also gain an insight into the concern multicore processors pose and to consider way in which they can be resolved.

“Deos SafeMC™ technology provides unique features such as cache partitioning that help developers of multicore avionics software segregate shared L2 cache on both a core-by-core and application-by-application basis, thereby bounding interference, improving determinism and reducing software jitter,” said Greg Rose, vice president of marketing and product management at DDC-I. “As identified by the CAST-32A paper, bounding cross-core interference is essential for certifying multicore systems. This is one of the reasons that Deos has proven to be the superior RTOS for modern avionics systems, and why avionics suppliers are migrating to Deos world-wide.”

Deos is a safety-critical embedded RTOS that employs patented slack scheduling, memory pools and cache partitioning to deliver higher CPU utilization than any other certifiable safety-critical COTS RTOS. First certified to DO-178 DAL A in 1998, Deos provides a FACE Safety Base Profile that features hard real-time response, time and space partitioning, and both ARINC-653 and POSIX interfaces.

SafeMC™ technology extends Deos’ advanced capabilities to multiple cores, enabling developers of safety-critical systems to achieve best in class multicore performance without compromising safety-critical task response and guaranteed execution time. SafeMC™ employs a bound multiprocessing (BMP) extension of the symmetric multiprocessing architecture (SMP), safe scheduling and cache partitioning to minimize cross-core contention and interference patterns that affect the performance, safety criticality and certifiability of multicore systems. These features enable avionics systems developers to address issues that could impact the safety, performance and integrity of a software airborne system executing on Multi-Core Processors (MCP), as specified by the Certification Authorities Software Team (CAST) in its Position Paper CAST-32A for Multi-core Processors.

About DDC-I, Inc.

DDC-I, Inc. is a global supplier of real-time operating systems, software development tools, custom software development services, and legacy software system modernization solutions, with a primary focus on mission- and safety-critical applications. DDC-I’s customer base is an impressive “who’s who” in the commercial, military, aerospace, and safety-critical industries. DDC-I offers safety-critical real-time operating systems, compilers, integrated development environments and run-time systems for C, C++, Ada, and JOVIAL application development. For more information regarding DDC-I products, contact DDC-I at 4545 E. Shea Blvd, Phoenix, AZ 85028; phone (602) 275-7172; fax (602) 252-6054; e-mail sales@ddci.com or visit https://www.ddci.com/pr2003.

Jennifer January 31, 2020January 31, 2020 Deos, News, Press Release, RTOS

RTI Connext DDS Micro Provides FACE™ Conformant Communications Framework for DDC-I’s Deos Avionics Real-Time Operating System

Phoenix, AZ. January 31, 2020. DDC-I, a leading supplier of software and professional services for mission and safety-critical applications, today announced the integration of Real-Time Innovations (RTI) Connext® DDS Micro connectivity framework with DDC-I’s Deos avionics real-time operating system. The integrated platform provides a modular, DDS framework for real-time messaging and information sharing between Deos and FACE^TM applications.

“We’re excited to be working with RTI to offer avionics developers a certified conformant FACE Transport Services Segment (TSS) platform with DDS connectivity that facilitates seamless, safety-critical communications and data exchange between FACE applications and our DO-178 Deos real-time operating system,” said Greg Rose, vice president of marketing and product management at DDC-I. “The integrated solution combines world-class performance and safety certification capabilities with a proven DDS framework that streamlines communications, accelerates integration, and enhances application portability.”

“Deos is an excellent safety-critical RTOS platform for our connectivity software,” states Chip Downing, senior market development director of aerospace and defense at RTI. “Together, Deos and Connext DDS Micro provide an open architecture solution that combines FACE, POSIX, and DDS into a COTS solution stack that reduces integration and certification risk while accelerating time to market and deployment of critical avionics systems.”

RTI Connext DDS Micro provides a small-footprint modular messaging solution and software connectivity framework for resource-limited devices that facilitates information sharing in real time, enabling applications to work together as an integrated system. Based on the Object Management Group® (OMG®) Data Distribution Service™ (DDS) standard, RTI Connext DDS features peer-to-peer communications, optimized publish/subscribe and real-time Quality of Service (QoS).

RTI Connext DDS Micro is designed to meet the demanding requirements of critical airborne systems requiring low latency, high reliability, scalability, security and COTS DO-178C DAL A certification evidence. RTI Connext TSS is the first certified, conformant FACE^™ Transport Services Segment (TSS), enabling rapid interoperability of FACE system components and networked platforms.

About DDC-I, Inc.

DDC-I, Inc. is a global supplier of real-time operating systems, software development tools, custom software development services, and legacy software system modernization solutions, with a primary focus on mission- and safety-critical applications. DDC-I’s customer base is an impressive “who’s who” in the commercial, military, aerospace, and safety-critical industries. DDC-I offers safety-critical real-time operating systems, compilers, integrated development environments and run-time systems for C, C++, Ada, and JOVIAL application development. For more information regarding DDC-I products, contact DDC-I at 4545 E. Shea Blvd, Phoenix, AZ 85028; phone (602) 275-7172; fax (602) 252-6054; e-mail sales@ddci.com or visit https://www.ddci.com/pr2001.

About RTI

Real-Time Innovations (RTI) is the Industrial Internet of Things (IIoT) connectivity company. The RTI Connext® databus is a software framework that shares information in real time, making applications work together as one, integrated system. It connects across field, fog and cloud. Its reliability, security, performance and scalability are proven in the most demanding industrial systems. Deployed systems include medical devices and imaging; wind, hydro and solar power; autonomous planes, trains and cars; traffic control; Oil and Gas; robotics, ships and defense.

RTI is the largest vendor of products based on the Object Management Group (OMG) Data Distribution Service™ (DDS) standard. RTI is privately held and headquartered in Sunnyvale, Calif.

Media Contacts:

Madeline Kalicka

Karbo Communications for RTI

240-427-8961

RTI@karbocom.com

Cameron Emery

Director of Corporate Communications at RTIcameron@rti.com

Jennifer October 29, 2019October 29, 2019 Deos, News, RTOS

DDC-I to Present CAST-32A from a Software Perspective at Multicore for Avionics (MFCA) Workshop

Live demos include first running of Deos safety-critical RTOS on Curtiss-Wright’s quad-core Arm A53-based VPX3-1703 single-board computer

Multicore for Avionics (MCFA) Workshop, Bee Cave, Texas, – October 29, 2019 – DDC-I, a leading supplier of software and professional services for mission- and safety-critical applications, today announced that it will present CAST-32A from a Software Perspective at the Multicore for Avionics (MFCA) Workshop, which will be held at the Sonesta Bee Cave Austin Hotel in Bee Cave Texas on October 29. DDC-I will also present several live multicore demos at the workshop featuring the Deos DO-178C safety-critical real-time operating system and SafeMC multicore technology.

The MFCA workshop, hosted by NXP, gives members unique access to the critical information needed to develop and certify avionics systems using COTS multicore SoCs. In addition to receiving updates on NXP multicore SoC roadmaps (Layerscape, i.MX, automotive S32x families), certification support package presentations, and the latest on software and tools for mixed criticality systems, attendees will have an opportunity to network with key NXP system architects and executives, MFCA peers, and eco-system partners.

Featured among the live demos will be the first running of Deos on Curtiss-Wright’s NXP Layerscape LS1043A Arm Quad-core A53 processor-based V3-1703 module, the industry’s first DAL A safety-certifiable Arm processor-based single board computer (SBC). The demo provides an excellent example for system designers who are interested in building complete, rugged DO-254/DO-178 safety-certifiable avionics systems based on the Deos RTOS for aerospace, military and other high reliability markets. Deos with SafeMC technology will also be featured running on NXP’s i.mx8qm Quad Max development board.

“Deos SafeMC™ technology provides unique features such as cache partitioning that help developers of Arm-based multicore avionics software segregate shared L2 cache on both a core-by-core and application-by-application basis, thereby bounding interference, improving determinism and reducing software jitter,” said Greg Rose, vice president of marketing and product management at DDC-I. “As highlighted in the FAA’s CAST-32A paper, bounding cross-core interference is essential for certifying multicore systems. This is one of the reasons that Deos has proven to be the superior RTOS for modern avionics systems, and why avionics suppliers are migrating to Deos world-wide.”

Deos is a safety-critical embedded RTOS that employs patented slack scheduling, memory pools, and cache partitioning to deliver higher CPU utilization than any other certifiable safety-critical COTS RTOS. First certified to DO-178 DAL A in 1998, Deos has been utilized to host a multitude of flight-critical functions, such as air data computers, air data inertial reference units, cockpit displays, flight control, flight management, engine control, and many more.

DDC-I’s SafeMC™ technology extends DDC-I’ s advanced time and space partitioning capabilities to multiple cores, enabling developers of safety-critical systems to achieve best in class multicore performance without compromising safety-critical task response and guaranteed execution times.

About DDC-I, Inc.

DDC-I, Inc. is a global supplier of real-time operating systems, software development tools, custom software development services, and legacy software system modernization solutions, with a primary focus on mission- and safety-critical applications. DDC-I’s customer base is an impressive “who’s who” in the commercial, military, aerospace, and safety-critical industries. DDC-I offers safety-critical real-time operating systems, compilers, integrated development environments and run-time systems for C, C++, Ada, and JOVIAL application development. For more information regarding DDC-I products, contact DDC-I at 4545 E. Shea Blvd, Phoenix, AZ 85028; phone (602) 275-7172; fax (602) 252-6054; e-mail sales@ddci.com or visit https://www.ddci.com/pr1914

Jennifer June 25, 2019June 25, 2019 Uncategorized

DDC-I Announces Safety-Critical Deos RTOS for Mercury’s ROCK-2 OpenVPX Mission Computing & Avionics Architecture

Save time and money developing and certifying high-performance multi-core mission-critical computers to DO-178

Phoenix, AZ – June 25, 2019 – DDC-I, a leading supplier of software and professional services for mission- and safety-critical applications today announced the Deos DO-178 safety-critical real-time operating system (RTOS) compatibility with Mercury’s ROCK-2 mission computing architecture. Compute solutions based on the ROCK-2 architecture running Deos RTOS greatly simplifies the flight-safety certification process of mission-critical computers to reduce program risk, while saving cost and time.

The ROCK-2 architecture features BuiltSAFE™ technology, bringing the highest level of flight-safety assurance to aerospace and defense applications. BuiltSAFE is an open systems-compliant, 3U OpenVPX™ form factor that is fully compatible with the Sensor Open Systems Architecture (SOSA). Together, ROCK-2 and BuiltSAFE™ offer customers an extensive portfolio of interoperable NXP^® and multi-core Intel^® based processing hardware, software, networking, datalink, graphics and I/O building blocks with supporting flight-safety certification artifacts, so their solutions can be deployed quickly with less program and schedule risk, and at a lower total cost of ownership than traditional systems. From design to full product support, the included reusable DAL artifacts simplify the flight-safety certification process for both hardware (DO-254) and software (DO-178B/C) for greater program velocity with reduced risk.

“Deos’ time and space partitioning, SafeMC multicore technology, and IOI deterministic data distribution service are a perfect fit for ROCK-2’s modular, multi-slot, multi-partitioned hardware architecture,” said Greg Rose, vice president of marketing and product management at DDC-I. “Deos makes it easy for avionics designers to take full advantage of ROCK-2 multiprocessing, whether it be multiple cores on a single module, or multiple processors spanning several modules.”

“ROCK-2 based solutions running Deos provide a flexible, reusable platform that delivers best-in-class processing with extensive I/O, networking, and multi-media capabilities,” said Ike Song, Mercury’s Vice President and General Manager for Mercury’s Mission Systems group. “Our customers now have an affordable, high-performance COTS platform with which to develop their highly converged mission and avionics processing solutions with, a platform which delivers an accelerated and low risk path to flight safety certification.”

Deos is a field proven, safety-critical, avionics RTOS that is used to host a multitude of flight critical functions, such as air data computers, air data inertial reference units, cockpit video, displays and flight instrumentation, flight management systems, engine management, and many more. Built from the ground up for safety-critical applications, Deos is the only certifiable time- and space-partitioned COTS RTOS created using RTCA DO-178, Level A processes from the very first day of its product development. Deos’ unique modular design and verification evidence provides the easiest, lowest cost path to DO-178C DAL A certification, the highest level of safety criticality. DDC-I’s SafeMC™ technology extends DDC-I’ s advanced time and space partitioning capabilities to multiple cores, enabling developers of safety-critical systems to achieve best in class multicore performance without compromising safety-critical task response and guaranteed execution times.

About DDC-I, Inc.

DDC-I, Inc. is a global supplier of real-time operating systems, software development tools, custom software development services, and legacy software system modernization solutions, with a primary focus on mission- and safety-critical applications. DDC-I’s customer base is an impressive “who’s who” in the commercial, military, aerospace, and safety-critical industries. DDC-I offers safety-critical real-time operating systems, compilers, integrated development environments and run-time systems for C, C++, Ada, and JOVIAL application development. For more information regarding DDC-I products, contact DDC-I at 4545 E. Shea Blvd, Phoenix, AZ 85028; phone (602) 275-7172; fax (602) 252-6054; e-mail sales@ddci.com or visit https://www.ddci.com/pr1908.

Mercury Systems – Innovation That Matters^®

Mercury Systems is a leading commercial provider of secure sensor and safety-critical processing subsystems. Optimized for customer and mission success, Mercury’s solutions power a wide variety of critical defense and intelligence programs. Headquartered in Andover, Mass., Mercury is pioneering a next-generation defense electronics business model specifically designed to meet the industry’s current and emerging technology needs. To learn more, visit www.mrcy.com and follow us on Twitter.

Jennifer April 12, 2019April 12, 2019 Uncategorized

DDC-I Debuts Multicore Integrated DO-178 Display Systems at Army Aviation Mission Solution Summit

Power Architecture and i.MX8 platforms equipped with Deos DO-178 RTOS supporting 3D synthetic vision

BOOTH 936

Nashville, TN – April 12, 2019. DDC-I, a leading supplier of software and professional services for mission- and safety-critical applications, today announced that it will present a pair of live avionics demonstrations featuring high-end graphics and display capabilities at the Army Aviation Mission Solution Summit, which runs from April 14-16 at the Gaylord Opryland Hotel & Convention Center in Nashville, TN. The first, employing a ruggedized Curtiss Wright NXP Power Architecture T2080-based VPX3-152 OpenVPX single-board computer equipped with DDC-I’s safety-critical Deos real-time operating system and CoreAVI OpenGL graphics, supporting 3D synthetic vision utilizing Ensco IData and IDataMap display software. The second demo, featuring an i.MX8 reference platform running Deos and CoreAVI graphics, will showcase high-end display capabilities utilizing Ansys display software.

The annual Army Aviation Mission Solution Summit, sponsored by the Army Aviation Association of America (AAAA), is the only opportunity for the entire Army aviation community to gather in one place at one time focused solely on Army Aviation issues. The summit provides unique opportunities for the community to network, be recognized, have its voice heard, and support our soldiers and their families. Attending the summit will be soldiers (active, National Guard, and reserves), veterans and retirees, special operations, MEDEVAC, and industry leaders in R & D, simulation, acquisition, logistics, training, doctrine, and maintenance. This year’s edition will feature a Hall of Fame Induction Banquet and close with a Soldier Appreciation Dinner Concert featuring Lee Brice and Ryan Weaver.

“We’re excited to be part of the Army Aviation Mission Solution Summit and look forward to demonstrating our integrated safety-critical platform to the Army aviation community,” said Greg Rose, vice president of marketing and product management at DDC-I. “ Multicore COTS systems equipped with Deos and advanced display capability provide an ideal platform for rapid development, certification, and deployment of safety-critical software for a broad range of Army aviation applications.”

DDC-I’s Deos is a field proven, safety-critical, multicore avionics RTOS that is used to host a multitude of flight critical functions, such as air data computers, air data inertial reference units, cockpit video, displays and flight instrumentation, flight management systems, engine management, and many more. Built from the ground up for safety-critical applications, Deos was the first RTOS certified to DO-178 DAL A, and is the only certifiable time- and space-partitioned COTS RTOS that has been created using RTCA DO-178, Level A processes from the very first day of its product development.

Deos features deterministic real-time response as well as time and space partitioning. Deos also features patented slack scheduling and cache partitioning, which enables it to deliver higher CPU utilization than any other certifiable safety-critical COTS RTOS. Deos is supported on x86, ARM, and PowerPC microprocessors.

About DDC-I, Inc.
DDC-I, Inc. is a global supplier of real-time operating systems, software development tools, custom software development services, and legacy software system modernization solutions, with a primary focus on mission- and safety-critical applications. DDC-I’s customer base is an impressive “who’s who” in the commercial, military, aerospace, and safety-critical industries. DDC-I offers safety-critical real-time operating systems, compilers, integrated development environments and run-time systems for C, C++, Ada, and JOVIAL application development. For more information regarding DDC-I products, contact DDC-I at 4545 E. Shea Blvd, Phoenix, AZ 85028; phone (602) 275-7172; fax (602) 252-6054; email sales@ddci.com or visit https://www.ddci.com/pr1906.

Jennifer February 28, 2019February 28, 2019 Uncategorized

DDC-I to Offer Training for Avionics Developers Targeting Deos DO-178 Real-Time Operating System

Session to focus on Deos development fundamentals, ARINC 653, and multicore technology

Phoenix, AZ. Feb 28, 2019. DDC-I, a leading supplier of software and professional services for mission- and safety-critical applications, today announced that it will offer a three-day training program for avionics software developers targeting the Deos real-time operating system, with an emphasis on the Deos development process, ARINC 653, and multicore development. The three-day program will be offered at the SpringHill Suites Marriott at DFW Airport in Dallas, TX from March 5-7.

Participants will learn how to install and utilize the DDC-I Development Environment and Deos Application Programming Interface (API) to develop, debug, and build executable programs to run under Deos, including how to define time and space quota requirements, and how to configure, control, and access platform resources.

Having mastered Deos fundamentals, attendees will receive a primer on how ARINC 653 works within the Deos environment. Participants will learn how to define ARINC 653 partitions, how to optimize time frames within those partitions, and how to combine Deos native threads with ARINC 653 partitions. Developers will also learn how to utilize Deos communications services like sampling ports, queues and IOI, and how to configure health monitoring.

The three-day program will also include a session on multicore development. In this segment, participants will receive an overview of DDC-I’s Deos SafeMC multicore technology, including scheduling features, memory model concepts such as fences, memory pools, and cache partitioning, and how to migrate applications from single-core to multi-core systems.

“Avionics developers targeting the Deos real-time operating system will find everything they need to hit the ground running with the industry’s most advanced safety-critical real-time operating system,” said Greg Rose, vice president of marketing and product management at DDC-I. “They will also learn how to utilize ARINC653 within the Deos environment and how to take full advantage of our SafeMC multi-core technology.”

About Deos

RTOS certified to DO-178 DAL A and is the only certifiable time- and space-partitioned COTS RTOS that has been created using RTCA DO-178, Level A processes from the very first day of product development. Deos features deterministic real-time response as well as time and space partitioning. Deos also features patented slack scheduling and cache partitioning, which enables it to deliver higher CPU utilization than any other certifiable safety-critical COTS RTOS.

About DDC-I, Inc.

DDC-I, Inc. is a global supplier of real-time operating systems, software development tools, custom software development services, and legacy software system modernization solutions, with a primary focus on mission- and safety-critical applications. DDC-I’s customer base is an impressive “who’s who” in the commercial, military, aerospace, and safety-critical industries. DDC-I offers safety-critical real-time operating systems, compilers, integrated development environments and run-time systems for C, C++, Ada, and JOVIAL application development. For more information regarding DDC-I products, contact DDC-I at 4600 E. Shea Blvd, Phoenix, AZ 85028; phone (602) 275-7172; fax (602) 252-6054; e-mail sales@ddci.com or visit https://www.ddci.com/pr1904