IntervalZero
- RTX Real-Time Extension for Windows
IntervalZero (formerly Ardence and Venturcom) RTX is the only software solution architected as a high-performance
extension to control Microsoft Windows. RTX is proven in thousands
of demanding applications providing enhanced performance, control, scalability
combined with unmatched dependability for: industrial automation; military/aerospace;
test and measurement equipment; robotics; and many other industries
while reducing system costs and speeding time to market.
Deterministic, hard real-time performance – plus the Windows
user experience
Microsoft Windows offers a world-class interface and excellent
development tools for embedded systems. However, for mission-critical threads
that require hard real-time, deterministic responses – e.g. robots,
vision systems, simulators, test and measurement systems – the Windows
scheduler cannot deliver the necessary prioritization and control.
RTX
With IntervalZero’s RTX software, developers
can take advantage of both the Windows environment and form factor, and
also solve all their scheduling, prioritization and control challenges.
RTX is a self-contained real-time subsystem that bypasses the Windows’ scheduler
to provide the desired determinism and hard real-time response.

Download the InternalZero RTX Demonstration Video (8mb)
RTX architecture is a true extension in that it does not encapsulate Windows
and does not interfere with or modify the Windows infrastructure. By maintaining
this separation, the RTX real-time subsystem (RTSS) ensures that RTX-based
applications survive Windows crashes.
The RTX real-time subsystem is designed around a high-speed scheduler that
utilizes both priority-driven and preemptive algorithms. RTX supports
up to 997 independent processes, with each process supporting unlimited
threads. Fine-grained control over applications is assured with 128 levels
of assignable thread priority.

RTX for RealTime Windows spans multiple markets
Industrial Automation
Some of the world’s most demanding
high-speed control and automation applications are running on standard Windows
PCs using IntervalZero’s
Embedded software solutions.
Customers have eliminated their dedicated “real-time” PCs,
DSPs and PLCs in favor of an RTX-enabled unified Windows-based control system.
Using RTX, companies such as Siemens, Honda, MDSI and Hurco are delivering
high-performance control systems for Computerized Numerical Control, Motion-Control,
Material Handling/Sortation and Discrete Control.
The benefits include:
- Reduced material costs
- Reduced development times
- More flexible and customizable systems
- Reduced field-support costs
RTX loads as a driver to Windows and takes over the Windows scheduler and
interrupt service. RTX processes have 128 priority levels - all higher than
Windows and microsecond response time.
RTX has real-time support for all of the popular communication protocols
such as TCP/IP, Modbus TCP, ControlNet/DeviceNet, Profibus, ASI, Industrial
Ethernet and others.
Medical
IntervalZero’s Embedded software delivers
precision, control, and security to medical systems and devices.
Our control and real-time technologies are helping leading medical device
manufacturers get to market faster, increase market share, and reduce system
development and management costs for products such as patient monitors,
imaging machines, device monitors, test and measurement systems, and device
analytics.
In the Medical industry IntervalZero Embedded software is used to:
- Create and maintain HIPAA compliant systems and devices
- Facilitate movement to standards-based hardware and software
- Secure, control and optimize Windows devices
- Integrate image protection and instant on/off capability into Windows
systems and devices
Military Aerospace
Using IntervalZero’s Embedded
software on COTS-based systems is helping companies such as Boeing, Lockheed
Martin, Northrop Grumman and Raytheon meet the demands of the US Military,
US Government agencies, NASA and major airlines.
Developers of Embedded systems for Military and Aerospace understand the
importance of designing for optimum performance, high reliability and long-term
supportability. The trend toward COTS hardware and software is enabling
developers to take advantage of standards-based designs to achieve these
goals while maintaining control of budgets and project deadlines.
Common requirements for developers of military and aerospace systems include:
- Use of standards-based hardware and software: IntervalZero’s
embedded software solutions are designed for the Microsoft Windows
development tools, operating systems and x86 processors.
- High performance and reliability: RTX is a deterministic control
solution for Windows-based systems. It restricts latencies to the single-digit
microsecond range for optimized performance and high reliability, including
failover.
- Comprehensive Driver Support: RTX improves development efficiency
by providing over 100 of the most common drivers – for communications
and board support.
- Support of past, present and future architectures: With product
support from DOSx through Windows Vista, IntervalZero, a Gold Level
Windows Embedded partner, is committed to long-term support and integration.
- Risk mitigation: IntervalZero’s long experience and expertise in
Embedded system development, along with availability of training, support
and design services, ensure that even the most complex projects are completed
on time and on budget.
Test and Measurement
IntervalZero’s Embedded software helps the Test
and Measurement industry meet the demand for greater functionality and flexibility
from their T&M
tools at a cost-effective price. IntervalZero’s real-time software
delivers greater functionality and flexibility and increases the performance
of test systems that are increasingly reliant on PCs.
Key Features
- Robust, High-performance Windows RTOS Extension
in Ring 0: sustained interrupt rates of 30 KHz
- Smallest operational footprint - 250KB
- Support for all standard Microsoft HALs: including ACPI compliant
PIC, uni-processor and multi-processor APIC
- Comprehensive Microsoft Windows operating system support: Windows
XP Pro, XP Embedded, 2000, Server 2000 and Server 2003
- Win32 API compliant: no need to use code wrappers for API mapping
- Complete x86 CPU support: including multi-processor and multi-core
in either shared or dedicated mode
- Microsoft’s Visual Studio 6.0, .NET 2002, .NET 2003 and 2005:
develop, compile and debug in the standard Windows development environment
- Priority Inversion Avoidance with Promotion: ensures that lower
priority threads do not impact application
- performance
- Priority-driven or preemptive scheduling: assignable on a per thread
basis
- WinSock compliant TCP/IP stack: independent of Windows
- High-speed Inter-Process Communication (IPC) mechanism
Direct Downloads
RTX Whitepaper
Hard Real-Time with IntervalZero RTX on the Windows Platform
Download the Whitepaper PDF
Download the RTX Compatibility
Matrix PDF
RTX Supported Network Interface Cards
Network Cards that are supported by the RTX Product.
Download the RTX Supported Network
Interface Cards PDF
RTX Drivers
RTX device drivers available from RTX driver partners.
Download the RTX Drivers PDF





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