IntervalZero RTX

RTX enhances Windows universally adopted look and feel with features that give developers real-time determinism, better control, unmatched dependability.


While developers want the benefits of using Windows® XP, XPe and 2000 – all very powerful automation platforms – they often require a development and execution environment with traditional Real-Time Operating System features, including high performance, reliability and determinism. RTX provides these capabilities to a Windows® based system.
By offering a compliant Win32 API set, RTX application portability is simplified between various Windows® operating systems.


  • Common APIs for all Windows® operating systems (XPe, XP Pro and 2000)
  • RTX API’s allow direct access to physical memory and the I/O addressing space
  • RTX offers a choice of three configurable clocks with a minimum granularity of 100 microseconds.
  • Uniprocessor and multi-processor hardware support
  • Deterministic memory management
  • Comprehensive development and integration tools using well-known and standard Windows® IDE
  • Smallest operating footprint, less than 250K
  • Choice of Round Robin or Preemptive Schedulers, assignable on a per thread basis
  • Priority inversion deadlock avoidance with promotion
  • Real-time HAL extender for interrupt isolation, fast timers, and kernel STOP interception
  • Real-time TCP/IP stack
  • USB SDK with USB 1.1/2.0 host and client support
  • Hyper-Threading support
  • Physical Address Extension (PAE) support
  • Device Driver Wizard – framework for rapid development of RTX device drivers
  • Support for up to 1000 processes, each supporting unlimited threads

RTX Architecture

System Requirements

  • Hardware (HAL)
    • PC Compatible Eisa/Isa HAL
    • ACPI Compatible Eisa/Isa HAL
    • MPS 1.4 – APIC platform HAL
    • ACPI 1.0 – APIC platform MP
  • Software
    • Microsoft Windows XP Embedded
    • Microsoft Windows NT 4.0 Embedded with SP5
    • Microsoft Windows NT 4.0 Workstation and Server with SP6a
    • Microsoft Windows 2000 Server and Professional with SP2
    • Microsoft Windows XP Professional
    • IE 5.01 or higher
    • Visual Studio 6.0 with SP5 (RTX debugging)

Major market

  • Industrial Automation
  • Telecom
  • Test and Measurement
  • Medical
  • Aerospace and Defense
  • Simulation
  • And many others

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