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Microsoft Windows NT Embedded 4.0

Microsoft Windows NT Embedded 4.0. A Technical Overview Microsoft Corporation. Agenda. Authoring Tools Embedded-Enabling Features Run-time configuration enforcement. Windows NT Embedded allows you to efficiently create reliable and economical mid-range and high-end embedded solutions.

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Microsoft Windows NT Embedded 4.0

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  1. Microsoft Windows NT Embedded 4.0 A Technical Overview Microsoft Corporation

  2. Agenda • Authoring Tools • Embedded-Enabling Features • Run-time configuration enforcement Windows NT Embedded allows you to efficiently create reliable and economical mid-range and high-end embedded solutions

  3. Authoring Tool-Set • Host/Target approach • System/Application capabilities are defined on the Windows NT host through the authoring tool • “Build” process generates the target system run-time image • Image is a configured system - ready to run • Advantage - Configure-To-Build • Core OS binaries are unmodified (Windows NT4+SP5) • Application compatibility is maintained • System upgrades/updates are simpler

  4. Windows NT Embedded Target Generation

  5. Target Designer • Enables developers to easily define and generate custom target runtime images for embedded devices • Selectable target operating-system features • Automatically tracks component inter-dependencies • Workstation, as well as Server-class features • Extensible environment for the inclusion of additional components • e.g. in-house (app), 3rd party (apps, drivers) • Generates a bootable system • Unique SIDs, correct PID

  6. Component Designer • Enables developers to package operating system features or applications into components which can be used in Target Designer • Define component interdependencies • Author registry information • Define placement in the Target Designer component tree (namespace) • Component definition is imported into TD

  7. Embedded-Enabling Features • “Headless” Support • Allows a Windows NT Embedded system to run without any mouse/keyboard/video hardware. • Null VGA video driver removes hardware dependency • All Win32 apps run unmodified • All GDI calls behave as expected • Screen bitmap retained (e.g. GetPixel()) • N.B - BIOS must be capable (e.g. no kbd)

  8. Embedded-Enabling Features • Flash Media Support • Allows an Windows NT Embedded system to boot and operate without a physical disk drive. Flash will be exposed as a block mode device for file systems. • M-Systems DiskOnChip2000 is the supported hardware • NTFS and FAT support • Compression, Security • Maximum capacity - 144MB (uncompressed) • Automatic, transparent wear-leveling

  9. Embedded-Enabling Features • Write Filter Driver • Redirects disk writes to an in-memory cache • Underlying media appears R/W to applications and system • FAT only at this time. NTFS is being investigated for inclusion.

  10. Embedded-Enabling Features • CD Boot Driver • Supports the El-Torito bootable CD-ROM format. • Boot and run Windows NT from CD • Used in conjunction with the Write Filter driver • Allows the CD to be viewed as a standard block device • e.g. no CDFS

  11. Embedded-Enabling Features • Flexible Page File Support • WinLogon and registry modifications • Configuration may include pre-defined paging files • fixed size • Run without a paging file • Profile dynamic memory usage • Application Developers must Size RAM appropriately

  12. Embedded-Enabling Features • Network-related features • Participating in a domain • Workstation, server • Cloning • Unique SIDs for multiple images • Broad spectrum of Windows NT technology • DHCP, RPC, DCOM, WBEM

  13. Embedded-Enabling Features • Remote Management infrastructure • Option 1 - text-mode • remote command prompt • TCP/IP (Telnet) with authentication option • Modem/Serial • Logon required - impersonates user credentials • Option 2 - graphical • remote application GUI • TCP/IP only

  14. Embedded-Enabling Features • Enhanced support for error-reporting • Automatic handling of error dialogs • Global logging of all error dialogs and message boxes. • Modification to USER32.DLL • Only available on Windows NT Embedded systems

  15. Run-time Configuration Enforcement • Only load executables configured for the target • Assures machine configuration • Enables more flexible licensing • Configuration is identifiable as Windows NT Embedded • Not a retail system • Triggers enforcement mechanism

  16. Summary - Benefits • Full Win32 compatibility • Familiar development environment • Rich operating system services and peripheral support • Huge 3rd party presence • Commodity PC hardware • Reduced time to market • Excellent platform for complex application systems!

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