Motorola 6806800C08B manual Message Distribution Service Software Components

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NetPlane Core Services

Message Distribution Service

 

 

The following figure provides an overview of the components that constitute the MDS.

Figure 2-7 Message Distribution Service Software Components

The MDS Services API make the MDS available to its clients, i.e. other NCS services, customer applications or ECC applications. For a detailed description of the API, refer to the Message Distribution Service Programmer's Reference.

The Service Discovery Protocol layer realizes the connection paths between all MDS participants. If connections are broken or connected or participants die, fellow MDS instances are informed asynchronously through callbacks which other services are no longer reachable.

MDS uses the Q.2110 Reliability P2P as underlying communication protocol. It has been adapted slightly to NCS needs and provides:

zTransfer of data with sequence integrity

zError connection by selective retransmission

zError reporting to layer management

The Transport Adaption layer is an abstraction layer which hides the details of the underlying transport protocol. In the Avantellis system Ethernet is used for inter-nodal base fabric communications and POSIX queues are used for intra-nodal communications.

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NetPlane Core Services Overview User’s Guide (6806800C08B)

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Contents NetPlane Core Services Overview Trademarks Contents Contents NetPlane Core Services Overview User’s Guide 6806800C08BList of Tables Page List of Figures Avantellis Main Software ComponentsPage Overview of Contents About this ManualAbbreviations About this Manual Abbreviation Definition HPMConventions Notation DescriptionBold About this Manual Notation Description Summary of ChangesComments and Suggestions Part Number Edition DescriptionIntroduction Avantellis 3000 Series OverviewAvantellis 3000 Series Software Architecture NetPlane SoftwareIntroduction Carrier Grade Linux Operating System Carrier Grade Linux Operating System IntroductionPage NetPlane Core Services Architectural OverviewNCS Services NetPlane Core Services NCS ServicesCorresponding SAF AIS NCS Service Name Services Description NCS Service Name Description Message Distribution ServiceMessage Distribution Service NetPlane Core Services Leap Portability LayerSystem Description Distribution of NCS Services in the Avantellis SystemNetPlane Core Services System Description NCS DirectorsNCS Directors NetPlane Core Services NCS DirectorsNetPlane Core Services NCS Servers NCS ServersSample Applications System Description NetPlane Core Services System DescriptionManagement Access NetPlane Core ServicesManagement AccessDescription Category Management Access Information Flow Management Access NetPlane Core ServicesSAF-Compliant NCS Services Availability ServiceNetPlane Core Services SAF-Compliant NCS Services Availability Service NetPlane Core Services Availability DirectorAvailability Manager Availability Node Director Checkpoint ServiceNetPlane Core Services Checkpoint Service Availability AgentCheckpoint Service NetPlane Core Services Checkpoint DirectorMessage Queue Service Checkpoint Node DirectorCheckpoint Agent Message Queue Director Event Distribution ServiceEvent Distribution Service NetPlane Core Services Message Queue Node DirectorEvent Distribution Server Global Lock ServiceNetPlane Core Services Global Lock Service Event Distribution AgentGlobal Locking Director Motorola Complementary NCS ServicesDistributed Tracing Service Global Lock Node DirectorDistributed Trace Agent HPI Integration ServiceDistributed Trace Server ArchitectureSimple Software Upgrade NetPlane Core Services Simple Software UpgradeSystem Resource Monitoring Service HPI Adaption Private Library HPLPersistent Store-Restore Service Persistent Store ServerManagement Access Services NetPlane Core Services Management Access ServicesPSSv Command Execution Functions System Description ParserManagement Access Agent Object Access AgentCommand Line Interpreter Management Access Point Message-Based Checkpointing ServiceManagement Access Server Snmp Management Access PointInterface Service Interface Node Director Message Distribution ServiceInterface Director Interface AgentsMessage Distribution Service Software Components NetPlane Core Services Message Distribution ServiceLeap Portability Layer Cancelling Application ThreadsLeap Portability Layer NetPlane Core Services Implementation NotesPage NCS Toolkit Toolkit InstallationToolkit Contents IntroductionDevelopment Host Prerequisites Make CommandsBuilding the Samples NCS Toolkit Building the SamplesMake CommandsNCS Toolkit ParametersRunning the Sample programs Target PrerequisitesNCS Toolkit Running the Sample programs Setting Ldlibrarypath Setting Ldlibrarypath NCS ToolkitRunning the Sample Programs Page Related Documentation Motorola Embedded Communications Computing DocumentsDocument Title Publication Number Related Specifications Related Documentation Related SpecificationsDocument Title Version/Source

6806800C08B specifications

The Motorola 68000 microprocessor, particularly the revision marked as 68000C08B, stands out as a seminal component in the evolution of computing technology. Introduced in 1979, the 68000 architecture laid the groundwork for many advanced systems, influencing a multitude of platforms, from personal computers to game consoles.

The Motorola 68000C08B features a 16-bit data bus and a 24-bit address bus, allowing for a memory addressing capability of up to 16 MB. This architecture was pioneering for its time, enabling more extensive and complex software applications than its predecessors. The C08 revision particularly emphasized optimizing power consumption while maintaining performance, making it ideal for embedded systems and portable devices.

One of the 68000's key characteristics is its unique register set, which allows for a versatile range of operations. It consists of 8 general-purpose data registers and 8 address registers. The architecture supports both integer and floating-point operations, thanks to an integrated instruction set that facilitates complex mathematical computations, crucial for applications in graphics and gaming.

In terms of performance, the 68000 processor operates at clock speeds ranging from 8 MHz to 16 MHz, depending on the specific variant. The instruction set architecture (ISA) is known for its orthogonality, meaning that most instructions can be used interchangeably across different registers. This design simplicity allows for efficient coding and faster execution times, a significant advantage for developers.

Another remarkable feature of the 68000C08B is its capability for multitasking and improved context switching. Its advanced memory management, combined with support for virtual memory in later implementations, catered to the needs of operating systems and real-time applications, making it suitable for both consumer electronics and industrial machinery.

The Motorola 68000 family also supports a variety of peripherals, enhancing its flexibility as a microcontroller. This compatibility allowed manufacturers to create diverse product lines, from keypads and mice to modems and hard drives.

In summary, the Motorola 68000C08B microprocessor not only advanced the landscape of computer technology in the late 20th century but also helped set the stage for future innovations through its architecture, performance capabilities, and versatility in numerous applications. Its legacy continues to influence modern computing paradigms, ensuring the 68000 remains an essential chapter in the history of microprocessors.
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