NetPlane Core Services

Interface Service

 

 

2.6.7.1Basic Functionality

The main tasks of the MBCSv are:

zDynamic discovery of peer entities

zProviding an interface to the active entity for checkpointing the state updates to the stand- by peers

zWhenever the clients’s role changes to stand-by from any other role or whenever a new active client is detected, the client synchronizes its state with that of the active client (cold synchronization)

zPeriodic synchronization of the client’s state with that of the currently active client to obtain an abbreviated summary account (warm synchronization)

zDriving client behavior depending on the HA role assigned by the client application

2.6.7.2Architecture

The only component of the MBCSv is the Message-Based Checkpointing Agent (MBCA). It provides stateful, message-based checkpoint replication services for its clients. For more details about the MBCA refer to the Message Based Checkpointing Service Programmer's Reference.

2.6.8Interface Service

The Interface Service (IfSv) provides a common means of configuring physical and logical interface information in the NCS system, and allowing that information to be distributed to all applications and services within the system.

2.6.8.1Basic Functionality

The IfSv provides a means by which applications and NCS services can delete and modify interface information for which they are responsible.

The IfSv supports the MIB II Interfaces group of managed objects as well as some Motorola extensions. Furthermore IfSv supports the RMON-MIB defined in RFC 2819 and RMON2-MIB defined in RFC 2021.

The IfSv interfaces with an ifIndexAlocator Platform Service in order to define an ifIndex value for each interface created. If this service is not provided, IfSv generates an ifIndex using an internal mechanism.

2.6.8.2Architecture

The IfSv consists of the following components:

zInterface Director

zInterface Agents

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

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Motorola 6806800C08B manual Interface Service

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.