Motorola 6806800C08B manual NetPlane Core Services NCS Services

Models: 6806800C08B

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NetPlane Core Services

NCS Services

 

 

2.1.1NCS Services

The following table lists and briefly explains the NCS services that implement the Service Availability Forum (SAF) Application Interface Specification (AIS).

Table 2-1 SAF Compliant NCS Services

 

Corresponding SAF AIS

 

NCS Service Name

Service(s)

Description

 

 

 

Availability Service

Application Management

This service provides a standardized means

(AvSv)

Framework (AMF) and

to model system components and

 

Cluster Membership

standardized mechanisms for monitoring,

 

Service (CLM)

fault reporting, fault recovery and repair of

 

 

components. It furthermore provides

 

 

functionality that oversees cluster nodes as

 

 

they join and leave the cluster.

 

 

 

Checkpoint Service

Checkpoint Service

This service oversees the life and integrity of

(CPSv)

(CKPT)

entities called checkpoints. Active

 

 

components write to checkpoints so that

 

 

stand-by components recover the last known

 

 

good state while turning active.

 

 

CPSv coordinates the creation and deletion

 

 

of checkpoints and maintains the checkpoint

 

 

inventory within a cluster.

 

 

 

Message Queue Service

Messaging Service

This service provides a standardized means

(MQSv)

(MSG)

for distributed applications to send messages

 

 

among themselves. MQSv oversees entities

 

 

called queues and queue groups and is

 

 

capable of preserving unread messages if a

 

 

reader process dies.

 

 

 

Event Distribution Service

Event service (EVT)

This service provides a standardized means

(EDSv)

 

to publish events and to subscribe to events

 

 

anywhere in a cluster.

 

 

 

Global Lock Service

Locking Service (LCK)

This service provides a means to control

(GLSv)

 

access to a cluster resources by competing

 

 

distributed clients.

 

 

 

Further details about each of these services will be given in the following sections.

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

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Motorola 6806800C08B NetPlane Core Services NCS Services, Corresponding SAF AIS NCS Service Name Services Description

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.