Motorola Complementary NCS Services

NetPlane Core Services

 

 

There is an active and a stand-by GLD running respectively on the two system manager nodes. GLD uses the NCS Message based Checkpoint Service to keep the two synchronized and available for failover situations.

2.5.5.2.1Global Locking Director

The Global Locking Director performs the following tasks:

z Generating unique IDs referred to by an application process

z Naming one of the Global Locking Node Director (GLND) subparts as master of a particular resource

z Reelecting a new master GLND for a resource if a GLND has left the system

2.5.5.2.2Global Lock Node Director

The Global Lock Node Director (GLND) runs as process on all the payload and system controller nodes. Its main tasks are:

z Managing the resource open and lock operation initiated by GLAs.

z For a particular resource, the GLND designated by GLD act as Master. This Master GLND is responsible for managing the lock and unlocks operations on those resources.

z GLND maintains the persistence state information in a shared memory to protect against GLND crashes and restarts

2.5.5.2.3Global Locking Agent

A Global Locking Library (GLA) is a linkable library which makes the respective GLSv APIs available to applications.

2.6Motorola Complementary NCS Services

This section describes in more detail the Motorola complementary NCS services which were introduced to complement the NCS services that implement SAF APIs.

2.6.1Distributed Tracing Service

The Distributed Trace Service (DTSv) organizes, normalizes and manages logging activities among all cooperating processes within a system.

The DTSv provides the means to describe pipes that can perform operations such as read- write, filter, sort and store selectively screened logging data. The service functionality includes the creation of customized pipes as well.

2.6.1.1Architecture

The DTSv consists of two components:

zDistributed Trace Server

zDistributed Trace Agent

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

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Motorola 6806800C08B manual Motorola Complementary NCS Services, Distributed Tracing Service, Global Locking Director
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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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