Video Cabinet

VisuaLink Codec

POWER

HEADSET

POWER LINE

B1 B2-B6

Video Monitor

Application Configurations 2-3

Roll-About Components

The Roll-About incorporates the following components into one easy to move unit for videoconferencing:

Video Cabinet

VisuaLink 128 or VisuaLink 384 Codec

Video Monitor

Motion Camera

Microphone

Cable Kit

Video Cabinet

The Roll-About uses a cabinet (RA 128/384) that contains all components that mount in or on the cabinet to make an all-in-one videoconferencing unit. There is additional room in the cabinet for a VCR or Laser Disk player. A power switch is located on the cabinet, so all Roll-About components can be turned on or off with one button touch. The monitor is braced to prevent it from slipping from the top of the cabinet.

VisuaLink 128/384

Depending on the requirement, either a VisuaLink 128 or VisuaLink 384 (both include infrared remote control) would be incorporated into the Roll-About.

Video Monitor

The Roll-About includes a Sony Trinitron® 27 or 32 inch video monitor (depending on selected option). The monitor sits on the video cabinet at the appropriate height for most viewing applications.

The monitor includes the following features:

On-screen menus for configuring the VisuaLink

Picture-in-Picture (PIP) that allows the local site to view their image seen by the distant end

Built-in speakers for far-end audio

VisuaLink 128/384 General Description

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NEC manual Roll-About Components, Video Cabinet, VisuaLink 128/384, Video Monitor

128 specifications

The NEC 128 is a remarkable microprocessor that represents a significant leap in technological innovation during its time. Introduced in the early 1980s, this processor was designed to meet the demands of increasingly sophisticated computing tasks, primarily aimed at the burgeoning field of personal computing and embedded systems.

One of the standout features of the NEC 128 is its 16-bit architecture, which was quite advanced for its era. This architecture allows for a greater data throughput, enabling the handling of larger data sets and providing improved performance over its predecessors. The NEC 128 operates on a clock speed that typically ranges from 4 to 8 MHz, making it capable of executing instructions efficiently and swiftly, which was crucial for running more complex applications.

The processor is built using CMOS technology, which offers significant advantages in terms of power consumption compared to earlier bipolar technology. This characteristic made the NEC 128 not only suitable for desktop computing but also an appealing choice for battery-operated devices, enhancing its versatility. The use of CMOS allowed for a reduced heat output, contributing to the reliability and longevity of devices powered by this microprocessor.

Another noteworthy aspect of the NEC 128 is its support for a variety of addressing modes. This flexibility enables programmers to write more efficient and compact code, optimizing the use of memory resources. By supporting both immediate and indirect addressing, the NEC 128 allows for more dynamic programming, which is essential for developing applications that require real-time processing.

The processor's architecture also includes a robust instruction set that facilitates arithmetic operations, logical operations, and control flow management. This comprehensive instruction set is instrumental for developers, as it provides the necessary tools for creating a wide range of applications, from simple utilities to more complex software systems.

In summary, the NEC 128 microprocessor is characterized by its 16-bit architecture, efficient CMOS technology, and a versatile instruction set, making it a compelling choice for its era. Its combination of performance, power efficiency, and flexibility positioned it as a formidable player in the personal computing market and laid the groundwork for future advancements in microprocessor technology. With its various applications and features, the NEC 128 remains a noteworthy chapter in the history of computing.