Xycom XVME-675 和 XVME-956 是 VMEbus 架构的 PC/AT 模块，均采用 100MHz Intel 处理器并配备 1MB VRAM

核心特性

1. 处理器与性能
   • 搭载 100MHz Intel 处理器（如 Intel 80486DX4），提供当时主流的计算能力，适用于工业控制、数据采集等场景。
   • 1MB VRAM（显存） 支持基本的图形显示需求，可连接 VGA 显示器，满足人机界面（HMI）或简单监控任务。
2. 接口与扩展性
   • 标准 VMEbus 接口：支持 6U 插槽，兼容 VMEbus 背板，可与其他 VME 模块（如 I/O、通信模块）无缝集成。
   • PC/AT 兼容性：提供 PS/2 键盘/鼠标接口、并行端口、串行端口（RS-232）、BNC（10BASE2）和 RJ45（10BASE-T）网络接口，支持传统 PC 外设。
   • SCSI 接口：50 针 SCSI 接口可用于连接外部存储设备（如硬盘、磁带机），扩展数据存储能力。
3. 应用场景
   • 工业自动化：作为 PLC 或 DCS 系统的控制核心，处理实时数据并驱动 HMI。
   • 测试测量：在数据采集系统中负责信号处理与存储。

   • 军事与航空航天：用于需要高可靠性和模块化设计的嵌入式系统。

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模块差异与功能细分

• XVME-956 系列
  • 功能扩展：通过子卡（如 XVME-956/101、XVME-956/400）支持内存扩展、串行/并行通信、SCSI 主机适配等功能。
  • 存储集成：可配置为包含 IDE 硬盘和 1.44MB 软驱的存储子系统（如 XVME-957），适合需要本地存储的场景。
• XVME-675
  • 处理器模块：作为计算核心，与 XVME-956 的 I/O 扩展功能互补，共同构建完整系统。

  • 兼容性：支持与 XVME-956 系列模块协同工作，形成混合架构（如计算+存储+通信）。

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技术优势

1. 高可靠性
   • VMEbus 的冗余设计和抗干扰能力，适合工业环境长期运行。
   • 模块化设计便于维护和升级，降低系统停机风险。
2. 生态支持
   • Xycom（现属 Emerson）提供完整的 VMEbus 产品线，包括处理器、I/O、通信模块，简化系统集成。
   • 支持多种操作系统（如 VxWorks、Linux），满足不同应用需求。

典型应用案例

• 工业控制：在化工生产线中，XVME-675 处理实时控制逻辑，XVME-956/411 扩展以太网通信，实现远程监控。
• 数据采集：XVME-675 运行数据采集软件，XVME-956/400 连接多串口模块，同步采集传感器数据。

• 军事仿真：模块化设计便于快速配置仿真系统，支持实时数据处理与显示。

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Xycom XVME-675 and XVME-956 are PC/AT modules based on the VMEbus architecture, both using 100MHz Intel processors and equipped with 1MB VRAM

Core Features

Processor and Performance

Equipped with a 100MHz Intel processor (such as Intel 80486DX4), it provides mainstream computing power at the time and is suitable for industrial control, data acquisition, and other scenarios.

1MB VRAM supports basic graphics display requirements and can be connected to VGA displays to meet human-machine interface (HMI) or simple monitoring tasks.

Interface and Scalability

Standard VMEbus interface: Supports 6U slots, compatible with VMEbus backboards, and can seamlessly integrate with other VME modules such as I/O and communication modules.

PC/AT compatibility: Provides PS/2 keyboard/mouse interface, parallel port, serial port (RS-232), BNC (10BASE2), and RJ45 (10BASE-T) network interfaces, supporting traditional PC peripherals.

SCSI interface: The 50 pin SCSI interface can be used to connect external storage devices (such as hard drives, tape drives) and expand data storage capabilities.

Application scenarios

Industrial automation: As the control core of PLC or DCS systems, it processes real-time data and drives HMI.

Test measurement: Responsible for signal processing and storage in the data acquisition system.

Military and Aerospace: Used for embedded systems that require high reliability and modular design.

Module differences and functional segmentation

XVME-956 series

Function expansion: Support memory expansion, serial/parallel communication, SCSI host adaptation, and other functions through daughter cards (such as XVME-956/101, XVME-956/400).

Storage integration: It can be configured as a storage subsystem that includes IDE hard drives and 1.44MB floppy drives (such as XVME-957), suitable for scenarios that require local storage.

XVME-675

Processor module: As the computing core, it complements the I/O expansion function of XVME-956 to jointly build a complete system.

Compatibility: Supports collaboration with XVME-956 series modules to form a hybrid architecture (such as computing+storage+communication).

technical advantage

high reliability

The redundant design and anti-interference capability of VMEbus are suitable for long-term operation in industrial environments.

Modular design facilitates maintenance and upgrades, reducing the risk of system downtime.

Ecological support

Xycom (now Emerson) offers a complete line of VMEbus products, including processors I/O、 Communication module simplifies system integration.

Supports multiple operating systems (such as VxWorks, Linux) to meet different application requirements.

Typical application cases

Industrial control: In chemical production lines, XVME-675 handles real-time control logic, while XVME-956/411 extends Ethernet communication to achieve remote monitoring.

Data collection: XVME-675 runs data collection software, XVME-956/400 connects multiple serial port modules, and synchronously collects sensor data.

Military simulation: Modular design facilitates quick configuration of simulation systems and supports real-time data processing and display.