XYCOM 70674‑098 (XVME‑674) Detailed Product Description

I. Product Overview

XYCOM 70674‑098 (XVME‑674) is a 6U single-slot VMEbus PC/AT compatible industrial-grade CPU module launched by XYCOM (now part of Artisan Technology Group). It is equipped with an Intel 80486DX/DX2 processor and integrates VGA display, IDE storage, serial and parallel ports, and complete VME bus master control capabilities. It is specifically designed for industrial automation, embedded measurement and control, data processing, and applications in harsh environments using x86 architecture. The model "70674‑098" is a customized configuration version, with the core being XVME‑674. It emphasizes high integration, strong compatibility, and industrial reliability. It can operate independently or serve as the main control node of a VME system, suitable for mid-to-high-end industrial control and embedded computing scenarios. 

II. Hardware Architecture and Mechanical Characteristics

Form Specification: Standard 6U single-width (Single‑Width) VMEbus size (165.1 mm × 200.02 mm), in accordance with IEEE 1014 standard, single-slot installation, compatible with all standard VME enclosures and backplanes, compact structure and easy installation.

PCB and Structure: Industrial-grade multi-layer reinforced PCB, with onboard 486 CPU, DRAM array, VGA controller, IDE/FDD interface, VME bus interface, serial/parallel port controller, power management, watchdog circuit, EMI filter components; enhanced anti-vibration and anti-shock design, capable of withstanding mechanical stress in industrial environments, suitable for wide temperature conditions.

Front Panel Connectors: Integrated 2 channels DB9 RS‑232 serial ports, 1 channel DB25 parallel port, VGA video output, IDE interface, floppy drive interface, reset button, 4 channels LED status indicators; backplane realizes bus communication and expansion I/O through VME P1/P2 connectors, wiring is standardized and shielding is good.

Status Indicators: Onboard power, operation (CPU), fault (FAIL), watchdog (WDT) LED indicators, supporting power-on self-test (POST) and real-time monitoring of operation status, facilitating rapid diagnosis and maintenance in the field.

III. Core Processor and Memory Configuration

Main Processor: Intel 80486DX (33 MHz) or 80486DX2 (66 MHz, overclocked), 32-bit x86 architecture, 8KB first-level cache, supports real mode and protected mode, compatible with PC/AT instruction set, powerful computing performance, suitable for industrial control, data processing and embedded operating systems.

Memory Configuration:

DRAM: Onboard 4MB/16MB/32MB high-speed DRAM (70674‑098 default 32MB), zero wait access, supports memory parity check, ensuring data reliability, suitable for large programs and high-speed data cache.

BIOS/Firmware: Onboard EPROM/Flash, stores system BIOS and boot program, supports on-site firmware upgrade, compatible with standard PC/AT firmware system.

No L2 cache, basic configuration is simple and reliable, balancing performance and cost, suitable for scenarios prioritizing industrial real-time and stability.

IV. VME Bus Interface and System Expansion

Bus Standard: Compatible with VMEbus A16/A24/A32 addressing, D08/D16/D32 data transmission, supports master/slave mode, bus arbitration, interrupts (levels 1–7) and VME interrupt generation (triggered by local CPU for any level VME interrupt), suitable for complex systems with multi-board card collaboration.

Address Space: Supports 4GB A32 address range, accessible to all VME bus slave devices, compatible with XVME‑500/530/560/590/600/630 series I/O modules, strong expansion capability.

Bus Function: Integrated system clock (SYSCLK), system reset (SYSRESET), single-level arbitrator, bus timer, IACK daisy chain driver, meeting the complete VME system management requirements.

V. I/O Interfaces and Peripheral Support

Serial Ports: 2 channels RS‑232C (DB9), baud rate 50–115.2kbps, driven by standard UART controller, suitable for serial port sensors, HMI, debugging terminal and communication with external devices. Parallel Port: 1 DB25 parallel port, compatible with IEEE 1284, supporting printers, parallel port devices and high-speed data transmission.

Graphics Display: Integrated VGA controller, supporting standard VGA video output (640×480@60Hz), compatible with displays and industrial touch screens, meeting local display and operation requirements.

Storage Interface:

IDE Controller: Supports IDE hard drives and CD-ROM drives, can expand large-capacity local storage, compatible with data recording and operating system installation.

Floppy Disk Controller: Supports 3.5-inch floppy drives, used for firmware upgrade and data backup.

Real-time Clock (RTC): Battery-backed RTC, retains time and date in case of power failure, ensuring system time synchronization and accuracy of event recording.

Six. Electrical Characteristics and Operating Environment

Power Supply: VME bus + 5V/±12V power supply, typical power consumption 3.5A (+5V), no need for external auxiliary power supply, simplifying system wiring and power configuration.

Operating Temperature: Standard 0 ℃ to + 60 ℃; optional -40 ℃ to + 85 ℃ wide temperature version, compatible with industrial, vehicle, military, aerospace and other harsh environments.

Storage Temperature: -40 ℃ to + 85 ℃, reliable for long-term storage.

Humidity: 5%–95% RH (no condensation), tolerant to humid and dusty conditions.

Vibration / Shock: 5–2000 Hz, 0.015" displacement, meets MIL-STD-810 standard, excellent vibration and shock resistance, suitable for high mechanical stress scenarios.

Electromagnetic Compatibility: Complies with IEC 61000-6-2/4 industrial EMC standards, strong anti-static, anti-pulse group, anti-surge capabilities, suitable for strong electromagnetic interference environments.

Seven. Core Functions and Software Support

Operating System Compatibility: Supports MS-DOS, Windows 3.x/95, Linux, VxWorks, QNX and custom RTOS, compatible with standard PC/AT drivers and applications, mature development ecosystem.

Hardware Watchdog (WDT): Programmable timeout time (1–255 seconds), automatically resets when system is abnormal, ensuring long-term operational stability.

Power-On Self-Test (POST): Automatically executes CPU, memory, interface and bus detection upon startup, displays results via LED, quickly locating hardware faults.

Interrupt Handling: Supports VMEbus interrupts, local serial port/parallel port interrupts and timer interrupts, improving I/O response speed and system real-time performance.

Software Development Support: Provides standard PC/AT BIOS, drivers and C language development libraries, supports user secondary development, compatible with customized control logic.

Eight. Typical Application Scenarios

Industrial Process Control: As the main controller of VME system, drives analog/digital I/O modules, realizes closed-loop control of temperature, pressure, flow and other process parameters, compatible with x86 industrial software.

Embedded Measurement and Control Platform: In harsh environments such as military, vehicle, rail transit, aerospace, etc., embedded control, status monitoring and data recording.

Data Acquisition and Processing: Combined with XVME-500 series high-speed analog input module, completes multi-channel high-speed data acquisition, processing, storage and local display.

Automation Equipment Control: Semiconductor equipment, testing instruments, robot controllers, provide x86 architecture real-time computing, I/O control and graphic display core.

Industrial Human-Machine Interface (HMI): Integrates VGA display and serial/parallel ports, as the core of embedded HMI, realizes on-site data visualization and operation control.

Nine. Product Advantages X86 ecosystem compatibility: 486 processor + PC/AT architecture, compatible with a vast range of industrial software and drivers, easy development, low maintenance cost.

High integration design: single slot integrates CPU, memory, VGA, IDE, serial/parallel ports and VME bus, comprehensive functions, saves chassis space.

Large-capacity memory and storage: up to 32MB DRAM + IDE interface, suitable for large programs, high-speed data cache and local storage requirements.

Industrial-grade reliability: reinforced design, wide temperature operation, hardware watchdog, EMC compliance, stable long-term operation, suitable for harsh industrial environments.

Complete VME control capability: master/slave mode, bus arbitration, interrupt generation, system management functions are all complete, single card builds a complete VME system.