RADISYS SBC486DX66 Embedded Single Board Computer

I. Basic Information
Brand: RADISYS (formerly Intel Industrial Control Division, under VMIC)
Model: SBC486DX66
Hardware Architecture: VME/MultiBus II (IEEE P959) 3U/6U industrial standard embedded single-board computer
Compatible Systems: GE Mark VI/Mark VIe turbine and gas turbine TCS control systems. It is often used in combination with the VMIACC-5595-208 reflective memory hub you previously queried as the main control board for the reflective memory network node. Processor
Intel i486DX66, with a clock speed of 66MHz, has a built-in hardware floating-point unit (FPU), an 8KB level 1 cache, an 32-bit computing architecture, and is specifically designed for industrial real-time control.
Memory Configuration
The board is equipped with standard DRAM of 8MB to 32MB. It supports SIMM memory slots, which can be expanded up to 256MB. Optional ECC memory error checking is available to prevent memory data errors caused by industrial environment electromagnetic interference.
Bus Specifications
MultiBus II industrial parallel bus, peak transmission rate of 40MB/s, strong drive, high anti-interference, supports multi industrial control board card rack parallel expansion networking.
Board-mounted Peripheral Interfaces
2 RS232 serial ports (for debugging and peripheral communication)
1 LPT parallel printing port
Integrated VGA display interface, PS/2 keyboard and mouse interface
IDE hard disk / CF card storage interface for solid-state storage of operating systems and control programs
Optional board-mounted 10/100M Ethernet, SCSI interface, VMIC reflective memory network card slot
Power Supply and Environment
Power supply: standard industrial computer rack + 5V DC power supply
Operating temperature: -20℃ ~ +70℃ (industrial wide temperature range)
Storage temperature: -40℃ ~ +85℃
Resistant to vibration, anti-EMC industrial electromagnetic interference, suitable for harsh conditions in power stations, oil and gas sites

Operating Systems Supported
MS-DOS, FreeDOS
VxWorks real-time embedded operating system (mainstream system for GE turbine units)
Windows 3.1, early embedded systems for Windows 95

Core Function Usage
GE TCS unit reflective memory network node main control
Equipped with VMIC5565 reflective memory network card, connected to VMIACC-5595-208 optical fiber hub, achieving hardware-level ultra-low latency real-time data sharing between multiple control cabinets, completing high-precision closed-loop control such as turbine speed regulation, valve control, and interlock protection.
Local data acquisition, logical operation, fault diagnosis, undertaking local control computing tasks for the Mark VI system.
As an operator station, data gateway, fault recording upper control board for old-fashioned thermal power plants, combined-cycle power plants, gas/steam turbine generator units.
Main control computing unit for aerospace, semi-physical simulation, military distributed real-time simulation systems.

Core Product Features
Industrial-grade long-life stable design, high deterministic instruction execution, no modern operating system background scheduling jitter, meeting the millisecond-level safety interlock requirements of the unit.
Native compatibility with VMIC full series reflective memory cards, is the standard main control board for GE Mark VI initial control system.
Modular rack hot-swappable installation, supports hardware self-diagnosis, memory parity check, and bus fault alarm.
Currently, it belongs to industrial control retired spare parts, mostly used for replacing spare parts of old power plant units and system renovation and maintenance.

Typical Supporting Hardware
VMI5565 reflective memory optical fiber network card
VMIACC-5595-208 8-port reflective memory hub
IDE solid-state electronic disk, industrial CF card (replacing old-fashioned mechanical hard drives)