The Radisys EPC-8 is a VMEbus-based embedded computer integrating Intel 486 processing with full 32-bit VMEbus master capabilities. It delivers PC-compatible computing with workstation-level performance in single or dual-slot configurations, supporting both networked and standalone deployments through on-board Ethernet and comprehensive I/O.
– Technical Specifications
Processor & Memory
• Intel 486 microprocessor: DX2-50 MHz, DX2-66 MHz, or DX4-100 MHz options with on-chip math coprocessor and four-way set associative cache
• DRAM: 4 MB, 8 MB, 16 MB, or 32 MB standard configurations via 64-bit local bus with zero-wait-state performance
• SRAM: Optional 128 KB memory-mapped, battery-backed
• Flash Memory: Optional 2 MB for boot and write-protected operation
• BIOS: Phoenix BIOS with RadiSys VMEbus enhancements
Video & Display
• Cirrus Logic CL-GD5428 Super VGA controller with 512 KB video DRAM
• Resolutions: 640 × 480 (16/256 colors), 800 × 600 (16/256 colors), 1024 × 768 (16 colors)
• DB15 female front-panel connector
Networking
• National Semiconductor AT/LANTIC-based 10Base-T Ethernet, NE2000/NE2000+/Western Digital compatible
• 10Base-T front-panel connector
Expansion
• VMEbus: Full 32-bit master A32/A24/A16:D32/D16/D08 addressing, all seven interrupt levels, slot-1 controller with four-level priority arbitration, memory-locking support
• EXM: 16-bit PC/AT-compatible local expansion bus; dual-slot version supports two EXM modules
– Key Features
• High-performance local bus architecture isolates PC memory from VMEbus traffic
• Dual-slot option with integrated EXM expansion without VMEbus interference
• RS-232 (COM1, 9-pin), RS-422/485 (COM2) serial ports supporting multidrop
• Standard PC/AT parallel printer port (LPT1, 25-pin)
• IBM PS/2-style keyboard interface (6-pin mini-DIN)
• PC/AT speaker audio output
– Typical Applications
Industrial control, data acquisition, networked test systems, and embedded applications requiring VMEbus integration with PC-class computing resources.
– Compatibility & Integration
Full VME slot-1 controller functionality enables deployment in standard VMEbus crates. NE2000-class Ethernet compatibility supports legacy network drivers. Phoenix BIOS environment accommodates multiple operating systems.























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