The Abaco Systems/Ramix PMC677TX is a quad-port Gigabit Ethernet interface module in PMC form factor, delivering four independent 10/100/1000BaseT connections with full-duplex operation on each channel. Built around Intel 82546 Ethernet MACs and an IBM21P100 PCI bridge, the card integrates dedicated DMA engines and 64KB deep FIFO buffers per port to sustain full 1000Mbit bandwidth with minimal host CPU overhead. Advanced hardware offloading capabilities include packet filtering based on checksum errors, SNMP and RMON statistics collection, and TCP checksum computation in silicon. The PMC677TX supports jumbo frames and flexible address filtering: 16 exact-match slots for unicast or multicast, a 4096-bit hash filter for multicast frames, and promiscuous modes. Two units can be direct-cabled via crossover to establish dedicated 1000Mbit full-duplex links between systems. The module plugs into PCI-X or standard PCI 64-bit/66MHz slots with 3.3V signaling and operates with RJ-45 copper transceivers. Device drivers are supplied for VxWorks, Linux, LynxOS, Windows NT, and Solaris environments. Optional polyurethane or acrylic conformal coating and RoHS-compliant variants are available.

Technical Specifications

• Ethernet Ports: Four 10/100/1000BaseT interfaces with RJ-45 connectors
• Transceiver Type: Pluggable copper transceivers
• Duplex Mode: Full duplex on all channels
• Maximum Bandwidth: 1000Mbit per port
• DMA Engine: One per port
• FIFO Buffer Depth: 64KB per port
• PCI Interface: PCI-X or PCI 64-bit/66MHz at 3.3V signaling
• PCI Bridge Chipset: IBM21P100
• Ethernet MAC: Intel 82546
• Jumbo Frame Support: Yes
• Form Factor: PMC single slot

– Key Features

• Hardware TCP checksum offloading reduces CPU load
• 16 exact-match address filters for unicast and multicast frames
• 4096-bit hash filter for multicast frame selection
• Promiscuous unicast and multicast filtering modes
• SNMP and RMON statistics counters
• Packet filtering based on checksum error detection
• Back-to-back crossover connection capability for dedicated inter-board links

– Typical Applications

• Real-time deterministic networking in embedded systems
• High-performance data acquisition and telemetry
• Low-latency inter-module communication in multi-processor architectures
• Industrial and military embedded network interfaces

– Compatibility & Integration

• Operates in legacy PCI and modern PCI-X slots
• Driver support: VxWorks, Linux, LynxOS, Windows NT, Solaris
• Optional conformal coating (polyurethane or acrylic)
• RoHS-compliant versions available with –CC suffix designation