The Abaco Systems / SBS / Bit 3 82002065 is a VMEbus-to-VMEbus adapter that bridges two independent VMEbus systems, enabling unified resource sharing and expanded computing capacity. The adapter supports A24 addressing and D8/D16/D32 data transfer modes, facilitating random access reads and writes between connected chassis while maintaining interface integrity through parity checks on address, control, and data lines.
Technical Specifications
• Model: 82002065 (411 Series)
• Addressing Mode: A24 (16 Mbyte addressing space)
• Data Transfer Modes: D8, D16, D32
• Shared Memory Capacity: Up to 8 MB via optional Dual Port RAM Cards
• Inter-System Communication: Random access reads/writes, memory mapping, interrupt exchange
• VMEbus Controller Function: Model 411 provides level 3 bus arbitration, system clock, and system reset
• Data Integrity: Parity checks on address, control, and data lines
• Physical Weight: 10 lbs/ea
– Key Features
• Flexible configuration modes: Transmitter/Receiver or Transmitter/Transmitter
• Transmitter/Receiver setup allows one adapter to function as slave with memory references passed to secondary chassis
• Transmitter/Transmitter configuration enables both systems as bus masters, eliminating intermediate software driver requirements for basic communication
• VMEbus system controller capability reduces need for separate controller hardware when used as expansion chassis
• Supports interrupt exchange between systems for enhanced inter-chassis coordination
– Typical Applications
• Multi-chassis VMEbus system expansion
• Real-time computing environments requiring distributed processing
• High-capacity memory configurations across multiple VMEbus platforms
• Systems requiring transparent inter-chassis resource sharing
– Compatibility & Integration
Fully compliant with VMEbus standards. Supports A16/A24 addressing modes and D8/D16/D32 data transfer rates. Compatible with multiprocessing and interrupt capabilities inherent to VMEbus architecture. PCB part number 82002040.
