Abaco Systems / VMIC VMIVME-5010-000 Interrupt Expander Board

The Abaco Systems / VMIC VMIVME-5010-000 is an Interrupt Expander Board that augments interrupt handling and signal distribution within VMEbus systems. It provides eight global interrupt channels and eight external interrupt inputs with programmable edge selection, enabling precise timing and interrupt management for high-performance embedded and industrial computing applications.

– Technical Specifications

• Eight global interrupt channels
• Eight external interrupt inputs accessible via front panel
• Programmable edge select for external interrupt inputs
• Optional software-controlled interrupt generation
• 8-bit data transfers (D0–D7)
• A16 and D8 VMEbus addressing modes supported
• Triple 16-bit programmable timer/counter (Intel 8254)
• Timer/Counter Registers located at board addresses $0020 to $0026
• Interval Timer Register TR0 driven by 6.25 MHz clock
• Interval Timer Register TR1 driven by TR0 output
• Data Counter Register (DCR) for independent buffer monitoring
• Timer Control Register (TCR) for mode and transfer management

– Key Features

• Efficient interrupt signal management and distribution
• Independent interval timing and data counting capability
• Multiple timer/counter operating modes via TCR configuration
• Front-panel accessibility for external interrupt connections

– Typical Applications

The VMIVME-5010-000 serves systems requiring coordinated multi-channel interrupt handling, precision interval timing, and data-rate monitoring within VME-based platforms.

– Compatibility & Integration

The board integrates into VMEbus architecture and requires installation within a VMEbus 6U chassis. It supports standard A16 and D8 addressing and data transfer protocols defined by the VMEbus specification.