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In conventional network subsystem implementations, the network interfaces generate a hardware interrupt to signal the completion of a packet reception or transmission.
Our first set of experiments is designed to determine the base overheads of hardware interrupt timers and soft timers.
This is intuitive because the calls to the handler execute with the overhead of a procedure call, whereas a hardware interrupt involves saving and restoring the CPU state.
The PHAST-1 also provides alarm detection and AIS generation, as well as software and hardware interrupts in the event of errors.
Support of triggered and enabled subsystems through external hardware interrupts --Intuitive dialogs for easy configuration of interrupts and task priorities --Automatic code generation for I/O drivers --Multiprocessor support (optional)
The adapters also feature eight selectable hardware interrupts (IRQs) and are shipped with diagnostic software.

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