Interrupt Processing
1.6 Interrupt Processing
A circuitry on the VME-ASIO16 connects the interrupt requests of all
DUARTs with a common IRQ and coordinates the arbitration. At this,
priorities are assigned to the single DUARTs, so that simultaneously
occurring interrupts are processed with respect to their priority.
Each interrupt request of DUARTs is indicated by LEDs (green). So at
a failure the user can recognize, at which IRQ no service ensues via
the VMEbus.
The VMEbus interrupt level can be selected via jumper BR4. Factory-
set at the VME-ASIO16 is ’IRQ4’.
The LED ’IRQ’ at the front panel indicates, that at least one of the
interrupt outputs of the DUARTs is active.
The LEDs 1/2, 3/4, 5/6, and so on indicate the active condition of
the interrupt signal of the single DUARTs 68681.
(see also chapter ’Front Panel’)
VME-ASIO16 Rev. 1.7
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