Interrupts
The card can generate and acknowledge interrupts on any one of VMEbus interrupt lines 1 through 7 (or none). The interrupt level is selected by positions 8 through 10 of switch S1, as detailed below:
The card interrupter is a ROAK (release-on-acknowledge) type. The interrupt request is removed from the VMEbus when the card responds to an interrupt acknowledge. However, the Card-IRQ bit in the Control register remains set until cleared by the host.
Default Switch Settings
The card is shipped with all switches ON. This corresponds to:
• Short I/O address 0000
• Supervisory and non-privileged access permitted
• Interrupts disabled
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