Associating Interrupt to Driver

The association between an interrupt and the driver is established in different ways depending on the hardware.

The VECTOR statement establishes the interrupt level and the associated driver for devices on the EISA and VME busses.
For some VME devices, the interrupt level is established dynamically using vme_ivec_set() (see Chapter 14, "Services for VME Drivers").
The interrupt vector for a device on the GIO bus is set dynamically, by calling setgiovector() from the pfxinit() entry point (see Chapter 18, "GIO Device Drivers").
For devices on the SCSI bus, all interrupts are handled by a single, low-level driver which notifies a callback function (see Chapter 15, "SCSI Device Drivers").