Structs starting with `i' in arch/i386/isa

• interrupt_decode arch/i386/isa/if_wereg.h:124
• isa_device arch/i386/isa/isa_device.h:54
• isa_driver arch/i386/isa/isa_device.h:75
• is_softc arch/i386/isa/if_is.c:97