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

• interrupt_decode arch/i386/isa/if_wereg.h:125
• isa_device arch/i386/isa/isa_device.h:44
• isa_driver arch/i386/isa/isa_device.h:66
• is_softc arch/i386/isa/if_is.c:79