AIC_ISA_IOSIZE
if (bus_space_map(iot, ia->ia_io[0].ir_addr, AIC_ISA_IOSIZE, 0, &ioh))
bus_space_unmap(iot, ioh, AIC_ISA_IOSIZE);
ia->ia_io[0].ir_size = AIC_ISA_IOSIZE;
if (bus_space_map(iot, ia->ia_io[0].ir_addr, AIC_ISA_IOSIZE, 0, &ioh)) {