SIBA_CFG0_INTVEC
sbintvec = bhndb_pci_read_core(sc, SB0_REG_ABS(SIBA_CFG0_INTVEC), 4);
bhndb_pci_write_core(sc, SB0_REG_ABS(SIBA_CFG0_INTVEC), sbintvec, 4);