PCIBusCfg 258 drivers/net/ethernet/dec/tulip/winbond-840.c PCIBusCfg=0x00, TxStartDemand=0x04, RxStartDemand=0x08, PCIBusCfg 266 drivers/net/ethernet/natsemi/natsemi.c PCIBusCfg = 0x0C,