RCR_DIS_CRC
u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
u8 rcr = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
db->rctl.rcr_all = RCR_DIS_LONG | RCR_DIS_CRC | RCR_RXEN;
#define RCR_RX_DISABLE (RCR_DIS_LONG | RCR_DIS_CRC)
u8 rx_ctl = RCR_RXEN | RCR_DIS_CRC | RCR_DIS_LONG;