D8390_ISR_RDC
outb(D8390_ISR_RDC, eth_nic_base + D8390_P0_ISR);
(inb(eth_nic_base + D8390_P0_ISR) & D8390_ISR_RDC)
!= D8390_ISR_RDC;
while((inb(eth_nic_base + D8390_P0_ISR) & D8390_ISR_RDC)
!= D8390_ISR_RDC);