BMU_IRQ_EOF
control |= BMU_EOF | BMU_IRQ_EOF;
tf->control |= BMU_EOF | BMU_IRQ_EOF;
rd->control = BMU_OWN | BMU_STF | BMU_IRQ_EOF | BMU_TCP_CHECK | bufsize;
rd->control = BMU_OWN | BMU_STF | BMU_IRQ_EOF | BMU_TCP_CHECK | size;