RNR
enquiry_cr(l2, RNR, RSP, 1);
enquiry_cr(l2, RNR, CMD, 1);
typ = RNR;
} else if ((l2->va != nr) || (typ == RNR)) {
enquiry_cr(l2, RNR, RSP, 0);
data[0] == RNR : (data[0] & 0xf) == RNR;
sca_out(0x0F, msci + RNR, card); /* +1=RX DMA activation condition */
case RNR: