cpr16
cpr8(Cmd), cpr16(CpCmd),
cpr16(IntrStatus), cpr16(IntrMask));
cp->tx_head, cp->tx_tail, cpr16(TxDmaOkLowDesc));
mask = cpr16(IntrMask);
status = cpr16(IntrStatus);
status, cpr8(Cmd), cpr16(CpCmd));
cpw16(IntrStatus, ~(cpr16(IntrStatus)));
cpw16_f(IntrStatus, ~(cpr16(IntrStatus)));