S0_ECHK
((*csb->csb_rslt & S0_ECHK) && arg < 0) ||
if ((*senser & (S0_IVCMD | S0_SEKEND | S0_ECHK)) != S0_SEKEND)
(S0_ICMASK | S0_SEKEND | S0_ECHK | S0_NOTRDY))) != 0) {
(S0_ICMASK | S0_SEKEND | S0_ECHK | S0_NOTRDY))) != 0)
(S0_ICMASK | S0_SEKEND | S0_ECHK | S0_NOTRDY))) != 0)
(S0_ICMASK | S0_ECHK | S0_NOTRDY))) != 0)
(S0_ICMASK | S0_ECHK | S0_NOTRDY);