ISR_RWM
#define ISR_ALL (ISR_RWM | ISR_ACKNAK | ISR_UB | ISR_IBB \
if (rv & ISR_RWM) {
rv &= (ISR_ITE | ISR_ACKNAK | ISR_RWM);
rv &= (ISR_ITE | ISR_ACKNAK | ISR_RWM);
rv &= (ISR_IRF | ISR_ACKNAK | ISR_RWM);
if (isr & ISR_RWM)