PRO_PSS
(void)PRREAD(sc, PRX(chp->ch_channel, PRO_PSS));
pss = PRREAD(sc, PRX(chp->ch_channel, PRO_PSS));
pss = PRREAD(sc, PRX(chp->ch_channel, PRO_PSS));
(void)PRREAD(sc, PRX(chp->ch_channel, PRO_PSS));
if ((PRREAD(sc, PRX(chp->ch_channel, PRO_PSS)) &
PRREAD(sc, PRX(chp->ch_channel, PRO_PSS)),