PSS_CONTROL       587 dev/isa/pss.c      outw(pss_base+PSS_CONTROL, PSS_RESET);
PSS_CONTROL       590 dev/isa/pss.c  	inw(pss_base+PSS_CONTROL);
PSS_CONTROL       592 dev/isa/pss.c      outw(pss_base+PSS_CONTROL, 0);