BUSMON_SEL
if ((phase & BUSMON_BSY) || (phase & BUSMON_SEL)) {
#define BUSMON_RESELECT ( BUSMON_IO | BUSMON_SEL)
#define BUSMON_PHASE_MASK ( BUSMON_MSG | BUSMON_IO | BUSMON_CD | BUSMON_SEL)
#define BUSPHASE_SELECT ( BUSMON_SEL | BUSMON_IO )
nsp_negate_signal(SCpnt, BUSMON_SEL, "reselect<SEL>");