SBMC
if ((sist & SBMC) && ncr_int_sbmc (np))
if (!(sist & (SBMC|PAR)) && !(dstat & SSI)) {
OUTONW(np, nc_sien, SBMC);
if (!(sist & (STO|GEN|HTH|SGE|UDC|SBMC|RST)) &&
if (sist & SBMC) sym_int_sbmc(shost);