C_OPEN_1
n = i + ((flags & C_OPEN_1) != 0);
if ((flags & C_OPEN_1) &&
clearcombo(tcbp, cbp->c_flags & C_OPEN_1);
ncbp->c_flags |= C_OPEN_1;
ncbp->c_flags = ocb.c.b ? C_OPEN_1 : 0;
i = (flags & C_OPEN_1) ? 6 : 5;