public void subb_ix()
    {
        int	  t,r;
    	fetch_effective_address();
    	t = RM(ea);
    	r = m6809.b - t & 0xFFFF;
    	CLR_NZVC();
   	SET_FLAGS8(m6809.b,t,r);
    	m6809.b = r & 0xFF;
        if(m6809log!=null) fprintf(m6809log,"M6809#%d subb_ix :PC:%d,PPC:%d,A:%d,B:%d,D:%d,DP:%d,U:%d,S:%d,X:%d,Y:%d,CC:%d,EA:%d\n", cpu_getactivecpu(),m6809.pc,m6809.ppc,m6809.a,m6809.b,getDreg(),m6809.dp,m6809.u,m6809.s,m6809.x,m6809.y,m6809.cc,ea);
  
    }