pg 11.



	IC0     ----+
		    |		       
		    +----------- X ----+
		    |	      	       |
	zero    ----+	       	       |
	detect      		       |
				       |
				       |
				       |
				       |
	IC1 ---------------+	       |
			   |	       |
 			   +---- X ----+
		           |	       |
	zero    ---- X ----+	       |
	detect    		       |  
				       |
				       |
				       +---- X ---+----  transfr dat val
				       |          |	    to IP
	IC2   -------------+	       |          |
			   |  	       |          |
 			   +---- X ----+          |
		           |	       |          |
	R1.31 -------------+	       |          |
				       |          |
				       |          |
				       |          |
                                       |          |
	IC3   -------------+           |          |
			   |           |          |
 			   +---- X ----+          |
		           |           |          |
	R1.31 ----- X -----+           |          |
				       |          |
				       |	  |   
				       |          |
				       |          |
	IC4   ------------------ X ----+          |
          					  |
          					  |
          					  |
          					  |
	IC5   ------------------------------------+





R1.31 top bit of r.1


IC3 ins. cde.

	
	


	

