CPS 1 (Ramm)			Spring 1995		     22 March 1995
				 Quiz #8
Name _______________________					Section _____

A. Add the following binary numbers and give their sum in binary:
					 			   1 0 1 1
							         + 1 0 1 0
								   -------
B. Complete the truth table for the circuit shown below:

	Q   R	S	L
      --------------------
	0   0	0
		     -----
	0   0	1
		     -----
	0   1	0
		     -----
	0   1	1		( !! SEE SEPARATE FIGURE !! )
		     -----
	1   0	0
		     -----
	1   0	1
		     -----
	1   1	0
		     -----
	1   1	1
		     -----
C. Give the logical expression for the circuit shown in B. above.




D. Do a trace for the program shown below left using the column headings
shown below center.  Assume that the user enters a 15, then a 23, and then
a 0 when input is requested.
			 | #   CF   AX  DATA  SUM   |  #   CF   AX  DATA  SUM
			 |			    |
0	copy	ax, #c0	 |			    |
			 |			    |
1	copy	sum, ax	 |			    |
			 |			    |
2	in	ax	 |			    |
			 |			    |
3	copy	data, ax |			    |
			 |			    |
4 #L0	copy	ax, #c0	 |			    |
			 |			    |
5	cmp	ax, data |			    |
			 |			    |
6	jnb	#L1	 |			    |
			 |			    |
7	copy	ax, sum	 |			    |
			 |			    |
8	add	ax, data |			    |
			 |			    |
9	copy	sum, ax	 |			    |
			 |			    |
10	in	ax	 |			    |
			 |			    |
11	copy	data, ax |			    |
			 |			    |
12	jmp	#L0	 |			    |
			 |			    |
13 #L1	copy	ax, sum	 |			    |
			 |			    |
14	out	ax	 |			    |
			 |			    |
#c0	0		 |			    |
sum	0					    
data	0		CONTINUE IN RIGHT COLUMN ABOVE