AE Lab 7.3


1.  Logg-O to build one-bit half adder3 using AND, OR, and NOT gates,
as described in figure 7.7 of your text. Test it using all possible
combinations of inputs. 

DONE-Dan Works   8-1-99

2. Use Logg-O's "Save as..." button to save your circuit in a file 
named "halfadd.dat" 

DONE-Dan Works   8-1-99

3. Add to your half adder circuit the gates and connections necessary
to implement a one-bit full adder, as depicted in figure 7.8 in your 
text. After testing your full adder, save it as "fulladd.dat". 

DONE-Dan Works   8-1-99

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AE Lab 7.4

1. Figure 7.16 in your text shows a latch circuit. Use Logg-O to build
your own latch circuit. Test it out to see that it performs as described
in text. Then, save your circuit as file "latch.dat". 


DONE-Dan Works   8-1-99


2. Figure 7.18 shows how a latch (the "black box" just left to the center
of the diagram) can be connected to other Logg-O built-ins to produce a
one-bit memory cell. Extend your latch circuit to implement this memory. 


DONE-Dan Works   8-1-99

3. Once you are convinced that your memory circuit performs as it should,
save it in a file named "memory.dat". 


DONE-Dan Works   8-1-99

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AE Lab 7.5

Steps 1-6, DONE-Dan Works   8-1-99

Step 7:

As the program is started it loads the instruction at address 0.  In 
our example it is LOD # 3, which says load the number 3. Numerical
value 3 is loaded in the IR section.  The decoder interprets the
proper operation to be performed on the instruction and the 
multiplexer sends that operation and the actual value (if any) to the 
ALU.  The ALU performs the calculation and deposits the sum or product
in the ACC.  At this point the program jumps to the next address for
its subsequent operation.

Dan Works   8-1-99