Instructions
Implement a 1-bit ALU whose operations are
sum,and,or,xor
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Click on components on the left side to add them to the
circuit board.
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Drag and drop components to move them around, connect them
using wires by dragging your cursor from one endpoint to
another.
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You can delete components by right clicking on them and
selecting the delete option.
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You can set the input bits, which are by default 1, to any
values of your choice for testing, by clicking on them. Each
click toggles the bit between 1 and 0.
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A single output point can drive several inputs: drag a new
wire from an output point that is already connected to
connect it to another component. A wire can be dragged from
an output point to an input point, or the other way round.
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To delete a wire, right click on it and select the delete
option.
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Click on the "Simulate" button after setting the input bits as
per your choice. This will simulate the circuit you built for
the input bits set and will change the output bit values
accordingly, for you to test your circuit.
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Click on the "Submit" button to submit the circuit once you
think you have built the required circuit.
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Clicking on "Submit" will display a "Success" or "Failure"
message in the Observations Section according to the
correctness of your circuit. It will also display a Truth
Table verifying your circuit for all the combinations of the
inputs. The truth table is shown only when every component
is connected. Cout is checked only when the addition is
selected (S1S0 = 00), so it is shown as x for the other
operations.
Here S1,S0 are select lines with S1 being MSB and S0 being
LSB.