Binary Logic Simulation Blocks

[ray joseph]

I would like to use Scicos for binary logic design.  To facilitate such designs, there are three items I could use help on:

1)  There is a logic function which allows a truth table to define its operation.  I can make this, for example, an AND gate or an OR gate.  Is there a way that I can change the icon so it will be easy to tell which type of gate I am working with?  It would be sufficent to add a label affixed to the icon (rather than a text node that would have to be moved independent of the function block).  To change the shape of the block would be even better.

2)  I would like to have a push-button input to the circuit that I could operate during the simulation.  Can this be done?

3)  I would like to have a indicator light output from the circuit that I could view the current state of a line during the simulation.  Can this be done?

I will appreciate all help.

Thanks,
ray
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