Specifications

66 Chapter 4—Simulation
Resistive vs. Forcing Drive
All primitive devices in LogicWorks output a forcing drive level, except
for the Resistor primitive device. The function of the Resistor device is to
convert a forcing drive on one side into a resistive drive on the other. This
can be used to modify the output of any existing device type by placing a
resistor in series with it. Note that LogicWorks does not model analog
properties of devices, so the resistor does not have a resistance value in the
analog sense. In particular, there is no interaction between resistor and
capacitor symbols to produce delay in lines. The delay effect can be simu-
lated by setting a delay value for the resistor.
Signal Probe Tool
The Signal Probe tool allows you to interactively examine and change val-
ues on individual signals and pins in the circuit diagram. When the probe
tip is clicked and held on a signal line or pin, the cursor will show the cur-
rent value on the signal or pin, and will track changes that occur as the sim-
ulation progresses.
Probing a Signal
Only the signal under the cursor at the time of the click is examined; mov-
ing the mouse while the button is pressed does not change the signal being
viewed.
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