HowTo: How To Build A Parallel Port Controller Box
(
Hill Robertson)
Step 11 : Multi-Write Hardware Schematic
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Here is the full schematic. Click on it to see the full (large) image. The parallel port control box in this how to is a multi-write configuration which means that each time a circuit is turned on or off, there are several clock cycles of data being sent from the PC to the box. In our scenario, each circuit state change requires 6 clock cycles.
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