I dont know if you are aware of this, but there is complete documentation on the OI and the RC on the innovationFirst website - I snarfed this text from the operator interface reference guide:
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Digital Inputs (see pinouts on pages 7-10)
Each port provides four unique digital inputs. PORT 2 provides access to the same digital inputs as
PORT 3, allowing access to 8 digital inputs from PORT 2. PORT 4 provides access to the same digital
inputs as PORT 1, allowing access to 8 digital inputs from PORT 4. To utilize these inputs, wire buttons
or switches between the desired digital input signal pin and any ground pin. A digital input senses a
connection to ground to become active. Do not connect switches or digital inputs to 5V. Do not use
lighted switches.
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so basically is you want to add more switches (switchbox) to the OI - you connec them between the digital input pins and the ground pin - see the table in the reference guide to see which pins correspond to which variable bits in the default code.
the full documenation is here:
http://www.innovationfirst.com/FIRST...umentation.htm
- Ken W - Sparkie engineer on team 578