In SX Microcontrollers, SX/B Compiler and SX-Key Tool, Zoot wrote:

No, it's a hardware issue. If the button is wired as "active low", i.e., it is tied to ground when pressed, then it will read as a "0" when pressed, "1" otherwise.

You would need to adjust for this in firmware, either by setting a flag to 1 (so that regardless of how the device is wired, your code can read a "1" for a pressed button), or by changing what happens at the jump. I used the former technique in my example above. The question is -- how is your circuit actually wired?

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