CPX
(compare data and X) Tags: NZC
Description:
Compares the data with the X register by performing a subtraction (X - data). Sets the N, Z, and C tags without saving the result of the subtraction anywhere. Z is set when the result is zero, otherwise zeroed. N takes on the value of the highest bit of the result. C is set for X>=data, erased for X<data.
Example:
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