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### Notes:

The truth table (A and B are inputs and X is an output) for an EX-OR gate is:

__A B X__

0 0 0

0 1 1

1 0 1

1 1 0

The eora instruction performs a bit-by-bit EX-ORing of the bits in the destination register with the operand. In this example bit 0 of register A is EX-ORed with bit 0 of the number f0 hex, and bit 1 of A is EX-ORed with bit 1 of the number f0 hex etc.