Compute R3 - R2

20FF

2101

2225

233F

9402

5434

5414

C000

• Load register 0 with the number FF

• Load register 1 with the number 1

• Load register 3 with X (say 3F)

• Load register 2 with Y (say 25)

• Combine registers 0 and 2 with XOR  and store the result in register 4

• Add registers 3 and 4, store the result in  register 4

• Add registers 1 and 4, store the result in  register 4

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