OR

Abstract

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• Also known as Logical Sum, Union

$$A\cup B=\{x\in U:x\in A\vee x\in B\}$$

• Made of 2 Transistors (晶体管)

• Represented by

$A+B$

$$A\cup B$$

Use Cases

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Turn on Low-level Flags

• Low-level things like Interrupts (中断) is represented in one bit, different Interrupts (中断) has different bit
• We can use the OR Gate on the current status and the flags we want to turn on