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eceg431/01/Or.hdl

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// This file is part of www.nand2tetris.org
// and the book "The Elements of Computing Systems"
// by Nisan and Schocken, MIT Press.
// File name: projects/1/Or.hdl
/**
* Or gate:
* if (a or b) out = 1, else out = 0
*/
CHIP Or {
IN a, b;
OUT out;
PARTS:
// Or = Not(And(Not(a), Not(b)))
Not(in=a, out=tmp1);
Not(in=b, out=tmp2);
And(a=tmp1, b=tmp2, out=tmp3);
Not(in=tmp3, out=out);
}