2020-05-19 12:42:52 +00:00
|
|
|
// 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/01/Or8Way.hdl
|
|
|
|
|
|
|
|
/**
|
2020-05-19 17:22:09 +00:00
|
|
|
* 8-way Or:
|
2020-05-19 12:42:52 +00:00
|
|
|
* out = (in[0] or in[1] or ... or in[7])
|
|
|
|
*/
|
|
|
|
|
2020-05-19 17:22:09 +00:00
|
|
|
// COST = 7x3 = 21 NAND Gates
|
|
|
|
|
2020-05-19 12:42:52 +00:00
|
|
|
CHIP Or8Way {
|
|
|
|
IN in[8];
|
|
|
|
OUT out;
|
|
|
|
|
|
|
|
PARTS:
|
2020-05-19 17:22:09 +00:00
|
|
|
Or(a=in[0], b=in[1], out=p);
|
|
|
|
Or(a=in[2], b=in[3], out=q);
|
|
|
|
Or(a=in[4], b=in[5], out=r);
|
|
|
|
Or(a=in[6], b=in[7], out=s);
|
|
|
|
|
|
|
|
Or(a=p, b=q, out=x);
|
|
|
|
Or(a=r, b=s, out=y);
|
|
|
|
|
|
|
|
Or(a=x, b=y, out=out);
|
|
|
|
}
|