39 lines
785 B
Plaintext
Executable File
39 lines
785 B
Plaintext
Executable File
// This file is part of www.nand2tetris.org
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// and the book "The Elements of Computing Systems"
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// by Nisan and Schocken, MIT Press.
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// File name: projects/3/a/PC.hdl
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/**
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* A 16-bit counter.
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* if reset(t): out(t+1) = 0
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* else if load(t): out(t+1) = in(t)
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* else if inc(t): out(t+1) = out(t) + 1
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* else out(t+1) = out(t)
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*/
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/*
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* Personal Notes
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*
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*
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*/
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CHIP PC {
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IN in[16], reset, load, inc;
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OUT out[16];
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PARTS:
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// Inc
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Inc16(in=regOut, out=inc16Out);
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Mux16(a=regOut, b=inc16Out, sel=inc, out=incOut);
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// Load
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Mux16(a=incOut, b=in, sel=load, out=loadOut);
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// Reset
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Mux16(a=loadOut, b[0..15]=false, sel=reset, out=resetOut);
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Register(in=resetOut, load=true , out=regOut, out=out);
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} |