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22 lines
843 B
Plaintext
22 lines
843 B
Plaintext
// 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/b/RAM16K.hdl
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/**
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* Memory of 16K 16-bit registers.
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* If load is asserted, the value of the register selected by
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* address is set to in; Otherwise, the value does not change.
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* The value of the selected register is emitted by out.
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*/
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CHIP RAM16K {
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IN in[16], load, address[14];
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OUT out[16];
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PARTS:
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DMux4Way(in=load, sel=address[0..1], a=x1, b=x2, c=x3, d=x4);
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RAM4K(in=in, out=y1, load=x1, address=address[2..13]);
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RAM4K(in=in, out=y2, load=x2, address=address[2..13]);
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RAM4K(in=in, out=y3, load=x3, address=address[2..13]);
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RAM4K(in=in, out=y4, load=x4, address=address[2..13]);
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Mux4Way16(a=y1, b=y2, c=y3, d=y4, sel=address[0..1], out=out);
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} |