46 lines
2.1 KiB
Plaintext
46 lines
2.1 KiB
Plaintext
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// This file is part of the materials accompanying the book
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// "The Elements of Computing Systems" by Nisan and Schocken,
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// MIT Press. Book site: www.idc.ac.il/tecs
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// File name: projects/03/b/RAM512.hdl
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/**
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* Memory of 512 registers, each 16 bit-wide. Out holds the value
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* stored at the memory location specified by address. If load==1, then
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* the in value is loaded into the memory location specified by address
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* (the loaded value will be emitted to out from the next time step onward).
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*/
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CHIP RAM512 {
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IN in[16], load, address[9];
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OUT out[16];
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PARTS:
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// Put your code here:
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DMux8Way(in=load, sel=address[6..8], a=toRAM64A,
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b=toRAM64B,
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c=toRAM64C,
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d=toRAM64D,
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e=toRAM64E,
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f=toRAM64F,
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g=toRAM64G,
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h=toRAM64H);
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RAM64(in=in, load=toRAM64A, address=address[0..5], out=fromRAM64A);
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RAM64(in=in, load=toRAM64B, address=address[0..5], out=fromRAM64B);
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RAM64(in=in, load=toRAM64C, address=address[0..5], out=fromRAM64C);
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RAM64(in=in, load=toRAM64D, address=address[0..5], out=fromRAM64D);
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RAM64(in=in, load=toRAM64E, address=address[0..5], out=fromRAM64E);
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RAM64(in=in, load=toRAM64F, address=address[0..5], out=fromRAM64F);
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RAM64(in=in, load=toRAM64G, address=address[0..5], out=fromRAM64G);
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RAM64(in=in, load=toRAM64H, address=address[0..5], out=fromRAM64H);
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Mux8Way16(sel=address[6..8], out=out, a=fromRAM64A,
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b=fromRAM64B,
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c=fromRAM64C,
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d=fromRAM64D,
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e=fromRAM64E,
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f=fromRAM64F,
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g=fromRAM64G,
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h=fromRAM64H);
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}
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