29 lines
2.1 KiB
Plaintext
29 lines
2.1 KiB
Plaintext
// 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[0]=address[0],sel[1]=address[1],sel[2]=address[2],a=a,b=b,c=c,d=d,e=e,f=f,g=g,h=h);
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RAM64(in=in,load=a,address[0]=address[3],address[1]=address[4],address[2]=address[5],address[3]=address[6],address[4]=address[7],address[5]=address[8],out=out1);
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RAM64(in=in,load=b,address[0]=address[3],address[1]=address[4],address[2]=address[5],address[3]=address[6],address[4]=address[7],address[5]=address[8],out=out2);
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RAM64(in=in,load=c,address[0]=address[3],address[1]=address[4],address[2]=address[5],address[3]=address[6],address[4]=address[7],address[5]=address[8],out=out3);
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RAM64(in=in,load=d,address[0]=address[3],address[1]=address[4],address[2]=address[5],address[3]=address[6],address[4]=address[7],address[5]=address[8],out=out4);
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RAM64(in=in,load=e,address[0]=address[3],address[1]=address[4],address[2]=address[5],address[3]=address[6],address[4]=address[7],address[5]=address[8],out=out5);
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RAM64(in=in,load=f,address[0]=address[3],address[1]=address[4],address[2]=address[5],address[3]=address[6],address[4]=address[7],address[5]=address[8],out=out6);
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RAM64(in=in,load=g,address[0]=address[3],address[1]=address[4],address[2]=address[5],address[3]=address[6],address[4]=address[7],address[5]=address[8],out=out7);
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RAM64(in=in,load=h,address[0]=address[3],address[1]=address[4],address[2]=address[5],address[3]=address[6],address[4]=address[7],address[5]=address[8],out=out8);
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Mux8Way16(a=out1,b=out2,c=out3,d=out4,e=out5,f=out6,g=out7,h=out8,sel[0]=address[0],sel[1]=address[1],sel[2]=address[2],out=out);
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} |