Created
February 4, 2020 13:48
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CHIP CPU { | |
IN inM[16], // M value input (M = contents of RAM[A]) | |
instruction[16], // Instruction for execution | |
reset; // Signals whether to re-start the current | |
// program (reset==1) or continue executing | |
// the current program (reset==0). | |
OUT outM[16], // M value output | |
writeM, // Write to M? | |
addressM[15], // Address in data memory (of M) | |
pc[15]; // address of next instruction | |
PARTS: | |
// Put your code here: | |
Or16(a=instruction,b=instruction,out[15]=a1,out[12]=abit,out[11]=c1,out[10]=c2,out[9]=c3,out[8]=c4,out[7]=c5,out[6]=c6,out[5]=d1,out[4]=d2,out[3]=d3,out[2]=j1,out[1]=j2,out[0]=j3); // decoder | |
Not(in=a1,out=ains); | |
Not(in=ains,out=cins); | |
Mux16(a=muxin, b=instruction, sel=ains,out=out1); | |
Or(a=ains,b=d1,out=Ain); | |
ARegister(in=out1, load=Ain, out=out2,out[0..14]=addressM); | |
Mux16(a=out2, b=inM, sel=abit, out=outalu1); | |
And(a=cins,b=d2,out=loadD); | |
DRegister(in=muxin, load=loadD, out=outalu2); | |
ALU(x=outalu2, y=outalu1, zx=c1,nx=c2,zy=c3,ny=c4,f=c5,no=c6, zr=zrout, ng=ngout,out=outM,out=muxin); | |
Not(in=zrout,out=nzr); | |
Not(in=ngout,out=pg); | |
And (a=pg,b=nzr,out=pos); | |
And (a=ngout,b=j1,out=jl); | |
And (a=zrout,b=j2,out=je); | |
And (a=pos,b=j3,out=jg); | |
Or8Way(in[0]=je,in[1]=jl,in[2]=jg,out=jmain2); | |
And(a=cins,b=jmain2,out=jmain); | |
PC(in=out2, inc=true, load=jmain, reset=reset, out[0..14]=pc); | |
And (a=cins,b=d3,out=writeM); | |
} |
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