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When I run ALU-nostat.tst, the code executes perfectly. However, when I run ALU.tst, the code stops on line 1. If I then click the forward arrow again and allow it to test out the following test cases, it seems to work. I compared the output file generated with the compare file and I think that everything matches. The error seems to be before the cases are tested out because the output file is empty (only with the input and output column headers) before I click the forward arrow again.
set x %B0000000000000000, // x = 0
^ is the line where the test script stops. It is strange because it does not stop here:
set x %B0000000000000000,
on the no-stat script.
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The strange thing is that ALU-nostat.tst does work even though the first line is identical.
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In case it helps, the code is below.
PARTS:
Mux16(a=x[0..15],b[0..15]=false,sel=zx,out=x1);
Not16(in=x1,out=maybex);
Mux16(a=x1,b=maybex,sel=nx,out=x2);
Mux16(a=y[0..15],b[0..15]=false,sel=zy,out=y1);
Not16(in=y1,out=maybey);
Mux16(a=y1,b=maybey,sel=ny,out=y2);
And16(a=x2,b=y2,out=output1);//I dont know what is wrong here
Add16(a=x2,b=y2,out=output2);
Mux16(a=output1,b=output2,sel=f,out=output3);
Not16(in=output3,out=almost);
Mux16(a=output3,b=almost,sel=no,out=out);
Mux16(a=output3,b=almost,sel=no,out[15]=pt2);
Mux16(a=output3,b=almost,sel=no,out=pt3);
And(a=pt2,b=true,out=ngtest);
Add16(a=pt3,b[0..15]=true,out[15]=pinname);
Mux(a=pinname,b=false,sel=ngtest,out=zr);
And(a=pt2,b=true,out=ng);
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Even after commenting out all of the new lines for the zr and ng output pins, it is still giving me a comparison failure on line 1.
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Should I move on to chapter 3?
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Administrator
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Since it stops running and comparing as soon as it finds the first failure, seeing a failure at Line 1 does not bode well.
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But if I then click run afterward it works without failure. So lines two onwards work.
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In my ALU.test file, I don't have the Compute ~x block. I saw that on github in 2014, somebody's ALU.test did have this line. Mine has a !x line instead.
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It is not a problem with ALU.tst as I re-downloaded it and it still does not work. I do not understand what the error is.
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Should I try to redownload the simulator?
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I have tried changing out the test file and the hdl file with a solution on the internet to no avail. If I post my hdl file, could somebody run it on their computer to see if the error is with my simulator? Many thanks!
Mux16(a=x[0..15],b[0..15]=false,sel=zx,out=x1);
Not16(in=x1,out=maybex);
Mux16(a=x1,b=maybex,sel=nx,out=x2);
Mux16(a=y[0..15],b[0..15]=false,sel=zy,out=y1);
Not16(in=y1,out=maybey);
Mux16(a=y1,b=maybey,sel=ny,out=y2);
And16(a=x2,b=y2,out=output1);//I dont know what is wrong here
Add16(a=x2,b=y2,out=output2);
Mux16(a=output1,b=output2,sel=f,out=output3);
Not16(in=output3,out=almost);
Mux16(a=output3,b=almost,sel=no,out=out);
Mux16(a=output3,b=almost,sel=no,out[15]=pt2);
Mux16(a=output3,b=almost,sel=no,out=pt3);
And(a=pt2,b=true,out=ngtest);
Add16(a=pt3,b[0..15]=true,out[15]=pinname);
Mux(a=pinname,b=false,sel=ngtest,out=zr);
And(a=pt2,b=true,out=ng);
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