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Best circuit designing program for designing cpu?

  1. Mar 14, 2015 #1
    Hey all, what is the best software (free) that allows you to build virtual circuits and 'run' them? Something that could support large circuits, such as a cpu?
     
  2. jcsd
  3. Mar 14, 2015 #2

    mfb

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    Staff: Mentor

    A modern CPU is a huge project.

    I built a very simple 16-bit CPU for university some years ago, I think we used Quartus - with a university licence, not the free version. I don't know how much the free version can do. You'll certainly want the feature to make new blocks out of individual circuits to combine them on a higher level, otherwise the circuit diagram will become way too messy.
     
  4. Mar 14, 2015 #3
    Forgot to mention i'm going for 8 bit. Thank you so much.
     
  5. Mar 14, 2015 #4
  6. Mar 15, 2015 #5
    try this site
    http://fpgacpu.org/
    I'd look at vhdl or Verilog on an fpga
     
  7. Mar 16, 2015 #6
    Xilinx ISE is alright if you don't mind using 'old' software, I've used that and modelsim for digital logic simulation before. Like thankz said, either VHDL or verilog will work.
     
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