So what's state-of-the-art in open-source ?

Is where it's at? I'm interested in synthesizing cpu cores which I think puts me in the area of large-ish fabric devices but again I stopped looking for a few months and now I feel like I have no idea what to expect :)

@vertigo @h @cstanhope

@jjg @h @cstanhope reverse engineering work with Xilinx artix 7 is ongoing. Otherwise, the state-of-the-art is the Yosys tool chain for the iCE40HX family.

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@jjg @vertigo I read through the thread. I agree with Vertigo's assessment. Yosys is the state-of-the-art FLOSS toolchain. You can do a lot without ever touching a board. Of course, getting your hands on hardware can be a big part of the fun, so don't let me stop you.

If you do find yourself wanting to target hardware not supported by the FLOSS tools, I find that dedicating a virtual machine to the Xilinx or Altera tools into virtual machines works best. I use Vagrant at work to help with this.

@vertigo @jjg *sigh* typos... Hopefully it was clear what I meant.

@cstanhope @jjg Since it's always easier to consolidate multiple separate FPGAs onto a single, larger, FPGA, it's actually an advantage that I'm working with Yosys to start with.

I have an Altera/Terasic DE-1 on my desk that I'd like to work with as well, and getting Kestrel-3 running on the Cyclone II part it has should be much easier once it's known working on the two iCE40s first.

If I'd done the Cyclone II first, I'd have to figure out where to cleave the design, if it was at all possible.

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