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There's already one! https://github.com/sybreon/dcpu16

The core is written entirely in synthesisable Verilog RTL. Synthesises to about 700+ Slices at around 150MHz on a Spartan6. (minus h/w division and modulo)

Feel free to extend/expand/contribute.

I posted it on HN yesterday. http://news.ycombinator.com/item?id=3821400

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Neat! I'll check it out tonight. HW division and mod are going to be difficult-ish: I was thinking that either I could use a DSP block or, failing that, bump up the clock frequency of the LUTs used for div/mod until the 16div16 operation can appear to occur in 3 main CPU cycles. I'd love to contribute whatever I can to the project - I mostly work with Lattice stuff but I guess it couldn't hurt to give Xilinx's tools a try^^ Thanks!

Multi-cycle operations can actually be inserted into the pipeline. The `ena` signal would just need to be held low during that time.

There is also a VHDL implementation that was just released: https://github.com/isuru-c-p/DCPU16-VHDL

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