7400 competition entry: A CPLD-based 8×8 game-of-life

Udif has entered a CPLD-based 8×8 game-of-life into the 7400 Contest. As can be seen on the picture, the design uses 3 of our CPLD breakout boards, which you can grab at Seeed for $15.

The project was coded in Verilog, using many small modules. The reason for that was that I wanted to be able to easily fit it into multiple XC9572XL boards I had. The naive approach would have been to put the large data shift register in one device, and the rest of the logic in a 2nd device, but this turned out to be impossible due to lack of I/O’s in the other device. I ended up parametrically splitting the data array between the two devices so I can easily balance a few macorcells here or there in each device, if the need arises. I also made sure the design fits in an XC2C128 device I had.

Check out the video after the break.

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