| # Asicle |
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| Okay, so Wordle took the net by storm and was ported to a myriad of platforms including retro computers and |
| microcontrollers with tight constraints. But have you played it on raw silicon yet? |
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| After tapeout using the [OpenLane](https://github.com/The-OpenROAD-Project/OpenLane) flow and the |
| [Caravel](https://github.com/efabless/caravel) harness, put the manufactured chip on a board with 6 push buttons, |
| a VGA connector through resistor ladders as well as the usual Caravel requirements (voltage regulator, clock source, |
| flash memory & passives) and start playing. |
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| Sources live in `verilog/rtl`: |
| - `display.v` is responsible for showing the game screen. It builds on `vga.v` for interfacing with VGA hardware, |
| `frame.v` for the screen layout and `square.v` for rendering individual squares with letters. |
| - `control.v` contains code for the game logic and its inputs. It uses `wordlist.v` to generate solutions and to check whether |
| words are valid, `eval.v` to calculate the square colors and `debounce.v` to separate real button presses from |
| fake ones. |
| - `top.v` integrates the two aforementioned parts while `user_project.v` and `user_project_wrapper.v` provide |
| connections to the Caravel harness |
| - `font.mem` contains the Apache licensed font [Roboto Bold](https://fonts.google.com/specimen/Roboto) rendered at 38 pts |
| - `wordlist.mem` contains a public domain [word list](https://github.com/lorenbrichter/Words) |
| - `picks.mem` contains indices of a selection of 1000 words to be used as solutions, filtered by removing plurals, |
| past participles, proper nouns and a few obscure words and then sorting by their frequency on the English Wikipedia |
