Elm Town artwork

Elm Town 40 – A Game Boy Emulator in Elm

Elm Town

English - November 21, 2018 00:34 - 42 minutes - 39.1 MB - ★★★★★ - 13 ratings
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Previous Episode: Elm Town 39 - I Used Elm And It Cost Me My Job
Next Episode: Elm Town 41 – Confetti and Waterfalls

Manuel Fuchs shares what he learned by taking on a very unusual Elm project: a Nintendo Game Boy emulator!


Thank you to our sponsors, Ellie, Culture Amp and Joel Clermont.


Special thanks to Xavier Ho (@Xavier_Ho) for editing and production of this episode!


Recording date: 2018-11-10


Guests

Manuel Fuchs (@malax)

Show Notes

00:00 Show opening


01:58 Manuel's journey to Elm


07:09 Why a Game Boy emulator

Tetris Effect
video: Writing a Game Boy Emulator in Ruby

12:19 False assumptions and unexpected difficulties


18:37 Loading Game Boy ROM images as binary data


19:59 Breaking out of the Elm Architecture


22:30 Implementing a CPU instruction set in Elm

Elmboy source code

25:46 Debugging and profiling


27:03 Throwing out types


31:49 Adding Pokemon compatibility


33:30 Readability, teaching and welcoming contributors


34:57 More performance optimisations


41:05 Elm + Game Boy = fun

Try Elmboy

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