In order to show an alert in players' GUIs, "Show alert" must be ticked. Both text and an icon can be specified, as seen in the check mark image above. The range at full volume appears to be 64 tiles.Īs well as playing a sound, it can also be set to send a GUI text alert so the player can see what has caused the alarm. This determines the audio volume, and the carry distance if global playback is unticked. The volume of the programmable speaker can be controlled in the GUI. Only 50 sounds can be heard at once due to a game limitation. As a courtesy, only enable global play on multiplayer when it is important that all players be notified. It can be toggled whether the sound plays globally so that it can be heard anywhere on the map, or locally so it will only be audible in the immediate vicinity of the speaker. It can be connected to the circuit network to produce an alert when a signal drops below a certain value, for example. Tinkering with a Game Boy and developing custom cartridges could short-circuit or otherwise damage the now-retro handheld.The programmable speaker is a circuit network entity that is capable of producing alerts in the form of sound, and elements on nearby players' guis. After reviewing Staacks’ instructions, the cartridge seems impossible to replicate successfully without some electrical engineering knowledge.ĭespite his achievement, Staacks admits that his creation is “a hack” and should not be attempted unless aspiring engineers are aware of the risks. Staacks goes into intricate detail on his website, breaking down his process into a step-by-step explanation.Ĭhallenges and risks - While tinkering away on a Game Boy cartridge might seem like a fun way to pass spare time over the holidays, it’s not for the faint of heart. The code was drawn from the Game Boy Development kit, which is also publicly available on GitHub. After the hardware had been refined, he wrote the code for the cartridge’s software. How it works - Through a miracle of electrical engineering, Staacks first designed the hardware for the 32kiB cartridge and added a ESP8266 chip to enable the WiFi feature.
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