Raspberry Pi in Vintage Computing and GPIO Pinout
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Raspberry Pi Powers Commodore 64 Expansion Cartridge, Plays Doom
Bringing the power to a 40+ year old vintage computer, the Raspberry Pi provides CPU horsepower and more RAM than the Commodore 64 could ever dream of.
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Raspberry Pi GPIO Pinout: What Each Pin Does on Pi 4, Earlier Models
The Raspberry Pi has 40 GPIO pins that connect to sensors, lights, motors and other devices. Here's a map and detailed explanation of what each does, including on the Pi 4.