I have a bit of a love/hate relationship with the Arduino. But if I had two serious ... I recently set out to use one of the cheap “blue pill” STM32 ARM boards. These are available for just ...

The Arduino ... GPIO pins can run via internal peripherals at up to 100MHz, which is plenty to handle the 1MHz clock speed of the Game Boy’s bus. Logic levels are an issue, as the STM32 uses ...