Using sipeed's m1w module, equipped with k210 dual-core risc-v high-performance processor, it can run the GBA simulator smoothly, and can use the built-in npu to achieve more functions. The DAC uses PCM5102A, with complete analog-to-digital isolation, and can also be used as a portable player .
There is a bug in the PCB layout. The toggle switch should be farther out. The headphone jack should be placed between the LT button and the RT button, otherwise it will be difficult to press when plugging in the headset. The four resistors can be left alone. The microphone pad is not suitable for hand soldering.
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