Those 4 big fat testpoints look like a UART to me... and those chips have a USB recovery mode: http://linux-sunxi.org/FEL https://twitter.com/PCBrown/status/793933537867022336 …
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Going by the CLV-001 model number and the "clover" u-boot prompt, the NES Mini is codenamed "Clover".
The OSS stuff on Nintendo's site contains a GPLv2 licensed driver for the controllers by NERD. Clover is the confirmed codename.
Interesting stuff, though reading about Allwinner's GPLv2 violations on http://linux-sunxi.org main page kind of sucked.
Chinese company ignores copyright law, news at 11.
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