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Comment by xwdv | Hacker News Reader

Can a Furby run doom?

They tried to get one of the newer ones with the digital display eyes to do it but the CPU of those is one of those nasty Sunplus ones that are real uncharted territory with their u'nSP instruction set. https://devpost.com/software/doomfurb

I'm actually the guy (Sam) from that post! Never got DOOM running on the Furby, but I was able to get a custom version of Pong running, with accelerometer controlled paddles.

The CPUs are definitely weird, and I ended up porting Ghidra to support u'nSP as part of that project. https://github.com/SamuelWAnderson45/sleigh-unsp Reverse engineering a CPU was a wildly fun learning experience; still proud of that project.

Can you share any more details about the Pong port? I have been collecting various bits of information about u'nSP processors, particularly the SPG2xx series used in mid 2000s plug-and-play games, but so far I have never seen an actual homebrew game for any of these chips (with the exception of the Mattel Hyperscan's SPG293, which however uses a different architecture).

I have also been looking into the newer GeneralPlus GPM4x30 SoCs used by some modern Chinese plug-and-plays with HDMI output, at least by the ones that aren't straight up Famiclones hardwired to a composite to HDMI upscaler. Those are ARM based so much less of a pain to reverse engineer but also much less fun...

Busy at the moment, but send me a message at samuelwanderson45 @ gmail . com and I'll try to get back to you

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