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With the some of the new AMD Epyc CPUs having over 1GB of L3 cache, you could run a pretty full-featured Linux distro + app entirely in cache.

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If anyone can verify that Cache as RAM actually works on AMD though or explain how AMD boots without it that would be great:

>Cache-as-RAM (CAR) is no longer a supportable feature in AMD hardware.

https://git.furworks.de/coreboot-mirror/coreboot/commit/a245...

The PSP sets up the memory controller before the x86 cores are started. It's not implausible that the PSP has some sort of cache as RAM stage, but that's before Coreboot starts.

For a moment I was confused that the PlayStation Portable would have x86 cores.

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