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I've done swap on an nbd share... with the nbd from busybox no less... on a SparcStation LX with Gentoo (compiled on a T2000)

Actually the TurboSparc based 3TX and 3000ST supported 256MB via undocumented factory upgrade... not sure how they did it exactly but it was official.

Might have been something as crazy as installing ram with a custom address line soldered on etc...

The 3GX from 1994 also supported 128MB but the simms had to be low profile and fast enough... so a bit hard to source.

Well a lot of the Alpha engineers ended up working on and helped design AMD's AMD64 extensions and hypertransport bus, after AMD adopted the Alpha's EV6 bus for the Athlon you could say Alpha technology and engineers had a huge effect on why AMD bested Intel for quite awhile back in the day.

If it wasn't for the Digital and AMD engineers we'd all be suffering with IA-64 etc... I think it's more likely PPC would have remained a force to be reckoned with in the Desktop space.