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"IBM has a well-known disdain for vowels, and basically refuses to use them for mnemonics (they were called on this, and did "eieio" as an instruction just to try to make up for it)."

- Linus Torvalds, 2009 (http://yarchive.net/comp/linux/coding_style.html)

Haha, didn't know that. I figured an engineer had a kid with an affinity for Old MacDonald.

Old MacDonald had a (server) farm, eieio...

The thing I love about the eieio instruction is that it serves the same purpose on-chip as in the song. Sort of a sync point.

And if you use it once, you tend to use it multiple times, each with a little code.

* Peek a value that's MMIO

* EIEIO

* Poke right back into MMIO

* EIEIO

I've always been a fan of HCF.

https://en.m.wikipedia.org/wiki/Halt_and_Catch_Fire