Nathanael Huffman

I like FPGAs. Engineer @oxidecomputer

[Seth Winterroth 🤖 @Sethwinterroth]

Tough to express how proud I am of this team and what an achievement this shipping milestone is. The battles along the way were numerous and they make this victory that much sweeter. They’re just getting started.

Safe to say the computing world won’t be the same.

@bcantrill @sdtuck @steveklabnik @jessfraz @mrskatehicks @arjenroodselaar @ahl

[Kate Hicks @mrskatehicks]

So incredibly proud to have spent the last 3 years working alongside some of the smartest people I’ve ever met at @oxidecomputer. Today we did a thing… we officially shipped our first rack!

[Stargirl 🌠 @theavalkyrie]

✍️ New article: Creating a pick and place control board with the @Raspberry_Pi RP2040.

https://t.co/hZz8QZK8uu

[Nathanael Huffman @SyntheticGate]

@syncsrc So I did actually find that thing when trying (not) to make K.2, but I didn't find rigid U.2 extenders that were workable. The flexible cable doesn't work that well as I have to blind-mate it ~120mm deep in the sled's drive bay, with only ~23mm of horizontal space.

[Nathanael Huffman @SyntheticGate]

TFW you really need a CEM slot but only have U.2 bays…

[Nathanael Huffman @SyntheticGate]

@syncsrc Nope, doesn't fit in our drive bay. My extender is ~160mm long to get out far enough so we can connect the ethernet card without modifying the sled's enclosure.

[Nathanael Huffman @SyntheticGate]

@robdimond This is a 1Gbps NIC which is PCIe gen2 x1. I'm using no special low-loss material here, no custom stack-up, just a quick turn PCB. It's good enough for this use-case for which it was designed. Our actual sled and sharkfin riser can do PCIe gen4 x4 (using nicer material).

[Nathanael Huffman @SyntheticGate]

@baloose Yes, and our backplane is 100GigE which... isn't convenient for benchtop work.

[Nathanael Huffman @SyntheticGate]

Here it is working.

[Nathanael Huffman @SyntheticGate]

@specbranch Nope. You can see some more details about the storage system here: https://t.co/jJy02HN7HC

[Nathanael Huffman @SyntheticGate]

@mxshift @bitshiftmask @steveklabnik @oxidecomputer Ah yes the LSF0108 videos. They are helpful though.

[Nathanael Huffman @SyntheticGate]

@bitshiftmask @oxidecomputer We have another (as-of-yet untold) bidirectional level shifter story to tell when we discuss our 2nd pass server sled bring-up. Stay tuned! :)

[Nathanael Huffman @SyntheticGate]

@mxshift Too many. I answer with lies stored in Bitwarden

[Nathanael Huffman @SyntheticGate]

@c50bae86ae1b461 @jonmasters @oxidecomputer As I understand it, DDR5 has both side-band ECC (which like DDR4 etc facilitates detecting errors in the chip and/or on the coms channel, and may still be optional) and on-die ECC (strictly facilitating faster speeds and smaller process nodes with ~the same reliability as today)

[Nathanael Huffman @SyntheticGate]

@azonenberg I prefer a #15, the curve gives a lot of options when scraping solder mask or cutting traces.

[Nathanael Huffman @SyntheticGate]

@bcantrill @ahl @random_enginerd @AaronHartwig1 @arjenroodselaar U35 was also not the right part for that footprint so it was added manually with some creative rework

[Nathanael Huffman @SyntheticGate]

@bcantrill @ahl @random_enginerd @AaronHartwig1 @arjenroodselaar "Uh, can we add a programming header?" "Yep"

[Nathanael Huffman @SyntheticGate]

@bcantrill @ahl @random_enginerd @AaronHartwig1 @arjenroodselaar Some debug dongles

[Nathanael Huffman @SyntheticGate]

@bcantrill @ahl @random_enginerd @AaronHartwig1 @arjenroodselaar This board is so big we needed a scale reference:

[Nathanael Huffman @SyntheticGate]

@bcantrill Recursive hardware!