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Video: LPX (updated) (Patreon)

Published:
2025-07-15 21:27:08
Edited:
2025-07-16 03:00:16
Imported:
2026-06
Tags:

Content

New version, fixed some minor errors and one big factual one lol (XT had 8 slots, not 7)

haven't thought of a name for this one yet and it's kind of a mishmash of several different incomplete topics that i think i successfully pulled together into a coherent narrative. at this point I can't tell if I succeeded or not. Please Enjoy

Files

LPX RC4

Support me on Patreon: https://www.patreon.com/cathoderaydude Tip me: https://ko-fi.com/cathoderaydude

Comments

Zen The Fox

Just what I needed after a long shift today. Thanks Gravis 🦊💚

Curtis Golen

When you said it was ATX birthday , I looked at my wife and said “hey I remember when that came out” And then you hit me with that 30 years old. That hurt.

sdomi

why yes i could use a CRD video to pick me up after several personal clusterfucks this week <3 thank you Gravis

Cory P.

I did think how nice it would be to have a new Gravis video when I got home from GDQ. Hooray!

Mees Boe

I will enjoy this thank you very much

sdomi

circa 35:15 misaligned `pop` sound (text is shown before the pop)

Loading_M_

A few minor guesses of my own, having not been alive for any of this (I was born after ATX was standardized), but having worked at IBM for a little over a year. "Baby AT" just seems like an industry term for more modern hardware (AT-style hardware) in an XT form factor. For all the reasons you talked about, it's hard to sell a board in a new form factor, but it's probably quite a bit easier to sell a new AT board if it fits into any XT case you happen to have lying around. "Network Node" - from the few times I've used that term in university and professionally, it's just meant any device attached to a network - e.g., a computer with a NIC, but also routers, switches, etc. I'm betting it's just marketing guff for selling to businesses. I absolutely agree that ODM were likely a huge part of this. I wonder if some portion of LPX was written down, but only in Taiwanese, since none of their English-speaking customers cared. It may also be the case that 'LPX' was only really considered a standard in hindsight.

Loading_M_

Also, I love the video. Wonderful work.

nytpu

Two very minor issues: typo at 20:22 of “almost as bit” instead of “almost as big”; and the timing of the “heads-up noise” is like ten seconds delayed from an overlay showing on-screen at 35:07

Chas Becht

Another thing that was introduced with the ps/2 line that had lasting impact was the VGA standard.

IrisRealtime

I think you do look better without one, just wondered where it went. Terrific video btw

cathoderaydude

...god you know, I can't really believe I didn't think of that. I'll probably get roasted in the comments for it lmfao

Crash Cash

3:45 "of 15 vendors I know of only 2 not planning to use it" - I wonder who those two were. I assume they're long gone.

Brielle Garcia

Oh Hell yup. An hour long video on a thing I didn’t know about? That’s why I’m a patron. Your videos bring genuine joy to my life. Thanks!

Crash Cash

"Integrating a lot into an ASIC" - well, that's when "chipsets" & "southbridges" & "northbridges" came out. Not so much with the 386, but the 486 sure went hard on that.

Alex Cruise

I've probably already brain dumped this here, but my first 16 bit machine was a turbo XT clone, a Samsung SPC3000 series. Its main quirk was that the CPU, RAM etc. were all on a max size daughtercard, and the motherboard was mostly just a backplane, as you can see in this listing: https://share.google/7h3F9TKJQ3pdTIg8q ... I think the strategy was to reuse the same motherboard, case etc. but allow higher spec CPUs while minimizing redesign. Mine came with an ATI Wonder CGA/Hercules combo card and two 5.25 floppy drives; I later bought an 85mb hard drive for US$270 including an 8-bit ISA SCSI card from some vendor in The Computer Paper, which was at least an inch and a half thick every month in those days, and started a BBS of course!

Crash Cash

Speaking of "birthdays" - IBM announced the original 5150 PC on 12-AUG-1981

Anthony Biondo

These videos always send me down rabbit holes. I haven't found anything strictly relevant but I was poking around patents and found a 1988-filed patent assigned to AST describing fairly perfectly this kind of riser-design. https://patents.google.com/patent/US5038308A Also, that patent referenced a 1985 IBM disclosure - apparently they made these public disclosures to prevent folk from patenting their computers. I sent a request to the NYPL to scan it because I couldn't find it online anymore. It's not the riser design, but it is an interesting somewhat industrial version of the XT I think. I uploaded what the NYPL scanned here: https://tmp.biondo.net/ibm-pc.pdf

HotKey

"With small power comes small responsibility" or something... don't know, didn't watch transformers 🤡

Twenty After Four

Hey it's my birthday too. I'm way older than ATX though.