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Congratulations on (nearly) making it through another year, happy holidays to anyone who's celebrating them, and thank you all so much for everything.

I've already thanked you all a thousand times for the life you've made possible, and I don't want to dwell on money issues, but I do want to express my deepest gratitude to everyone who donated to the gofundme. It wiped out the vet bills, plus a chunk of credit card debt, and as it happens, also allowed me to make my car much safer.

I told this story during my last livestream but in short, I didn't realize just how bald my tires were; apparently Toyota Siennas eat up tread at a ridiculous pace, so the brand new tires I put on in 2022 were already failing the penny test. Sienna tires aren't cheap either, but the leftovers from the gofundme were enough to get some really good water+snow tires (michelin crossclimate 2s) which should be far safer in the probably-ongoing rain. If things go well, I'm going to drive down to California early next year and pick up some new and exciting channel material, and I will feel a lot better about that drive with these wheels. Without your help I would have had to put that off for a couple months, so, thank you again, your contributions helped keep my sanity intact.

2025 was a hell of a year, one of the worst of my life to be frank, and not all of it's nightmares have faded into the past yet, but I have emotionally recovered from the Sara+Udon situation, I think, and I'm looking forward to 2026. I'm confident it'll go better, and I hope the same is true for all of you.

Now, with that out of the way: I've kinda decided that, since I have so much crap that isn't going to show up in videos any time soon, I should really include at least a teaser in every post I make on here, otherwise I'll never get through it all. So, let me show you the wacky computers I just received.

(I should note: The person who owned these (or similar machines) may have been in touch with me about them - I could swear I had some kind of conversation on this topic with someone who was negotiating to get me a set, and I just got overwhelmed and forgot to get back to them. If that was you, sorry, I'm doing my best. Anyway.)

These are 24-frame Compaqs, as described to me, though they aren't all Compaqs. In any case, they're a set of PCs (486 class) that have been heavily modified to enable them to be used on film sets.

When filming a CRT, if you don't want to get ugly and distracting strobe effects, you need the tube to scan at the exact same rate and phase as the camera shutter. In TV productions, using TV displays, this isn't so hard - news sets in the 80s and 90s used CRTs that were genlocked to everything else, so that the screens were refreshed in perfect lockstep with the cameras shooting them. No bars, no flicker. Film is harder, however, since the standard film framerate is 24 FPS, a frequency no CRT in existence has ever supported, and computer monitors are even harder since virtually no PC supports genlocking.

To solve both these problems, several companies built machines like these, with customized VGA cards that could output 48hz. That's a lower frequency than most computer users will have ever seen before, but since the IBM 8514 (which gave us the 1024x768 resolution back in 1987) scanned at 43hz, this odd refresh rate was actually within the gamut of multisync monitors sold in the late 80s and 90s. And, since it's exactly twice the rate of a film camera shutter, it can be genlocked.

Here's one of the machines, branded by Sparkology, the one-man system builder who put them together. This is one of myriad businesses of this sort, who build things that are needed solely in the film industry, and which are genuinely necessary for productions big and small, yet don't have enough demand to justify a "real business," manufacturing custom hardware from the ground up to serve the need.

The scrappiness of the product should be apparent from the misaligned BNC plugs, ballpoint-labeled switches, and extremely poorly cut out label on the front. I doubt the guy made more than a dozen of these things, if even that; given that he himself dropped them off at an ecycle store that a good friend works at when he was getting out of the business, it's possible these three are the only ones he ever built.

So, how do they work? Damned if I know. I'm thinking of trying to get a hold of the fellow to see if he'd be interested in talking about his work; he seems like a bit of a character from his website, with a history working at ILM among other things. As far as I know he modified these things himself, and the mods are... extensive.

I really do not know what's going on in here at all. There's a rats nest of wires going all over, some clearly handmade PCBs attached to what I think is an off the shelf ET4000 graphics card, a little helper board of some kind glued to the ISA riser, a jumper soldered to a pair of pins on the ISA bus which I think goes to the knob on the front labeled "speed trim"... yeah. Reverse engineering this would probably be impossible for me, so hopefully I can get an explanation from the horse's mouth.

In any case however, they came to me with the hard drives intact, which is good because they're completely useless without the custom software to make the hardware function. In addition to that however, there's also some material from productions this was actually used in! I ripped one of the hard drives and booted it up in 86box to find the machine was running Windows 3.1, and the primary production tool was Macromedia Director.

This is a shot from Metro (1997), a seemingly dismal Eddie Murphy vehicle. It seems like they made a LOT more CG than actually got used in the film so I suspect there were some cut scenes, though I don't know if I want to bother getting the DVD in order to prove that.

This is the TDD 911 call from Scream (1996) - and an interesting detail is that there are two copies of the file. One is what you see here, which has a few more lines than actually appear in the movie (the scene in the film is extremely brief and shot in extreme closeup), while the other is watermarked as a demo; I guess the production was shopping CG vendors and decided to go with Sparkology! Another interesting note is that the folder is named "scarymovie" which, apparently, was the working title for Scream.

Finally, a shot from Nash Bridges (1996-2002), the atrocious and deeply confusing Don Johnson vehicle that also starred an extremely bemused Cheech Marin who visibly had no idea what he was doing there or what they wanted from him. If you've never seen this thing, please check it out, it is the worst TV show I've seen in my entire life and I cannot believe it ever got aired, let alone for six seasons. In any case, there's material on this drive from a half dozen episodes.

It goes without saying that this is one of the more fascinating artifacts I've found or received in my travels. I have never really gotten over the magic of movies, and they also tend to feel kind of timeless to me. So it really boggles my mind to look at these framegrabs and realize that the very machine sitting on my desk here was on those movie sets as they were being shot. It's one thing to have "the kind of machine" that was used, and quite another to have the exact one - even if these specific productions aren't exactly the pinnacle of the film or TV artforms.

Anyway, hope you all had fun reading this post, and have a merry christmas or whatever else you're doing!

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Comments

Piper

CrossClimate2 are probably the best tire you can put on a Sienna - you’re in good hands with those! And hopefully they can last a while

Javier Matusevich

Merry Christmas! The genlocked compaqs look super interesting. Happy to contribute to your vet bills, and again, I’m so sorry about the woes of this year. Here’s to a better 2026 for all of us

Trekintosh

What a fantastic find! Thanks for sharing the story. I’m presuming that without further input from the engineer these probably aren’t going to make a video, so it’s great to see behind the scenes!

Sean Heller

Among us horror nerds, Scream IS one of the pinnacles!

Travis Noble

Gravis, the cat distribution system has bestowed upon me a beautiful fluffy girl for Christmas. In honor of Sara and Udon, could you (and fellow patrons) help me name my pretty girl? Pics - https://imgur.com/a/U89Guq2

cathoderaydude

Oh, I'm sure I could make *A* video about it, assuming they work. It'd be nice to have the additional details and history though. That "assuming they work" is doing a lot of lifting fwiw - the battery in this machine has leaked and trashed the board so I don't know if it'll actually boot, and I haven't looked at the others yet, so, fingers crossed.

cathoderaydude

She's absolutely beautiful. Consider: Cabbie, and it's short for cabbage.

sen

These systems are so neat! The ET4000 was known for being super flexible timings-wise so that makes sense, and there's a 14.318MHz signal on the ISA bus ("OSC" signal) that was used for graphics stuff sometimes (the original PC motherboard had a "Color Adjust" adjustment on it to tweak CGA colours by adjusting it) so I wonder if that's what the Speed Trim is tweaking. If you do end up down any kind of reverse engineering rabbit hole and I can be of remote assistance with any reverse engineering efforts I'd be happy to, this kind of thing is fascinating :)

cathoderaydude

The big question of course is, exactly how *is* it tweaking it? I wonder if the knob is a variable capacitor or something. That might make sense, if the adjustment only needs to be on the order of like, fractions of a hertz.

sen

The C. ADJ control on the PC motherboard was a variable capacitor, so that well could be!

Twenty After Four

I agree, that would be the most likely mechanism.

cathoderaydude

Hah! Well then, I'll take a look at the 5150 schematics and see if they attach to the same line. Thanks!

Crash Cash

Just to be my mother: you did get an alignment, so it won't eat the new tires, right? I know you're smarter than that, but I must ask or I won't sleep tonight.

cathoderaydude

hahaha, okay, well, it turns out those wires go to... the CPU fan. I guess they just needed 5V and that was the easiest place to get it?????? The trimmer appears to be a 10-turn pot connected to the custom circuitry on the ET4000, and I strongly suspect that's the only custom part in the entire machine, the graphics card itself.

cathoderaydude

I haven't had a chance yet, discount tire doesn't do them. It does still drive straight at least, so they didn't knock it too too far out.

Isaac Alvarado

I put a pair on my Outback this year and they seem great for all seasons. But man are they squishy. They almost make me nauseous when going around turns. I’ve never really noticed how much a tire squishes before these.

Crash Cash

Funny story: I went to Atari Computer camp in Asheville, NC in '82. I met Dr. Alan Kay and he was impressed by some stuff I did, so he offered me a job after high school. Another funny story: the video game crash of '83, but you guys already know that one. Anyway, the Today Show came to us, and I got "volunteered" to be the kid. So I'm sitting there with Jane Pauley excitedly pointing to things on the screen and explaining them. They didn't sync with the monitor, so I'm looking like a complete idiot pointing at a blank screen, talking nonsense. Er, yay? OMFG - "Nash Bridges" - the "Don Johnson did so great in Miami Vice and made us a ton of money, so let's milk that as hard as we can" show. It says something about the quality of TV of that time period that it ran 6 seasons. Everything else on TV sucked just as bad, and we had no choice. I lived through that. "one-man system builder" - a cool story is Arthur David Olson. He's the guy that developed and maintained the UNIX tz database, used by about every UNIX box on the planet and a full page of software on Wikipedia. By himself. For decades starting before '86. Then in 2011 he got sued by Astrolabe for using some of their reference materials as reference materials. Like, you know, they're meant to be used. And he threw in the towel and shut everything down. So everybody went "can the rest of the team pick this up?" and the entire internet was shocked to hear "what team, bitches?" and the EFF stepped in and said "we'll fight this lawsuit to the bitter end" and Astrolabe backed off. After that, Mr. Olson did "retire" - ICANN took over the database, and he still maintains the code itself. Edit: I just looked, and Wikipedia deleted the entire article on this and rolled it into a paragraph in the tz article. Also people don't like his code because it's complicated to handle all the cases. Every time they "simplify" it, it just brings in bugs and there is a lot of screaming at each other.

Crash Cash

Holy. Fucking. Shit. Yes. I had no idea this would even be on YT. There's me at like 16. Whelp. I'm gonna just hide under the bed and never come out again. However this one DOES have the screen display, so I'm confused.

cathoderaydude

Oh gosh, I hope it's not actually upsetting. If you don't mind my asking - I assume that's you at around 2:43?

Wonkodon.com Fund

That's some cool shit right there! I'd love to dig into the mods, but I'm a bit of a 80s & 90s hardware nerd. Happy passing of Winter Solstice! May the ran stop and the sun show up a few times a week for you when you're outside. Best wishes for next year.

Travis Noble

Cabbie she shall be. thank you brother, Merry Christmas ❤️

Crash Cash

Yeppers, it sure is. Man, that was rough. Normally for videos I do for work, I just grit the teeth and bear it, but my brain was like "NOPEITTY NOPE-NOPE-NOPE HATETHATGUY ALT-F4!" But since I'm going to send this around to my friends, I had to get over it, and it built some character. Had to take another shower and go into the garage and lift a 388lb battery out of my electric racebike first though. Actually, come to think of it, I think I left the room when it came on TV. Thank you for digging this up! It's such a blast from the past. My team lead at work is gonna flip when she sees this.

cathoderaydude

Okay phew, haha, was worried I had performed a party foul. I'm really glad I could dig this up for you, it's truly amazing what gets uploaded to YouTube that you'd never know was on there if you didn't go looking for it. I literally just put in 1982 Atari camp today show and there it was. If it counts for anything, I think you actually performed quite well especially for your age, if I had been in your shoes it would have been 5,000% more cringeworthy.

Nene

A couple of fun little things about the frame rate for these. It's not just that 48Hz can be genlocked, but it's the best frequency to use. As you noted, it's a multiple of 24 Hz, so can be synchronised, but 24 Hz would mean that half the screen would be blank, because the shutter angle is still 180°. So you need 48Hz so that one entire scan is completed whilst the shutter is open, then the next scan isn't seen at all, and all it repeats over and over. I'm 99% sure the timing knob is there for the same reason it was on cameras; you need to introduce a fixed delay to the timing pulse in order to account for the time it took the black burst to travel along the wires and be processed by the analogue circuitry. It would be different for each device, any time you changed cables, and would also change over time as things age, and with temperature too. To set it up they would have had to test it and calibrate it each time. Perhaps they had an analogue camera to use, but they likely would have needed the video assist from the production camera to check, and then confirmed it with rushes. As it was explained to me, in a lot of cameras the video assist and optical view finders would be looking through the lens using the reflection from the shutter being closed.

Torbjörn Lindgren

My first question was "why not 72Hz" (3x24) - since most graphics cards and many monitor of the era happily does that - some has pre-made VESA modes and pretty much everything can do it with just a custom resolution. So either they needed the adjustability, it was "too early" for that or 72 Hz had larger chance of getting a partial second scan (causing the top to be brighter). Might well have "all of the above".

RavenWorks

PLEASE put these Director files on the internet archive somewhere! This feels like an incredible find; like a movie prop but digital?

sen

Hah, that makes even more sense! Post-EGA cards don’t usually use the OSC signal but it was the only thing on the ISA slot that made even a little sense. An oscillator mod on the card itself makes more sense, as does a 10-turn.

Loading_M_

Tbf, if the only modded part is the card, you might be able to swap in a different board. It's probably harder than normal since you also need to avoid breaking the modded card.

cathoderaydude

I am literally at the REPC as I post this looking through replacement motherboards lol

Loading_M_

These look super interesting. I don't know enough about this era of graphics cards to made a good guess at how they genlocked the output. Modern cards render to a frame buffer, then an output chip generates the video signal. I'm pretty sure there have a separate clock for the output (esp. for modern cards, since the core clock is actually variable), which would make the mod pretty trivial. (Which is also kind of a moot point since iirc modern productions replace screens in post anyway) I've also taken a deep dive on the NES's output chip recently, which would be hell to try modding. I believe these cards would be closer to modern cards (iirc they have some kind of frame buffer).