Відео

Yes it is. Remember that this is no substitute for proper medical diagnosis -- it's for entertainment only! If you think you have a health issue, please see an actual medical doctor.

This is not the big deal that people make it out to be, for several reasons. Nearly all refrigerants can be ignited and many will decompose into very toxic gases if that happens. Whether charged with conventional or flammable refrigerant, these devices use only a few ounces at most. The average disposable lighter contains more liquid (and in some cases, it's the same stuff -- isobutane).

I don't know, and as this was done only out of curiosity, I have no plan to test it and see.

It's come to the point where I've forgotten a lot of the details in my back catalogue of videos, so I had to rewatch this one. "Commotion" is probably a bit of a strong word. It was meant as good natured hassling between siblings, especially as I was the one who recorded his commentary and it appeared in the finished video.

I forgot all about it. It is rather unlikely at this point that I will revisit the subject, at least for the foreseeable future. (The computer I had planned to use for this demonstration needed to be cleaned up after a basement flood. I did that, but I haven't put it all the way back together.)

@@uxwbillWell hey, more than anything, I just wanted you to know how formative of a memory this video is for me. I must’ve been in middle school at the latest when I watched it, and now I’m out of college and working as a systems administrator for a small company. Still into old PC stuff, too!

I'm glad the video was a formative moment for you, and I also appreciate that you've been watching over the years. To try and give some sense of closure, while seeing how badly I remember what's in this video already...the story basically goes that external cache management on the Pentium Overdrive was a mess. Intel reportedly kept changing the specifications while manufacturers were bringing hardware to market. Write-through caching generally worked fine with the Pentium Overdrive. If your system supported and used write-back caching, that's where things could get really interesting. Some systems would run perfectly no matter how things were set up. Others were stable until you did some very specific thing and then the whole shebang fell down. The remainder of systems were unstable no matter what you did to try and get it working. You could see all of these outcomes even across multiple examples of the same hardware, with the same BIOS revision and the same software stack. I did! I had several identical "Lacuna" PS/2 Model 77 systems with POD CPU upgrades. Of these, one worked perfectly no matter what. The other would crash only running the reference disk or system configuration programs. I believe it failed with a "217" error code, which sometimes it would not do until after leaving the configuration programs and rebooting. The last example just crashed constantly if one dared to run a POD CPU and cache model in write-back mode. It was uselessly unstable. I believe I was going to demonstrate these on video, and compare them to an HP Vectra XA with a POD83 and 256KB write-back cache module. Could there have been some kind of difference in chip revisions that wasn't readily obvious? Absolutely. (I have a "Lacuna" board PS/2 Model 76 whose S3 graphics chip is marked as a prototype. That S3 graphics chip is also another case of a component being stitched into a design with a really hot needle. It was designed for VL-bus or PCI systems, but IBM put it in a Microchannel bus computer. Some of the resources used by that S3 chip also occupy those used by other hardware in the system, such as COM4. There were also timing problems that IBM tried to solve with numerous graphics driver releases, particularly under OS/2. They also tried different RAMDACs to resolve the issue.) While not really a fault, cache memories took on all manner of different package types and layouts...various vaguely SIMM shaped modules, plug in modules, and even loose chips for direct insertion to sockets. I'm sure some manufacturers did a better job of their board layouts, and that some cache controllers were better than others. I think that should cover it, unless of course, I've forgotten some detail or another. That's certainly possible.

@@uxwbillThank you! I’m glad to finally know the story. :) I think I once tried to research the topic a bit myself, but finding any amount of useful info on the web, especially obscure content from decades ago, has become increasingly difficult lately. Your anecdotes are far more informative than most of the crap I tend to find on the web these days.

It won't be too many more years until I've been on this site for twenty years!

Not my machines, not my choice.

@@uxwbill What kind are they?

It's not always the best technology that wins the war. I'm also not aware of any consumer oriented UPS that is of a double conversion design.

I prefer the big name vendors. One never knows to what stresses a self built system was subjected during its assembly. Sometimes people would use the cheapest and most awful cases, expansion cards, power supplies or even motherboards. Big name manufacturers have had their share of foibles, but in general, they used good quality parts and usually got them put together properly.

@@uxwbill I would say I agree with you. I like systems where all of the I/O ports are just integrated onto the motherboard and I don't have to worry about breaking out headers or using super I/O cards.

It could be as simple as a burnt out light bulb. I don't have in depth knowledge of how the economy light circuit works, and I'm not sure I have the factory service manual any longer.

I don't really have any idea what to tell you. Numerous vendors sell this leak detector. If you don't want one, or don't like it...don't buy it?

Yes.

@@uxwbill cant believe how long its been since i subscribed to you when u did ur old cold forgotten buick video! its nice to see your still doing the videos!

I don't recall asking you, but thanks for stopping by and offering your opinion on the matter!

UA-cam remains something I do solely for fun. I don't consider this video to be a vlog, though.

He can borrow all sorts of interesting machinery. I'm not sure what you're asking about with regard to storm drains. Some years ago, the city finally came through (far too late, but still) and separated both the storm and sanitary sewer. This is great, except for the inlet grilles having large enough gaps that raccoons can (and do!) live in the pipes!

Pretty much!

No. I gave them to a local scrap collector. I don't care about the money. I just wanted these gone.