Never change the way you do your intro man. Simple. Right to the point. Love it.

I soldered new pick-ups on my guitar when I was a teenager without flux. It was a nightmare. All my solder joints looked like I globbed on mini art sculptures made of solder. My guitar had a hiss to it after that.

In my experience the yellow color usually comes from nicotine and probably other chemicals from smoking. I've had a few machines that were very yellow but when I washed them they went back to their original color. Those machines were in a place where they smoked pretty heavy.

These display were everywhere back in the 90's.

That monitor case looked like a pain to remove.

I like to leave a border on my CRTs (sometimes a relatively big one) since the images is typically better when it is more centered.

Have exactly the same machine (Model 30-286/1MB/30MB/Adlib/IBM 8514 CRT/same keyboard and mouse), bought it about 8 years ago as I had it in my childhood. Added an IIT 287 FPU, fixed Dallas with CR2032 on top :) Love your attitude and addiction, please keep doing all that you do, we need more retro tech videos :) Please cover a few more upgrades. Mainly, RAM upgrade (can't find 4MB SIMM modules that work in IBM, tried to fix some usual ones but with no luck). A CPU upgrade will be a good point too, I have Improve Technologies Make-it 486-286 (with Cyrix 486SLC+87SLC) but have not tried it yet.

I just buy the dallas chips brand new from either the mouse-based or the silicon-based electronics suppliers. Last one I ordered had a date code a couple of weeks prior to arrival, so they're definitely manufactured as and when required. They're a lot cheaper than buying a PCB, chip, and all the other parts to make one of those replacements. They last about 10-15 years, so I'm not too worried about not being able to simply change the battery when it runs out in a few years. I've got a pair of 8518s that I got half way through a tube swap before I found an issue with the replacement driver board. Having a pair of opening tools really helped, I made mine from extruded aluminium bar stock that I bought from the hardware store and filed down. Unfortunately the previous owner thought it would be a good idea to try prying the case open since they couldn't figure out how to open it, and left quite a lot of marks on the case. It was fine for the front half of the case since I could swap that with the other one, but my other rear case had broken plastic, so I had to re-use the one with the pry marks.

I had one of these as my first DOS PC when I was in high school. It was a nice machine.

What a nice machine! I knew PS/2 since the early 90s, but it took me until recently to realize that IBM had a very nice and timeless corporate design for the machines, the documentation, etc. They even have their own font (IBM Plex).

FYI, When I bought my Model 30 286 in 1989 I had to buy the mouse separately. IBM included the Model M keyboard but not the mouse. I ended up buying a Microsoft mouse based on the retailer’s experience with the IBM mouse.

I had one of this PS/2, the color monitor was amazing, kept using it until early 2000s when we finally bought a brand new computer. Thanks for sharing!

Great video as always...Looking forward to your next one about a new PC-Sprint!

0:42 - From what I've seen, 8086 equipped Model 30s have the red switch and plastic case (I own one), while the 286 Model 30s have the white switch and an all-metal case, that from the look of it I think it's the same of the PS2/55sx model, which is a 386 machine (and that I own too).

The red switch was used for an earlier version of the Model 30. White switches were used towards the end of it's run. I still have my 286 Model 30 (white switch) and it still works, including the hard drive and the color monitor-which looks as good as it did when I got it. Only thing I had to do was replace the floppy drive (capacitors disintegrated) and the Dallas battery, which I was able to find a new replacement for.

Love seeing @necro_ware on my other favorite KZfaq channels! Maybe some day you will find a Coleco Adam computer.

You’re a good luck charm. I’ve been looking for one of those 8515s for a while and when I saw this video I figured I’d check real quick again for one and scored one for under 100 bucks!

One thing that causes sector not found error is head movement motor axle that is dried out. Some lube there and got few drives working.

Nice work Epictronics, that worked out pretty well in the end. Also saw my name at the end there, glad to be a supporter!

that reminds me I still need to finish my PS/2! I think I don't want to deal with the rusted case - but the worst part, the PSU, is done and it's come up beautiful! Great nice monitor!

The first computers I can remember using were the Model 30 286's in my elementary school's computer lab. I've always had a soft spot for the machine ever since. I bought one for myself a while back complete with an original 8513 CRT and Model M keyboard. I ended up doing the battery hack on the Dallas chip to get mine working again. Currently I'm looking at possibly hacking or building some custom 1MB SIMMs since IBM used a nonstandard pinout on this machine and I could use more than 1MB total RAM.

I know its a bit of a sacrilege to purists, but i always liked the idea of slowly replacing every chip on the board with modern components which do the same work, but are engineered better. Not to say the OEM parts were trash, but there's just something to be said about a vintage computer that has another 25+ years of life added to it just because its components won't break down due to age alone... and it shaves off weight, which is always nice when you're trying to take it somewhere to show it to others.

I was about to say, it's a good idea to put Kapton on edge connecters if you solder nearby - lol -. Don't old PC have too much current draw for coin cells, ie, modern MB only have a 6uA current draw.

IBM PS2 is a best PC. For restoration too..

It's so satisfying and interesting to watch you fix and do thoughtful improvements on these machines. Even though my experience only goes back to the original Pentiums, it's still fun to see the very early ones get saved.. I'm pleased you mentioned focusing the monitor because it was a game changer for me to realize that was possible and simple. I went around focusing every friend's monitors after that. I found a screen filled with small text somehow easier than test patterns because all of the screen could not be focused evenly. I loved the Nokia test utilities, especially the one before what you used here. I have it somewhere if you want it.

Love that trick with the slot cover; nice work as always!

Oh i forgot, if you want to keep the floppy and donot need the data on it ( other than copy protected game or a floppy with laser dots or DRM protection ) , you can simply try and reformat the floppy, if it cannot hold a fresh format then it is unstable, granted you can use it with reduced capacity - bu tit depends on how the defect eg physical scratch or defective surface

Beautiful system!

Great video

Apart from the model 30 and model 25, I think there's one other computer model that uses drives like these, though I can't recall who made it. I want to say Epson, but I'm not sure. IBM being IBM, it is a bespoke interface, but based on what I've read, it is XT-IDE. Which to me poses an interesting experiment. For model 30 and model 25 owners that can't get a hold a functioning compatible hard drive, the interface on the motherboard exposes only the pins on the ISA bus that the drive needs. While you can connect an XT-IDE to the ISA slots on the motherboard, why not make an XT-IDE card that plugs into the hard drive header on the motherboard. Unless I'm completely wrong, it should work, and keep the slots free for other cards.

Nice machine, I've repaired one of those last year. Model 30 286 could be upgraded to 4mb of RAM (or maybe even 5mb) with proprietary IBM memory modules, and I am currently in a process of revers-engineering them and making new ones (waiting for test PCBs to arrive). Although 1mb is enough for 286, it still could be fun to have more. Integrated video on these machine is really slow (it's connected via 8bit bus instead of 16-bit), so separate videocard is advised. And only 3 ISA slots are a pain. Also CPU probably could be upgraded with a change of crystal oscillator.

There are new dallas chips on mouser for those who do not want to build one.

Yellow mess inside OCs is usually Cigarette smoke

7:30 If you bought those chips from the bay and they came from China that's _normal_ hehe! If you got them from Mouser etc then they would have been packaged more thoroughly and they should have perfectly aligned legs.

I had the 8086 Model 30 as one of my first computers, and I loved that thing. The only thing I would have changed would be the hard drive, as it was quite slow, even for its time. Later I came to find that they could be very unreliable, although I don't remember my own having problems. I'd love to have any of the original PS/2 line right now.

That brown stuff inside was very likely just cigarette tar.

I think the white switch is for the 286 model 30. The red switch is on the 8086 ones. I've got the lesser red switch version.

A replacement Dallas (the 12887+) and already flat? :o

Could the yellow stuff be nicotine? I once looked at a flat where the previous renter smoked for yeeears and the walls were yellow from all the nicotine that stuck to them, you could see where every frame had been on the walls.

Cool machine Roman 👌 Did you know you can overclock these machines quite easily? Mine was overclocked to 16.5MHz with an AMD 286-16 CPU but I had to disable the parity controller to do so as it couldn't keep up. I later installed one of those Kingston 386 upgrades with cache, an XT-IDE, a sound card and a fast Tseng ISA graphics card and some home made memory modules to max out its planar memory to 4 megs and it now runs DooM quite nicely.. A Model 30 running DooM and Windows 95 😂

pretty sure my highschool had these in the library. for a little while id skip classes to play ega trek from a bootable floppy

I have the same problem with the floppy drive in my Model 30-286. It can boot from floppies no problem. It can read and write no problem. But if it tries to execute a program from the floppy drive within DOS, the heads start seeking weirdly and fail. We are both using version 6.22. Starting to wonder if that newer version of DOS has some sort of strange incompatibility.

Hah, exact same model of PC of the first PC I have ever used! (Before I got an XT myself, somewhat disappointing as it also was Hercules and this one even though it was black and white it was VGA, so grayscale)

How can a chip made in 1995 be "Brand new"?

Hi, floppies have a mind of there own I did have up to 2018 my collection of @ 300 ranging from c64 - Amiga - PC ( 5.25 + 3.5 ) I found the older brand names, Verbatim, 3M, Kodak, Datalife, BASF were the better ones Ironically the double density were more stable ( was it due to OEM specs and a wider read/write head compared to the thinner quad density ?? ) Very late 5.25's in the cheap LeFloppy were unstable Early 3.5 in 720 double density, most were good, quality 1.44 were ok, but almost every one of the cheaper ones made from say Pentium 1 or Pentium 2 era were very shoddy The same applies to burned at home cdroms, the early ones are fine, the later ones all have cd-rom rot - they donot de-laminate ( none that i have ) buy the inner reflective sector goes of colour , it looks like ink blots - and they either donot load of copy part way then are unreadable - i find this strange as the outer edge of the cdrom is what is failing, hte inner section looks fine, and partially written cdroms are written from the inner most sector and fill going outwards I did in @ 1997 archive everything floppy onto various cdroms, every important floppy i used a dos program called DCF ( disc copy fast ) this makes imaged from floppies - similar in concept to ISO and this is what i use to restore floppies - except many are backed up on now damaged cdroms The brightly coloured 3.5's are strange, new from box i have working , in both quiet and super noisy on the same machine - my son had a few for school i think 4 or 5 different coloured ones for homework - now, often they ended up in his school trousers and were washed !! they orange or yellow one worked even after a few washes , others did not - they were all out of the same box new Most times the magnetic field goes week, they need to be re-read to sort of i dont know recharge them The same with my back up ide external hard drives - i have 4 or 5 older usb 2 external drives under 512G - i try every 6 months to take them out of the cupboard and try and read them, some times i move files around to other directories just to see if there are any read errors, the read/write helps keep them fresh - i need to go to the P2 computer as it has a programs that is used to review archived files stability - a sort of defrag / speed disk for NTFS that hard drive program is called Disk Fresh from puransoftware.com - i have no affiliation with them other than using the product for 5 to 6 years

I hope that yellow dust isn't uranium powder.

This PC should run PC-DOS ... not that other DOS ;-)

Hello. May I ask an advice? bought an IBM 8513 and it has greenish picture. Is this caps or something else? cord looks fine

Why not use a new old stock DS12C887 chip? 🙂🤷‍♂️

handy man👉

Mine has a white switch too...

The yellow/brown stuff is usually nicotine and tar 😕

That hard drive has more caps on the board… if it fails again replace them also…

28:28 Why isn't that the Gold version? tsk tsk tsk ;-)

bend leg LOL look like they drop it so hard cause legs to bend lol it just make me laughing so hard and diskettes drive need be moving alot in order fix it self because it sat too long without moving can leads to it not working oh oh oh yahh i remember now back in old day tv show dad sit on chair watching son stick fort in outlets and mom show up say dont do that son and dad say whoa let him do it (zappped) dad say well that when you learn not do something aging LOL that got me to remember dont mess with monitors without skills and tools