@@tony359 rubbing alcohol can be either denatured ethanol or isopropyl alcohol depending on the supplier. Methylated spirits is always ethanol (with a bit of dye and bitterant - and sometimes methanol)
I took a model 80 and went full absurdity with it. It was one of the most fun I have had with a retro project. I ended up putting in a 4 MB planar memory card and 2 microchannel memory expansions with 12 MB installed total to get 16 MB RAM. The hard drive was completely dead (of course) so I removed the old MFM card and put in an Adaptec AHA-1640 in its place. I also added a SCSI CD-ROM drive in the 5 1/4 bay with some 3d-printed rails so it fit in the hard drive area. For the front bezel, I used the panel IBM supplied for installing a 5 1/4" floppy drive.in the PS/2 80 series. In order to get it to fit the bezel properly, i had to install the rails upside-down on the CD drive, but it was a perfect fit otherwise. Video was upgraded with a Microchannel XGA-2 card. Network adapter is a Microsoft LAN Adapter/A for Ethernet I topped it off with a blue lightning 486slc33/66 upgrade, so this is probably one of the fastest model 80's in existence without a Reply motherboard replacement. The only non-period-accurate parts I have in it are the hard drive and sound card. Instead of sourcing the proper hard drive, I went with a bluescsi. I did not want to constantly worry about an old hard drive failing I also used a modern re-creation of the Sound Blasted MCV called the Resound New Wave MCA for the sound card
I also went a bit crazy with the software. Of course, it has MS-DOS 6.22 and Windows 3.1, but I also have Windows 95 and OS/2 4.0 installed in a multiple boot configuration, using OS/2's boot menu. Windows 95 is surprisingly (almost) usable on it. As is OS/2, probably because of the processor upgrade. I have yet to find an MS-DOS game that does not work on this system, including some that are known to be problematic on MCA PS/2s. I never expected this to become my primary MS-DOS gaming machine, but with judicious usage of the SLOWDOWN app for older games, it is almost perfect.
I don't have experience with the blue lightning, but tried variants of the TI486DLC in various PS/2's and always ran into trouble with the L1 cache, which would cause frequent system freezes. Did you run into this? If you use it, could you share your 'cyrix.exe' configuration string?
@@clavius5734 I have the official "Options by IBM" 486DLC33/66 upgrade. More information is available from the "Ardent Tool of Capitalism" site - an excellent reference for the PS'2 series. Search for FRU "13H6698." It appears that any time I put the direct link in, UA-cam "eats" my reply. Regarding freezes and instability: performance is rock-solid and approximates a 50 max 486 DX, according to my testing. I also have a 25 mhz 80387 installed, as the upgrade doesn't have an integrated math coprocessor. The only real issue I had was the installation of OS2. The boot disks would not work if the cache was enabled. This was a known issue and described in the documentation. After OS/2 was installed, I re-enabled the cache and everything was stable
PS/2s are so cool, especially when you think about how much these things cost when they were new. I have a Model 60 that I got a few years ago which is very, very similar to the Model 80 but it is rocking a 286 processor. It took quite a while and a complete tear-down to clean up all the deteriorated foam from inside it.
Watching your process to clean up that foam gave me flashbacks to my old Antec Sonata mid-tower case. It was a pretty quiet build in 2003 but I wanted to make it even more quiet and installed an after-market sound deadening kit consisting of enough rubber+foam cutouts to cover the entire inside surface. When the foam turned back into dino poo, I spent hours scraping and peeling sticky, gooey and dusty foam off of the inside. I considered condemning that case multiple times during the journey and it still smells like Goo Gone whenever I fire up that system. Nice video! I've got a special spot for desktop cases but a very close second are these full towers.
All that mess, and here I am wondering if solid sheets of cardboard (the stuff with a wave sheet glued to two flat sheets) would have done a comparable job.
The 8580 was overpriced, overbuilt, and over the top. I love it. One of my favorite PS/2 machines. I've found an easy way to remove the foam is with an old flat scraper, and acetone to clean up the mess. The foam was for sound deadening, the full height hard drives were noisy (and HEAVY!). These were the pinnacle of 80386 technology, nothing but the best in these since they were the big professional workstation or small server solution of the PS/2 line. That power supply is interesting. Never heard of that one before, all of the ones i've ever worked on or owned were all Astec supplies. Those just have a zip tie on them for the "handle" to remove them. These were never meant to be serviced in the field, you just swap the PSU out and send the old one back to IBM for refurbishment. They loved the security torx screws to keep fingers out of the high voltage area. the 8580 was in production for so long that it is one of the few PS/2 machiens that actually got upgrades over its lifetime. From 16 to 20 to 25MHz and 3 different board designs. The Type 3 board can use 2mb or 4mb modules as long as they are 80ns or faster. The OG memory modules were 120ns, the 25MHz machine needed the faster modules for reliable operation, and those were more readilly available when this machine came out in 1989. I need to dig my 8580 out one of these days. I have a Reply planar to install into it that will give it a 486 and more up to date upgrades like 72pin SIMMs and XGA video onboard.
Thanks for letting me live vicariously through your eyes lol. The Model 80 has been a holy grail since I worked on them back in the late 80s-90s. They truly are IBM's Crown of Creation in the PS/2 line, and we sold them almost exclusively as servers, although a few did go to the big wigs at various major reinsurance companies. They would have been insanely expensive for an individual to buy as we live on an island, where everything cost at least two to three times the US price. Now, some technical things I seem to remember. The hard drive cage, in the systems I worked on, was usually populated by full-height SCSI drives, of about 60MB. I remember they used to make this loud pinging sound as if a metal arm was bouncing off of something, something I never figured out lol. Great work, man!
I love my model 80. Had one in college in the early 90's as a replacement for my really slow PS/2 55sx. I just had to get one for my my modern office. The foam was horrible to remove and as pieces flaked off they would stick to the carpet and stain it. In the end I had to use brake cleaner on paper towels to get it out of my case. To try and get the most life out of the model 80 as possible I used my thermal camera to find hot chips on the motherboard and MCA cards. I then added stick on heatsinks to those hot components to keep them cool. Looking forward to your next video in the model 80.
Thank you your post! I got a 8565 386SX recently and I feel your pain removing all the nasty stuff. I have been there also. I am new in the PS/2 world and all your advice, experience is a goldmine for me. The PCB's building quality and complexity is amazing, comparing to the noname ISA 386 MBs. Still I have the 161, 163 code, it is time to write the reference disk to move forward. I hope my floppy drive works! Keep posting please!
Successfully restored my 8565! Concerning the floppy rive I preemptive replaced the capacitors usually go bad, cleaned and greased and it is working now. Creating a reference disk and running the config program removed the error messages. Next task was the memory upgrade which was really challenging. My config was 2x2MB on the MB and 3x2MB on the memory expansion card. I tried to max the total memory config but faced the usually problem: IBM uses parity FPM memory with IBM coding on the pin detection pins of the FPM modules. Tried to source locally 4MB modules without success. Using non IBM 4MB parity modules gave me 1MB on the post which was strange. Finally figured out: the noname memory module I used was 4MB installed on on side, empty but expandeable on the other side. RAS0, RAS2 was used for the one side 2x2MB banks. I suspect because the RAS was not continuous, like RAS0, RAS1 the system counted only the first megabyte assuming there is no more. I used 1Mx4 chips desoldered from an another module and soldered them to the back of the two FPM parity memory modules. I was lucky because this module has a parity chip able to deal with 8MB of installed memory. I coded the pin detection according to the IBM coding schema of 4MB 80ns, ie. all the four pin detection inputs are grounded. At the first start it gave me 000000 code but after restarting the memory upgrade worked showing 8MB of the installed 16MB on the MB. I think this comes from the MB design, one half of the adressable memory is on the MB and one half in the expansion board. One of the not used 2MB module from the MB went to the expansion card, resulting the maximum 16MB of memory. Next project will be to dealing with the SCSI HDD which is rapidly failing.
Your comment at 19:40 made me experience once of those spooky moments. Back in 1989 I was also a long-term Commodore 64 user and the PC computer I was using back then in my first job was also am IBM Model PS2/50z. It had a "massive" 20 Megabyte Hard Drive and one 3.5 inch floppy drive and it was running dos 3.3 with the Lotus Elite Software Suite (Word Processor, Spreadsheet and Database all in one package). I still have the original disks somewhere:) We managed to get a version of Castle Wolfenstein working on it at a reasonable frame-rate as well ;) I also remember we had a huge Monochrome Laser Printer but I can't remember the model, it took up half the desk space it was so large and it took two people to lift it. Thanks for bringing back the memories, this is a great restoration video and it is good to see another PS2 being brought back to life, I share your fondness for this line of IBM machines ;)
The company my father worked for gave us an IBM ps/2 model 80 as a work from home computer way back in the day. I remember it had a red switch on it, so I do not blame you for changing that out! heheh. wish I still had that computer.
There’s a medical product called Remove. It is a bandage adhesive remover and it works on just about everything with almost zero effort. If you can get some of that it might save you tons of time cleaning stuff like this. It comes in individually wrapped square swabs.
The melted foam was called "black cheese" at the shop where I worked in the 1990s. Whenever we encountered "black cheese" we used IPA, denatured alcohol, acetone, "Goo Gone Original" and WD-40 in succession until we found a solution that would work. Most cases were metal in those days, so I am not sure how any of those would work on plastic cases.
I think the answer to mounting the big fan is just to bend yourself a giant spring clip from metal sheet, screw the fan to that, and press into that hole in the shroud. Should be possible to find in your local hardware store. Steel is ideal, but aluminum flashing might work ok. Try to get slightly curved bends instead of sharp ones. To figure out the right shape, try to use some thicker than normal paper (such as card stock, the stuff that greeting cards are made of), and test the general shape with that to get an outline. Remember to file down the edges with your dremel after cutting. You'll want sheet metal shears for the actual cutting.
Looks like an Alien chestburster lost his skin @23:00 👽. Leaving behind a few annoying remnants for posterity. I really admire your patience with this one here.
I remember back in high school in the early to mid 90s our computer classroom had one of those in it. It was definitely a 386 and all the pcs were IMB 286 systems with monitors, oh I guess there were 20 total plus the server, as it were. In middle school (a wing off the high school, I am from a very small town back then with its own school district) anyway, I remember there were really only a few of us my age (7th grade maybe?) who really knew computers well, one of us ran a BBS in town, it was a good time, but anyway we used to go in there when we could and mess around, it was so easy to get into all the teacher's accounts, there were drives partitioned down to zz (it was great) so every teacher had their own drive letter, anyway I'm babbling, but I remember this system very well.. good times back in the 90s, we will never get those days back. Technology was moving SO fast back then!! edit: oh it's good to hear you said the history of these towers, how they actually were workstations, but a lot of places implemented them as servers in the time.. exactly as our school did. Also, I am sure ours had a red switch. But I also thought the IBM badge was blue with white IBM letters, I may be mistaken, but my memory shows that. Thanks for the wonderful trip to my past, as you always give me..
Thanks. We only had one PS/2 Model 30 8086 at school. I had a lot of fun playing with some early version of CAD. I need to figure out what version it was and install a copy on my Model 30 in some future video. And yes, there were Model 80s sold with red switches. I don't know why they changed to white switches
33:00 That chip can be fixed easily. Carefully and slowly grind away the plastic at that point to reveal the leg and attached a tiny wire from that stub to the PCB.
The original switch, or at least one that seems to match a lot better than your one, was an Arrow 93RP4040B103K. I've checked it against my PS/2s and it's almost a perfect match in terms of the paddle width and thickness (although the length may be a mm or two shorter), as well as the mounting bracket. If anyone's looking for one, there's currently a vendor on the electronic bay website selling 12 packs, although they've only got a couple of lots left as of right ... now.
A suggestion for the sticky foam: Gasoline. It's safe on plastic and can dissolve many types of adhesives. It also liquefies polystyrene, so if you ever have issues of old pvc cabling that has "melted" into the styrofoam packaging like with some Model M and Model F keyboards I've seen on the channel in the past, gasoline will clean it up faster than anything else.
Gasoline is extremely flammable and very stinky, a very poor choice to use in an enclosed area. A much better choice is a solvent-based lubricant, like WD40
@@ouch1011 Looks like someone has never used Denatured Alcohol or Acetone. Both very flammable and foul smelling, but common in applications such as these. Gasoline is simply more effective. And speaking of flammable and stinky, have you ever actually used WD40? It's also both of those things. There's no need to be alarmist over nothing.
@@Darxide23 WD40 is flammable as an aerosol, very hard to light as a fluid. Gas and WD40 have worked well for me in the past but i don't use gasoline indoors.
If anyone does actually use gasoline, please get some other hydrocarbon liquid to wash it off _before_ it dries, and if possible make certain to use camping stove "white gas" instead of automotive fuel. Automotive fuel has all sorts of additives to optimize it for it's intended use, and the manufacturers don't publicize their recipes, and frequently change them because of seasons, regulations, supply prices, etc., leaving a big question about what's inside on a week-to-week basis.
The thing to use to remove that old foam is Goo Gone. We have it in the USA. As a backup I will go for some WD-40 it works but not quite a good a Goo Gone.
hi! i can't believe you just swap the schrack power supply for some generic one.... Schrack is very big company in Europe, that makes most reliable industrial electronics today....and, to be honest i also had no idea that they ware making power supplies back then... but that power supply is a gem, and if it's original to that system (and works properly) - you should keep it that way! thanks for the video, cheers mate!
Totally agree with the decision about the power switch. A PS/2 w/ a white switch just seems weird. As a teenager I had a summer job cleaning up drug stores in the early 90s in Vancouver, Canada, and I remember there would invariably be a Model 80 in the back office. Usually they would be hooked up to a tractor feed printer and an X.25 packet network (Datapac) to talk back to the central office.
@5:54 - Later Model 80 cases removed the edge-connect assembly at the back of the diskette drive cage, and switched to the "small button" 34-pin connect drives. The back rotating 'T' foot was also replaced with just a heel. I'm not sure where exactly in the lifecycle where those changes occurred, but you might be able to narrow down the production date (and manufacturing location) by the serial number.
The newest chip on my board is manufactured in week 11 of 1992. It seems to be easier to find a cover for an edge connector drive than one of the "new" drives. I think I'll go with whichever I can find first for this build
45:06 - The drive cage wasn't changed, just the rear edge-connect retainer; You can see the side cut away for the 4869-001 bay adapter pass-through cable.
@@IBM_Museum Yeah, I forgot to mention that in the video. I read that on Ardent while recording. Maybe there was an issue with the manufacturer of the red switches?
That foam goo will come off with an oily solvent like mineral terpentine or white spirits. Possibly WD40, or a label and glue remover like GlueGone too.
Next time try nitro thinner or acetone! Ipa is not as good in breaking glue. But you should be very careful on plastic. Also, the used lithium battery isn't prone to fail cataatrophic like ordinary NiCD. So systens with this battery type should generally be much safer.
Love it - really great to see your restoration, "it has to have a red switch" yes I agree! 😂 I worked with numerous Model 80s in the nineties, running Netware (and Lotus Domino under Netware) on Token Ring networks. I think we even had an LU6.2 link between HO sites, to support replication between Domino servers - very exciting. These were the days when departments shared printers, hanging off these servers. Backup systems were a pain, as they always are. Maybe that's one possible idea, to get an ArcServe config up and going? Or if you could get hold of media for Netware .. that would be something - a Model 80 in its element? :)
The closest I've been to having an IBM is a lenovo laptop. It was my first 2in1. I got it in 2014. I've never really thought genuine IBMs were worth the cost, at least not back in the day. I get it for retro purposes though.
I had to put a foam pad in my i7-4770 to make it quiet, because I bought some old DDR3 RAM with plasma tubes that buzz all the time - lol -. The plasma tubes look amazing, but you can hear them buzzing when I try to record my YT vids, ie, I should really cut their power supply.
The "higher end" and newer machines had white switches, as i remember We had a Model 80 very early, it had written on Model 80, not 81 and hat a red power-switch
In the U.S. market, a white PS/2 switch means the upper-level model of that case style (because it can also mean a higher wattage PSU). But it was rather mixed in the European region. One false story is that the switch (no pun intended) from red to white was because of some European requirement (without ever mentioning the country/countries).
@@Epictronics1 Personally I think the red switch on such an expensive machine looks tacky and cheap. The creme/white switch is there for a reason, to convey it's an expensive high end computer. It's like someone with plenty of money buying a mahogany and leather lounge just because they have money to burn. It doesn't need to be expensive solid wood and high end leather but they want to show they are rich. The white switch shows classic subtle elegance and style. Red switches were only used on low-end cheaper store bought off-the-shelf models and you've ruined it. You should put the original white switch back in before anyone notices and cut that section out of the video quickly before the high-end PS2 Switch Police come looking for you ;-)
You're not kidding about the fragile ribbon cable to the heads. I once sneezed while working on one. It's now a parts drive. Just as well. It takes about 1.2 of those to make 1.0 working one.
@@Epictronics1 I briefly considered doing that as well. I had my doubts whether the plastic head assembly would withstand the attempt, and whether I would be able to pull it off with disassembling things and then re-aligning the heads afterward. So I left it in my parts bin, just in case I need donor heads some day and get desperate enough to try.
@@nickwallette6201 The repair looked all good, so I don't understand why it didn't work. It's been many years, so maybe I should pull it out and have another go
In my uneducated opinion, I think they put those foam pads in strategic positions (via trial and error) to prevent resonance, the case suddenly getting unpleasently loud.
You might want use IPA to "soak" the sticky and gooey spots, let the alcohol work for a couple of minutes, before scraping. Time is a factor in chemistry. You could for exampe use a piece of cloth or a sponge soaked in IPA and put it on the spots where liquid would simply run off.
I never ran into the model 80's as workstations always as servers due to the "large" number of scsi drives you could cram in them and have a tape backup drive. I also remember the floppy drive cage with edge connectors but I only serviced a hand full of these over the years. Not being an IBM official service rep getting parts, manuals and setup disks were always a huge pain in the ass.
One opinion here, NOW is a good time to replace ANY caps - especially surface mount - on ANY device you cherish from the late 80s early 90s, really up until the 2000s or so.. they used SUCH JUNK back in the early 90s, it was just terrible.. really, if you're watching this channel and you have any interest at all in preserving our history, please learn to desolder, to use good flux and wic, then to re-solder. It's fun and very rewarding when done right and (well used to be) caps really aren't very expensive. You can practice on old electronics that are trash, then fix up your old PC parts and renew their lives!!
I ordered one of these around 1989 at work to run a relational database system and to run the associated remote data capture system. Eventually it was replaced so I brought it home. After I retired I tried to sell it but there was no interest at all and several PS/2 systems had been on ebay with no interest. I tried firing it up and it POSTed but wouldn't run. So I had to scrap it. It's such a shame. About a year after I started using it at work I installed a Novell network but that didn't work. We contacted IBM and under our corporate maintenance contract their engineer came and swapped out the motherboard. Apparently an I/O or DMA line was missing in the early design
@@Epictronics1 I wish I hadn't thrown away all of the computers that we used and then replaced at work. We did have a scheme for some that sent some PCs to Africa but that didn't stop many computers being put in the recycling pile
For the rotten foam residue, have you tried WD40 or Acetone? I've had good results using WD40, just let it soak a bit. You need a petroleum solvent for petroleum residue so water or alcohol based solvents won't work.
@@Epictronics1 Worked best for me for the glue that remains. Should be no need to scrape, just wipe off after it has soaked in the WD40 for a good while. It's akin to that commercial product "Goo-Be-Gone", but I think a bit more effective. Don't use acetone on plastic parts however, they'll dissolve :)
MXR and DOD effects pedals from the 70s and 80s also have this obnoxious petroleum based foam in them, on metal parts you can use acetone to remove it cleanly. If it's in contact with other metal parts that are not painted it will cause them to corrode, very awful stuff.
ah those disgusting foam pads!! Did you try WD40 to peel stickers off? Might take a bit more than a couple of minutes but if they're made of paper, they'll come off easily. And yes, an IBM must have an orange switch! And of course there's a dremel in action, it's an IBM video! ;)
You probably need to do a head alignment. If that doesn't work, you can install a standard drive with an adapter. I have a very old and crappy video on how to do the head alignment. Try not to laugh lol ua-cam.com/video/fV2x4SY1EXk/v-deo.htmlsi=kkwn8dCc8c7DoPrd
another great video. But i have to disagree with the red switch. Red ones were only on the first lot of PS2 ie 30 8086 and others from that era. They swapped to white for the later machines
It is really no point in using both IPA and denatured alcohol as solvent because those are both alcohol and works in similar ways. I'd recommend petrol/diesel instead, as alcohol is polar solvent and petrol is non-polar. For cleaning this sticky rubber, I'd suggest a knife that is being used to clean ceramic stoves.
I avoid the MCA PS/2 models like the plague. I don't mind the tech behind MCA, but the fact that there are almost no cards available, makes me not be very excited about those models. The PS/2 machines with ISA bus are far more collectible.
I dont think missing a bonding and grounding check will kill too many peiple unless the plane is stuck by lightning and the wings catch fire. Ok never mind.
I worked in IBM mainframe late 80s then moved to PC services early 90s. We had IBM PS2s and also other brand PCs like Compaq and Elonex. The IBM PCs reeked quality, they felt well made and like they would last lifetime…they felt like real IBM computers. Compaq came a very close second but the Elonex felt like cheap disposable rubbish by comparison.
It seems they actually are going to last a lifetime! I'm still having fun with my 1983 IBM PC :) I worked with Compaqs back in the early 2000s. They were nice, but no way near as good as IBMs
For those in the UK. Denatured alcohol is methylated spirit.
Excellent
for those in poland it’s „denaturat”, also called „jagodziana na kościach”, or something like ‚bone blueberry wine’ due to color and jolly roger sign
AKA "rubbing alcohol"?
@@tony359 rubbing alcohol can be either denatured ethanol or isopropyl alcohol depending on the supplier. Methylated spirits is always ethanol (with a bit of dye and bitterant - and sometimes methanol)
@@TheaH2O2 ah, thanks for that!
I took a model 80 and went full absurdity with it. It was one of the most fun I have had with a retro project.
I ended up putting in a 4 MB planar memory card and 2 microchannel memory expansions with 12 MB installed total to get 16 MB RAM. The hard drive was completely dead (of course) so I removed the old MFM card and put in an Adaptec AHA-1640 in its place. I also added a SCSI CD-ROM drive in the 5 1/4 bay with some 3d-printed rails so it fit in the hard drive area. For the front bezel, I used the panel IBM supplied for installing a 5 1/4" floppy drive.in the PS/2 80 series. In order to get it to fit the bezel properly, i had to install the rails upside-down on the CD drive, but it was a perfect fit otherwise.
Video was upgraded with a Microchannel XGA-2 card.
Network adapter is a Microsoft LAN Adapter/A for Ethernet
I topped it off with a blue lightning 486slc33/66 upgrade, so this is probably one of the fastest model 80's in existence without a Reply motherboard replacement.
The only non-period-accurate parts I have in it are the hard drive and sound card.
Instead of sourcing the proper hard drive, I went with a bluescsi. I did not want to constantly worry about an old hard drive failing
I also used a modern re-creation of the Sound Blasted MCV called the Resound New Wave MCA for the sound card
I also went a bit crazy with the software. Of course, it has MS-DOS 6.22 and Windows 3.1, but I also have Windows 95 and OS/2 4.0 installed in a multiple boot configuration, using OS/2's boot menu. Windows 95 is surprisingly (almost) usable on it. As is OS/2, probably because of the processor upgrade.
I have yet to find an MS-DOS game that does not work on this system, including some that are known to be problematic on MCA PS/2s. I never expected this to become my primary MS-DOS gaming machine, but with judicious usage of the SLOWDOWN app for older games, it is almost perfect.
Great build! I have all the parts coming in next week to build an MCV replica card :)
I don't have experience with the blue lightning, but tried variants of the TI486DLC in various PS/2's and always ran into trouble with the L1 cache, which would cause frequent system freezes. Did you run into this? If you use it, could you share your 'cyrix.exe' configuration string?
@@clavius5734 I have the official "Options by IBM" 486DLC33/66 upgrade. More information is available from the "Ardent Tool of Capitalism" site - an excellent reference for the PS'2 series. Search for FRU "13H6698." It appears that any time I put the direct link in, UA-cam "eats" my reply.
Regarding freezes and instability: performance is rock-solid and approximates a 50 max 486 DX, according to my testing. I also have a 25 mhz 80387 installed, as the upgrade doesn't have an integrated math coprocessor. The only real issue I had was the installation of OS2. The boot disks would not work if the cache was enabled. This was a known issue and described in the documentation.
After OS/2 was installed, I re-enabled the cache and everything was stable
PS/2s are so cool, especially when you think about how much these things cost when they were new. I have a Model 60 that I got a few years ago which is very, very similar to the Model 80 but it is rocking a 286 processor. It took quite a while and a complete tear-down to clean up all the deteriorated foam from inside it.
My first Wintel PC back in the day was a 286 PS/2!
Shrack are a large manufacturer of industrial automation components. They're still in business today, most of what they make is switchgear and relays.
Schrack is a well known company in the industrial side of things, credited by producing the finest relays money can buy.
Watching your process to clean up that foam gave me flashbacks to my old Antec Sonata mid-tower case.
It was a pretty quiet build in 2003 but I wanted to make it even more quiet and installed an after-market sound deadening kit consisting of enough rubber+foam cutouts to cover the entire inside surface.
When the foam turned back into dino poo, I spent hours scraping and peeling sticky, gooey and dusty foam off of the inside. I considered condemning that case multiple times during the journey and it still smells like Goo Gone whenever I fire up that system.
Nice video! I've got a special spot for desktop cases but a very close second are these full towers.
Thanks! And holy crap, an entire case filled with that nasty stuff! It must have been a pain to remove :o
IBM also used the same foam on the big floor-standing printers to mute the noise - I've got a few units that I need to clean up and replace it.
All that mess, and here I am wondering if solid sheets of cardboard (the stuff with a wave sheet glued to two flat sheets) would have done a comparable job.
It pains me to think of a build in an Antec Sonata as a retro computer in need of restorative work. >
@@nickwallette6201 Indeed. >
The 8580 was overpriced, overbuilt, and over the top. I love it. One of my favorite PS/2 machines.
I've found an easy way to remove the foam is with an old flat scraper, and acetone to clean up the mess. The foam was for sound deadening, the full height hard drives were noisy (and HEAVY!). These were the pinnacle of 80386 technology, nothing but the best in these since they were the big professional workstation or small server solution of the PS/2 line.
That power supply is interesting. Never heard of that one before, all of the ones i've ever worked on or owned were all Astec supplies. Those just have a zip tie on them for the "handle" to remove them. These were never meant to be serviced in the field, you just swap the PSU out and send the old one back to IBM for refurbishment. They loved the security torx screws to keep fingers out of the high voltage area. the 8580 was in production for so long that it is one of the few PS/2 machiens that actually got upgrades over its lifetime. From 16 to 20 to 25MHz and 3 different board designs. The Type 3 board can use 2mb or 4mb modules as long as they are 80ns or faster. The OG memory modules were 120ns, the 25MHz machine needed the faster modules for reliable operation, and those were more readilly available when this machine came out in 1989.
I need to dig my 8580 out one of these days. I have a Reply planar to install into it that will give it a 486 and more up to date upgrades like 72pin SIMMs and XGA video onboard.
Thanks for letting me live vicariously through your eyes lol. The Model 80 has been a holy grail since I worked on them back in the late 80s-90s. They truly are IBM's Crown of Creation in the PS/2 line, and we sold them almost exclusively as servers, although a few did go to the big wigs at various major reinsurance companies. They would have been insanely expensive for an individual to buy as we live on an island, where everything cost at least two to three times the US price.
Now, some technical things I seem to remember. The hard drive cage, in the systems I worked on, was usually populated by full-height SCSI drives, of about 60MB. I remember they used to make this loud pinging sound as if a metal arm was bouncing off of something, something I never figured out lol.
Great work, man!
Thanks :) I wish I had one of those original full-height drives. They look great inside a Model 80
Great video as usual! The decomposed foam is hideous! I had fun clearing my Model 80! Also, for those in the UK we have a UK IBM Collectors Discord!
Also, type 3 board! Lovely!
I love my model 80. Had one in college in the early 90's as a replacement for my really slow PS/2 55sx. I just had to get one for my my modern office.
The foam was horrible to remove and as pieces flaked off they would stick to the carpet and stain it. In the end I had to use brake cleaner on paper towels to get it out of my case.
To try and get the most life out of the model 80 as possible I used my thermal camera to find hot chips on the motherboard and MCA cards. I then added stick on heatsinks to those hot components to keep them cool.
Looking forward to your next video in the model 80.
Brake cleaner? I'm gonna try that next time!
Careful with certain plastics and brake cleaner (same as carb. cleaner) can make plastics more brittle or bleach/etch/discolor them
Good point. On more sensitive areas I switched to an adhesive remover like Goo Gone.
Thank you your post! I got a 8565 386SX recently and I feel your pain removing all the nasty stuff. I have been there also. I am new in the PS/2 world and all your advice, experience is a goldmine for me. The PCB's building quality and complexity is amazing, comparing to the noname ISA 386 MBs. Still I have the 161, 163 code, it is time to write the reference disk to move forward. I hope my floppy drive works! Keep posting please!
Successfully restored my 8565! Concerning the floppy rive I preemptive replaced the capacitors usually go bad, cleaned and greased and it is working now. Creating a reference disk and running the config program removed the error messages. Next task was the memory upgrade which was really challenging. My config was 2x2MB on the MB and 3x2MB on the memory expansion card. I tried to max the total memory config but faced the usually problem: IBM uses parity FPM memory with IBM coding on the pin detection pins of the FPM modules. Tried to source locally 4MB modules without success. Using non IBM 4MB parity modules gave me 1MB on the post which was strange. Finally figured out: the noname memory module I used was 4MB installed on on side, empty but expandeable on the other side. RAS0, RAS2 was used for the one side 2x2MB banks. I suspect because the RAS was not continuous, like RAS0, RAS1 the system counted only the first megabyte assuming there is no more. I used 1Mx4 chips desoldered from an another module and soldered them to the back of the two FPM parity memory modules. I was lucky because this module has a parity chip able to deal with 8MB of installed memory. I coded the pin detection according to the IBM coding schema of 4MB 80ns, ie. all the four pin detection inputs are grounded. At the first start it gave me 000000 code but after restarting the memory upgrade worked showing 8MB of the installed 16MB on the MB. I think this comes from the MB design, one half of the adressable memory is on the MB and one half in the expansion board. One of the not used 2MB module from the MB went to the expansion card, resulting the maximum 16MB of memory. Next project will be to dealing with the SCSI HDD which is rapidly failing.
@@mihalym.6876 Very cool RAM hack! well done
Your comment at 19:40 made me experience once of those spooky moments. Back in 1989 I was also a long-term Commodore 64 user and the PC computer I was using back then in my first job was also am IBM Model PS2/50z. It had a "massive" 20 Megabyte Hard Drive and one 3.5 inch floppy drive and it was running dos 3.3 with the Lotus Elite Software Suite (Word Processor, Spreadsheet and Database all in one package). I still have the original disks somewhere:) We managed to get a version of Castle Wolfenstein working on it at a reasonable frame-rate as well ;)
I also remember we had a huge Monochrome Laser Printer but I can't remember the model, it took up half the desk space it was so large and it took two people to lift it.
Thanks for bringing back the memories, this is a great restoration video and it is good to see another PS2 being brought back to life, I share your fondness for this line of IBM machines ;)
Thanks. The C64 and the Model 50 are always going to be among my favorite vintage computers :)
The company my father worked for gave us an IBM ps/2 model 80 as a work from home computer way back in the day. I remember it had a red switch on it, so I do not blame you for changing that out! heheh. wish I still had that computer.
Also, when we moved one time the computer fell over and killed the hard drive LOL. They were very top heavy.
@@alk7934 Haha, yeah, I imagine many hard drives died that way in Model 80 lol
That's a very appealing computer for sure. I love the red switch too!
There’s a medical product called Remove. It is a bandage adhesive remover and it works on just about everything with almost zero effort. If you can get some of that it might save you tons of time cleaning stuff like this. It comes in individually wrapped square swabs.
I really love your restoration videos! Thank you.
Thanks :)
The melted foam was called "black cheese" at the shop where I worked in the 1990s. Whenever we encountered "black cheese" we used IPA, denatured alcohol, acetone, "Goo Gone Original" and WD-40 in succession until we found a solution that would work. Most cases were metal in those days, so I am not sure how any of those would work on plastic cases.
Black cheese. That is the perfect name for it :)
It's like foam sponge cake fresh from the oven.
I think the answer to mounting the big fan is just to bend yourself a giant spring clip from metal sheet, screw the fan to that, and press into that hole in the shroud. Should be possible to find in your local hardware store. Steel is ideal, but aluminum flashing might work ok. Try to get slightly curved bends instead of sharp ones. To figure out the right shape, try to use some thicker than normal paper (such as card stock, the stuff that greeting cards are made of), and test the general shape with that to get an outline. Remember to file down the edges with your dremel after cutting. You'll want sheet metal shears for the actual cutting.
Looks like an Alien chestburster lost his skin @23:00 👽. Leaving behind a few annoying remnants for posterity. I really admire your patience with this one here.
Thanks :)
Flashbacks of f cleaning the lack mystery foam surprise from PS/2s. The 80186 and 80286 models had way more foam and it t got all over everything.
I remember back in high school in the early to mid 90s our computer classroom had one of those in it. It was definitely a 386 and all the pcs were IMB 286 systems with monitors, oh I guess there were 20 total plus the server, as it were. In middle school (a wing off the high school, I am from a very small town back then with its own school district) anyway, I remember there were really only a few of us my age (7th grade maybe?) who really knew computers well, one of us ran a BBS in town, it was a good time, but anyway we used to go in there when we could and mess around, it was so easy to get into all the teacher's accounts, there were drives partitioned down to zz (it was great) so every teacher had their own drive letter, anyway I'm babbling, but I remember this system very well.. good times back in the 90s, we will never get those days back. Technology was moving SO fast back then!!
edit: oh it's good to hear you said the history of these towers, how they actually were workstations, but a lot of places implemented them as servers in the time.. exactly as our school did. Also, I am sure ours had a red switch. But I also thought the IBM badge was blue with white IBM letters, I may be mistaken, but my memory shows that. Thanks for the wonderful trip to my past, as you always give me..
Thanks. We only had one PS/2 Model 30 8086 at school. I had a lot of fun playing with some early version of CAD. I need to figure out what version it was and install a copy on my Model 30 in some future video. And yes, there were Model 80s sold with red switches. I don't know why they changed to white switches
33:00 That chip can be fixed easily. Carefully and slowly grind away the plastic at that point to reveal the leg and attached a tiny wire from that stub to the PCB.
I intend to try that in a follow up video :)
OMG, this thing is an absolute beast!
The original switch, or at least one that seems to match a lot better than your one, was an Arrow 93RP4040B103K. I've checked it against my PS/2s and it's almost a perfect match in terms of the paddle width and thickness (although the length may be a mm or two shorter), as well as the mounting bracket. If anyone's looking for one, there's currently a vendor on the electronic bay website selling 12 packs, although they've only got a couple of lots left as of right ... now.
Almost missed this comment! Now there is only one lot left :D Thanks for sharing!
A suggestion for the sticky foam: Gasoline. It's safe on plastic and can dissolve many types of adhesives. It also liquefies polystyrene, so if you ever have issues of old pvc cabling that has "melted" into the styrofoam packaging like with some Model M and Model F keyboards I've seen on the channel in the past, gasoline will clean it up faster than anything else.
Gasoline is extremely flammable and very stinky, a very poor choice to use in an enclosed area. A much better choice is a solvent-based lubricant, like WD40
@@ouch1011 Looks like someone has never used Denatured Alcohol or Acetone. Both very flammable and foul smelling, but common in applications such as these. Gasoline is simply more effective.
And speaking of flammable and stinky, have you ever actually used WD40? It's also both of those things. There's no need to be alarmist over nothing.
@@Darxide23 WD40 is flammable as an aerosol, very hard to light as a fluid. Gas and WD40 have worked well for me in the past but i don't use gasoline indoors.
@@Friddee Only lights in a vapor form? Hard to light as a fluid? You just described gasoline as well.
If anyone does actually use gasoline, please get some other hydrocarbon liquid to wash it off _before_ it dries, and if possible make certain to use camping stove "white gas" instead of automotive fuel. Automotive fuel has all sorts of additives to optimize it for it's intended use, and the manufacturers don't publicize their recipes, and frequently change them because of seasons, regulations, supply prices, etc., leaving a big question about what's inside on a week-to-week basis.
Red switch with a loud clack. Yep, that's what belongs in an IBM PS/2. ;)
It looks and feels just right :)
The thing to use to remove that old foam is Goo Gone. We have it in the USA. As a backup I will go for some WD-40 it works but not quite a good a Goo Gone.
hi! i can't believe you just swap the schrack power supply for some generic one....
Schrack is very big company in Europe, that makes most reliable industrial electronics today....and, to be honest i also had no idea that they ware making power supplies back then...
but that power supply is a gem, and if it's original to that system (and works properly) - you should keep it that way!
thanks for the video, cheers mate!
Thanks for sharing. Maybe, I'll swap back!
This mashine looks awesome! 😊
Agreed!
The state of that foam is repulsive, I certainly understand your sentiment!
That stuff was insane! It should not be legal to use lol
That's foam dust on the fan.. IBM was ahead of its time on everything but the foam. 😂😂😂
Totally agree with the decision about the power switch. A PS/2 w/ a white switch just seems weird.
As a teenager I had a summer job cleaning up drug stores in the early 90s in Vancouver, Canada, and I remember there would invariably be a Model 80 in the back office. Usually they would be hooked up to a tractor feed printer and an X.25 packet network (Datapac) to talk back to the central office.
@5:54 - Later Model 80 cases removed the edge-connect assembly at the back of the diskette drive cage, and switched to the "small button" 34-pin connect drives. The back rotating 'T' foot was also replaced with just a heel. I'm not sure where exactly in the lifecycle where those changes occurred, but you might be able to narrow down the production date (and manufacturing location) by the serial number.
The newest chip on my board is manufactured in week 11 of 1992. It seems to be easier to find a cover for an edge connector drive than one of the "new" drives. I think I'll go with whichever I can find first for this build
@@Epictronics1 - The 'Type 3' Model 80 is an IBM Japan planar with two AVE "8514/A") slots and socketed KBC chip (unique among all PS/2 models).
38:48 - Peter Wendt, the German IBM engineer, mentioned an issue with the Model 80 PSU switches, maybe contributing to the color myth.
45:06 - The drive cage wasn't changed, just the rear edge-connect retainer; You can see the side cut away for the 4869-001 bay adapter pass-through cable.
@@IBM_Museum Yeah, I forgot to mention that in the video. I read that on Ardent while recording. Maybe there was an issue with the manufacturer of the red switches?
You should try WD40 to remove that foam. Spray and leave it there for a couple of minutes... Then it will go away. I use it to remove adhesives... 😊
That Alps drive looks newer than the machine, probably a replacement.
That foam goo will come off with an oily solvent like mineral terpentine or white spirits. Possibly WD40, or a label and glue remover like GlueGone too.
Next time try nitro thinner or acetone! Ipa is not as good in breaking glue. But you should be very careful on plastic.
Also, the used lithium battery isn't prone to fail cataatrophic like ordinary NiCD. So systens with this battery type should generally be much safer.
Beautiful tower! ❤
Yeah, It looks amazing!
Been waiting for this one! I loved my model 80, I learned so much from it.
It's a sweet machine!
Great job fixing this thing up. Definitely a very backwards design in general. It'd legit probably be better turned upside down.
Thanks!
Love it - really great to see your restoration, "it has to have a red switch" yes I agree! 😂 I worked with numerous Model 80s in the nineties, running Netware (and Lotus Domino under Netware) on Token Ring networks. I think we even had an LU6.2 link between HO sites, to support replication between Domino servers - very exciting. These were the days when departments shared printers, hanging off these servers. Backup systems were a pain, as they always are. Maybe that's one possible idea, to get an ArcServe config up and going? Or if you could get hold of media for Netware .. that would be something - a Model 80 in its element? :)
Thanks :)
The closest I've been to having an IBM is a lenovo laptop. It was my first 2in1. I got it in 2014. I've never really thought genuine IBMs were worth the cost, at least not back in the day. I get it for retro purposes though.
I had to buy my first IBM used. They were expensive to purchase and even more costly to upgrade!
you know your computer is heavy when it has a built in handle and a weight warning underneath it!
I read somewhere that if you upgrade the Model 80 to its max, the handle will break from the weight :D
@@Epictronics1 that handle will NEVER break, it MAY bend though! 🤣
Cars now: made of plastic
IBM in 1987: Let's make that case of cast aluminum
or NeXT, lets make the case out of cast magnesium
UA-cam gave me an ad for Mr. Clean magic eraser while watching the case cleaning.
how suitable lol. I love Mr. Clean magic eraser! It's the last thing I try when nothing else works
@@Epictronics1Wouldn't WD-40 be the third to try to remove sticky glue?
@@Frank-Thoresen That might work. I never thought to try
@@Epictronics1 I use WD-40 to remove sticky glue. You can search for it
I had to put a foam pad in my i7-4770 to make it quiet, because I bought some old DDR3 RAM with plasma tubes that buzz all the time - lol -. The plasma tubes look amazing, but you can hear them buzzing when I try to record my YT vids, ie, I should really cut their power supply.
I love it.
Just glad it isn't my retro 386. It looks like a good way to become poor (not that I need more encouragement on that front)
The "higher end" and newer machines had white switches, as i remember
We had a Model 80 very early, it had written on Model 80, not 81 and hat a red power-switch
I don't know. I have seen a mix of PS/2s with white and red switches
I have 55SX made at the end of 1991, it has white power switch. I think later machines got white switches.
In the U.S. market, a white PS/2 switch means the upper-level model of that case style (because it can also mean a higher wattage PSU). But it was rather mixed in the European region. One false story is that the switch (no pun intended) from red to white was because of some European requirement (without ever mentioning the country/countries).
@@IBM_Museum In either way, it was a bad move ;) Red switches look great!
@@Epictronics1 Personally I think the red switch on such an expensive machine looks tacky and cheap. The creme/white switch is there for a reason, to convey it's an expensive high end computer. It's like someone with plenty of money buying a mahogany and leather lounge just because they have money to burn. It doesn't need to be expensive solid wood and high end leather but they want to show they are rich. The white switch shows classic subtle elegance and style. Red switches were only used on low-end cheaper store bought off-the-shelf models and you've ruined it. You should put the original white switch back in before anyone notices and cut that section out of the video quickly before the high-end PS2 Switch Police come looking for you ;-)
A DInoaur though a modern one. And that was my first Computer my they have come so far 😊😁👍
with the amount of effort put in modifying the red switch you might as well just have painted the white switch red :D
It wouldn't look as good though :)
250 Watts: Dolly needed to lug the thing around! 🤣
A drywall or putty knife would speed up that foam removal significantly over that little plastic pry tool.
You're not kidding about the fragile ribbon cable to the heads. I once sneezed while working on one. It's now a parts drive. Just as well. It takes about 1.2 of those to make 1.0 working one.
That sucks. I once desoldered a torn ribbon cable from the heads and soldered on tiny little wires but unfortunately, that didn't work
@@Epictronics1 I briefly considered doing that as well. I had my doubts whether the plastic head assembly would withstand the attempt, and whether I would be able to pull it off with disassembling things and then re-aligning the heads afterward. So I left it in my parts bin, just in case I need donor heads some day and get desperate enough to try.
@@nickwallette6201 The repair looked all good, so I don't understand why it didn't work. It's been many years, so maybe I should pull it out and have another go
In my uneducated opinion, I think they put those foam pads in strategic positions (via trial and error) to prevent resonance, the case suddenly getting unpleasently loud.
Same with the cars from the late 80s early 90s foam disintegrates and falls off the vents, plus it smells.
Pretty tower.
Agreed!
You might want use IPA to "soak" the sticky and gooey spots, let the alcohol work for a couple of minutes, before scraping. Time is a factor in chemistry.
You could for exampe use a piece of cloth or a sponge soaked in IPA and put it on the spots where liquid would simply run off.
Yeah, that might work. I'll try that next time
I never ran into the model 80's as workstations always as servers due to the "large" number of scsi drives you could cram in them and have a tape backup drive. I also remember the floppy drive cage with edge connectors but I only serviced a hand full of these over the years. Not being an IBM official service rep getting parts, manuals and setup disks were always a huge pain in the ass.
Thank god we have Ardent now :)
One opinion here, NOW is a good time to replace ANY caps - especially surface mount - on ANY device you cherish from the late 80s early 90s, really up until the 2000s or so.. they used SUCH JUNK back in the early 90s, it was just terrible.. really, if you're watching this channel and you have any interest at all in preserving our history, please learn to desolder, to use good flux and wic, then to re-solder. It's fun and very rewarding when done right and (well used to be) caps really aren't very expensive. You can practice on old electronics that are trash, then fix up your old PC parts and renew their lives!!
Excellent advice!
My boss had one of these. I used a PS/2 P70.
The P70 is a sweet machine
The fan in the PU should pull out the warm rising air in the case......
I should think Acetone would take care of that adhesive really quickly.
Yes, but it's a bit risky on plastic parts. I didn't want to risk it with this machine
@@Epictronics1And how about contact cleaner?
I think I'd like to pick one of these up to fill the 386 vacancy in my collection
Going to need a fish-eye lens to get that in shot. lol
Almost, I had to use a 24mm lens :)
That slimy residue very much reminds me of Aliens 😬
I am fairly certain that model actually shipped with a white power switch. Though most PC/2 systems did have a red power switch.
Those poor floppy drives. Ugh. I really need to do mine.
yeah, don't wait too long. Now is the time
I ordered one of these around 1989 at work to run a relational database system and to run the associated remote data capture system. Eventually it was replaced so I brought it home. After I retired I tried to sell it but there was no interest at all and several PS/2 systems had been on ebay with no interest. I tried firing it up and it POSTed but wouldn't run. So I had to scrap it. It's such a shame.
About a year after I started using it at work I installed a Novell network but that didn't work. We contacted IBM and under our corporate maintenance contract their engineer came and swapped out the motherboard. Apparently an I/O or DMA line was missing in the early design
I wish I had collected a few back then when they were cheap and plentiful
@@Epictronics1 I wish I hadn't thrown away all of the computers that we used and then replaced at work. We did have a scheme for some that sent some PCs to Africa but that didn't stop many computers being put in the recycling pile
Power supply from Zenith. That does go back aways.
i'm using tar mats for cars to silence whiny pcs. sticks very well and doesn't disintegrate...
For the rotten foam residue, have you tried WD40 or Acetone? I've had good results using WD40, just let it soak a bit. You need a petroleum solvent for petroleum residue so water or alcohol based solvents won't work.
I'll give that a try, thanks
@@Epictronics1 Worked best for me for the glue that remains. Should be no need to scrape, just wipe off after it has soaked in the WD40 for a good while. It's akin to that commercial product "Goo-Be-Gone", but I think a bit more effective. Don't use acetone on plastic parts however, they'll dissolve :)
asatone should work on that foam pal
Try wd-40 on the sticky surface
MXR and DOD effects pedals from the 70s and 80s also have this obnoxious petroleum based foam in them, on metal parts you can use acetone to remove it cleanly. If it's in contact with other metal parts that are not painted it will cause them to corrode, very awful stuff.
I noticed. The green stuff under the black chees turned out to be corroded conductive paint!
ah those disgusting foam pads!! Did you try WD40 to peel stickers off? Might take a bit more than a couple of minutes but if they're made of paper, they'll come off easily.
And yes, an IBM must have an orange switch!
And of course there's a dremel in action, it's an IBM video! ;)
lol. no IBM video is complete without a fix with the Dremel :D
@@Epictronics1 I didn't see a paperclip though, I'm a bit disappointed. :D
@@tony359 😆
my floppy no longer works, even after trying to replace caps.
What are my options for replacement? all drives on ebay are way too expensive :(
You probably need to do a head alignment. If that doesn't work, you can install a standard drive with an adapter. I have a very old and crappy video on how to do the head alignment. Try not to laugh lol ua-cam.com/video/fV2x4SY1EXk/v-deo.htmlsi=kkwn8dCc8c7DoPrd
Sorry but, a blue switch would be it for me ^^
WD40 is good for removing old glue
Isn't it possible to just replace the plastic lever? Or colour / dye the white one red?
I think it's difficult to make it look right
another great video. But i have to disagree with the red switch. Red ones were only on the first lot of PS2 ie 30 8086 and others from that era. They swapped to white for the later machines
Thanks
Dear god, a mains filter circuit inside a Matryoshka can! WHY?! :P
They didn't want UA-camrs in the future to have easy access to the filter caps ;)
Funny i just repaired a floppy like that model 30
acetone to get that stuff off the mettle parts :D
Acetone is great on metal
My 30/286 has a white switch too.
yeah, my Model 30-286 has a white switch too. They are unfortunately more difficult to replace
Aliens stuff is inside your ibm ps/2.
disgusting!
It is really no point in using both IPA and denatured alcohol as solvent because those are both alcohol and works in similar ways. I'd recommend petrol/diesel instead, as alcohol is polar solvent and petrol is non-polar.
For cleaning this sticky rubber, I'd suggest a knife that is being used to clean ceramic stoves.
I may give that a try, thanks
I have a dumb question: Why not just reverse the fan in the PSU and forego the intake fan entirely?
It's not a dumb question. I plan to reverse the fan to improve airflow. I'm going to install the front fan too since I slowed down the PSU fan.
are those extended pci slots? I'm not familar with that.
No, those are MCA - micro channel architecture slots
IBM charged large licence fees to make MCA cards, hence most were made by IBM themselves…3rd party MCA stuff pretty rare
@@86smoke oh ok
TOO late?
I avoid the MCA PS/2 models like the plague. I don't mind the tech behind MCA, but the fact that there are almost no cards available, makes me not be very excited about those models. The PS/2 machines with ISA bus are far more collectible.
are you swedish BTW?
yep
I dont think missing a bonding and grounding check will kill too many peiple unless the plane is stuck by lightning and the wings catch fire.
Ok never mind.
37:55 why is that a Zenith PSU there? Smh..
*Too
I worked in IBM mainframe late 80s then moved to PC services early 90s. We had IBM PS2s and also other brand PCs like Compaq and Elonex. The IBM PCs reeked quality, they felt well made and like they would last lifetime…they felt like real IBM computers. Compaq came a very close second but the Elonex felt like cheap disposable rubbish by comparison.
It seems they actually are going to last a lifetime! I'm still having fun with my 1983 IBM PC :) I worked with Compaqs back in the early 2000s. They were nice, but no way near as good as IBMs
*TOO LATE
has anyone ever said you sound a little like christopher walken? This is not criticism btw
Yeah, about 50 times lol
I thought IBMs were supposed to have an orange switch
They are orangy red actually. It doesn't show up too well on camera
@@Epictronics1 We had the all in one IBMs in high school. I remember them having orange switches. anyway.........lol
I also remember the 256 color lion picture they displayed. (our school mascot is a lion)
Downside with PS/2 is the lack of ethernet and soundcards.
I have a replica AdLib and parts on the way to build an MCV Sound Blaster :) NICs without an RJ45 are cheap on eBay. Maybe there is an RJ45 converter?
Whereas MCA token-ring, there must be millions of those in landfill
@@sprint955st Yepp.