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I had a few of these running Linux back in the late 90s. I wrote a device driver to show the system load on the control panel. it was also possible to pipe information to it. Fantastically engineered!
@@charlesdorval394 Yeah it was fun :) There were 3 of them standing together and I wanted to make a ball go back and forth on them. Do a quote from fortune maybe :) I never got around to it.
@@Great-Documentaries For a while it was necessary to directly boot from a floppy. I seem to remember the 2.4 kernel could finally boot from the hard disk. But my memory is hazy.
Best part of the whole video? In the middle of trying things to get the replacement hard drive going, you randomly mention that the computer needs a red power switch. Fully agree!
Hi Epictroncis, Nice repair. Steven use the IBM Server 95XP as a dos server. It is a nice system. We wish you and your family a happy new year and a great 2025! Greetings from Steven from the Netherlands
Awesome machine. This opens fresh wounds from trashing mine years ago. 😢 I may still have some drive sleds and front plates if you need them. I know I still have the CPU board.
If we had only known how fun these machines would be all these years later. I have similar regrets, unfortunately. Hold on to those parts, I may need them to complete this project :)
vlb and eisa were there just by that time. of course IBM with its proprietary stuff wouldn't adopt an "open standard", rather everyone else did (well, the higher end models of motherboards)
@@cocusar Well, the PC bus and AT bus (later dubbed ISA) were also "proprietary" when they were first introduced - until the industry adopted them... for free. This time, however, IBM wanted royalties for MCA, which didn't sit well with clone manufacturers, prompting them to create a competing standard - EISA. VL-Bus targeted a different market segment - it was never really suitable for server use.
24:02 That HD has no reference partition. You'd had to build the diskettes with the original drive, swap drives, start with the reference diskette ... and entirely reformat the HD. Put the reference partition on it and then you could do something with it. The first HD (ID6) *has* to have a reference partition on those models. This partition also includes parts of the IML (Initial Microcode Load), which was changeable and was a precursor of flash BIOS. It contains variable parts of the machine firmware. No IML - no boot.
@@Epictronics1 Depends on. The first (IML) drive which - on the older systems has to reside at ID6 - may not exceed 3.9GB or 1GB on the very old SCSI firmware. With the 92F2244 / 45 SCSI Bios chips a slow old but silent DORS- or DCAS-32160 (2.16GB) should do fine there. Any *additional* drive is only limited by the controller and - as far as I remember - I had a 32GB DDRS server drive in my 95A (A !! different platform with the F/W "Corvette" SCSI). The Spock and Tribble limit might be 8 or 16 GB. The CPU complex needs to have a BIOS 41G9361 to support IML drives over 1GB. Which yours hasn't. It has the stock 1993 07G0463.
I've read about that procedure and I've also that same problem with one PS/2 56 Type 8556 medialess (with network card and without HDD), and according to Ardent Tool website, the machine is fully upgradable to "normal" configuration with HDD. Now, the question is, how to get that IML Partition into a SCSI HDD? I have some, but can't get them working in this PS/2 because that IML Partition. How people did back in the day if the HDD died? Any enlightenment would be much appreciated and thank for the great content, as usual.
@@anca30000 He *factically* did it right in his attempt. He'd downloaded the reference and diagnostic diskette images, made two diskettes from it, bootet the system from the reference disk and picked "Backup / Restore System Partition" - "Restore the System Partition". Where he failed was, to choose a HD bigger than 1GB. Most old models cannot use an IML disk over 1GB. The later models with updated systemboard support and updated SCSI BIOS can handle drives up to 3.94GB ... which is a stupid value. The IML partition sits at the physical end of the HD and the controller storage register (or that of the BIOS routine respectively) cannot cope with values over 4GB at that point. So it is always useful to have a batch of smaller, old 60, 80 or 160MB HDs at hand for the sole purpose to store the IML on it ...
@@wacholder5690 Excellent. My smallest drive is 9GB. I'll find a smaller drive and upgrade the BIOS on the complex. I'm also going to upgrade to a Corvette for this project.
26:58 The maximum drive size supported for IML is 3.94GB. The IML partition is physically located at the *end* of the drive - and the controlling firmware cannot adress over 4GB minus reference partition. That's an unfortunate flaw in the IML strategy.
@@Epictronics1 If possible, do a video about that procedure. I've that same problem with my precious PS/2 55 type 8556 It only supports HDDs up to 2gb and my version is medialess (with network card and without HDD). According to Ardent Tool of Capitalism (and other IBM related sites), the machine is fully upgradable to "normal" configuration, but I can't found any information about the procedure, especially how to deal with the problem that you encountered (the IML Partition).
Just to add the info that my "media less" PS2, has the 2.88 floppy drive working great and the usual SCSI controller also working just fine. The problem is "only" the infamous IML Partition.
Hi ! The AHF Model came with the 92F0079 / 486SX-25 complex / 8MB RAM (the 'H' in the middle) and 400MB SCSI HD (the 'F' at the end). The 55- in the serial number indicates Greenock in Scotland as place of production. US-models mainly were designated as 0HF, european as AHF. When it was 8595 it came with XGA, after the "facelift" the 1P/1S mainboard models were assigned as 9595 and came with XGA2. ("PS/2 Premium Line") 🙂 The 2S/2P sysboard models were a totally different story.
Thanks for the info! So, It's mostly original, then. In that case, the only unknown is the SCSI controller, which clearly has been replaced with an older part
@@Epictronics1 I think it should have the "Spock" (SCSI with cache) not the "Tribble" (SCSI w.o. cache). But I can't recall if the lower end models didn't come with these as well. (I seem to have forgotten more about PS/2 than many others ever knew ...)
That's one nice Capitalist Tool! The side panel is definitely from a newer machine. Only some later machines had the small hole - probably so the user/technician could check if the squirrel cage fan is spinning. As for the yellow film and mud-like dust, well... that's everyone's favorite nicotine residue.
Watching your videos makes me want to get a PS/2 system of my own, even though the hoops you have to jump through for a good DOS gaming experience make it not the best choice. Maybe it’s because my first IBM compatible machine was a handed down PS/2 Model 25, even though that’s ISA and not Microchannel.
I'm new to these old computer restorations. For people who do this kind of thing as a hobby, I'm just curious what you use these machines for once they are restored? Is there a practical use you put them to? Do you switch them on frequently and use them? Is it to run old programs that you can't get anymore?
what a fantastic machine, ide give anything to be able to have one of those to do up & bring back to life but sadly i dont drive & live in the far southwest of the UK away from the towns & city's where these things can be found & no one will ship anything these days. I also had an accident this year which has diabled me so i cant get out & about much, So it looks like i will never find one, ime glad that big old beast found you & will be preserved for future generations, they are awesome unusual mashines. I do very much enjoy your restoration video's keep up the awesome work.
That 120mm fan in that PSU makes me think of this ISA passive backplane system I got, it had an AC fan in the rear of it that had at some point locked up and the impeller was very crispy as a result, I replaced it with a 1700rpm 120x38 Panaflo fan it seemed to do the job well and isn't particularly loud.
Ah yes, more of IBM's shenanigans. They made some really strange internal designs there, like they were continually experimenting and over-complicating things.
The "Apple Macintosh Quadra 900" did also have a "modular" PSU in 1991. Maybe those workstation type computers were designed for cable management in mind from the start.
I had a 90 XP 486 that I got off ebay when I was in high school back in 99. Super killer machine, had a bunch of games loaded on it from the reseller. But from that part number, that was probably a server model... You can tell because the part number starts with 9 instead of 8 like most other PS/2s. If you can find it the earlier print versions of Upgrading and Repairing PCs has a great reference guide of everything up to the last PS/2 model.
That's very cool. I need to find the right version of the book with the PS/2 stuff. I already have the first edition and one edition from the 90s. Great read!
By the introduction of the first 95xx desktops like 56 / 57 or 76 / 77 IBM "facelifted" the 8590 and 8595 to 9590 and 9595 "PS/2 Premium Line" with primarily the XGA2-adapter and some newer, larger and faster HD. Essentially they stayed the same however. Some processor platforms were no longer offered. Parallel to that the "Server 95A" has been introduced with the 2S/2P mainboard, which was targeted towards server funtions offerind the 486DX50 or the pentium platforms (Type 4) and - in addition - the first MCA Raid Adapter for PS/2 plus some stupidly designed and awkward to operate hot-swap drive bays for HDs. Things got better over years but the bigger model Server 500, which was technically a 95A in a *way* bigger case with way more advanced detail designs. I had a few of these - still have a Server 520 MCA/PCI with 18 drivebays in the basement ...
@@Epictronics1 the one I had was the 4th edition, if you can find a later one with the CDROM if I remember right it includes PDFs of some of the older editions.
Cool stuff Roman! I love these old PS/2s, lovely old beasts! 🥰 I still have to rebuild my own 95 as it's in even more shittier state than yours was. It's starting to rust and there's even some mold inside so I guess it was stored in a damp environment.. Nothing a good wash and some Rust-Oleum cannot fix I hope ;-) Mine even has a SCSI CD-ROM and a tape drive in the second floppy bay and I'm currently restoring a P5 66MHz CPU complex which I hope works. It has 64 megs which is insane for a 1992 machine and if my P66 SynchroStream complex runs it's going to be a very nice high end early nineties machine! 😍
A long time ago in a galaxy not so far away, the carriage return was found on every typewriter. I still call it the return key, never got it out of my system.
Typical IBM 1990s overengineering. I absolutely love it! A computer you could duck behind in an action movie to avoid a spray of Uzi bullets and come out okay! :D
@@Epictronics1 very likely. Also if the monitor contributes to the lighting of the room. There is another way, using a color card and leaving it in frame for the duration of the video. Once you color match the card, the rest should look normal too. Also shooting in log often helps, if your camera supports that.
@@Epictronics1 as long as the display is contributing significantly to the lighting of the room, perhaps :)) eh, guess we'll have to live with that. Not the end of the world.
hey nice 95, but i can't beleve that your PSU has no leaking caps, i have 6x Model 95 (8595 and 9595) and all PSU had realy bad caps in the output side of the PSU 😀 have a nice start into 2025
The 2S2P planar is not compatible with older complexes (Types 1 through 3), so the older 1S1P variant remained in production until the older complexes were withdrawn from market. 9595-AHF - not sure about the A**, but *H* indicates 486SX-25 and **F means 400 MB hard drive, so these two components are probably original. Btw, the LED displays are off-the-shelf parts, not customized.
As far as I recall the panel was taken from an RS/6000 machine and the second switch was used to IPL / restart the unit or something. Why invent the wheel new every other day ... ?
@@wacholder5690 RS/6000 machines use 7-segment diagnostic displays. The second switch, while referred to as the Remote IPL Switch, is actually used to enable the little known Remote Power-On feature. It's connected to the J4 header on the 1S1P planar and is intended for use with modems or NICs.
@@GeckonCZ I know that is used on the PS/2 95 for some purposes. But after 20+ years I did not recall all the details. As said: I wandered off from PS/2 some decade ago. And the topic on where the panel originates from and what it is fully used for had been point of discussion in the newsgroup fairly often.
@@wacholder5690 Yeah, I remember that. :) Peter W. got that info from some IBM instructor. According to the story, the panel came from a 3270 Control Unit. But no matching unit was ever seen in the wild, and the panel appears to have been specifically designed for the 95. But who knows...
Obsessive-compulsive disorder (OCD) features a pattern of unwanted thoughts and fears known as obsessions. These obsessions lead you to do repetitive behaviors, also called compulsions. These obsessions and compulsions get in the way of daily activities and cause a lot of distress.hmmmp
Oh look, that disk looks like that old EXPENSIVE 500Mb Seagate SCSI I disk that I was able to recover all data from regardless the fact it sounded like a screeching moped grinding the break pads.
@@Epictronics1 Dude, the SCSI disk I referred had the invoicing for the computer shop for the previous 4 years, not needing to re-create that database manually from paper records would not have been nice, and it was not needed in the end :) *Yep this was before digital invoices, stocks etc were the norm
@@Epictronics1 The IBM 0661, 0662 "Spitfire" and 0663 Corsair drive types were already a bit noisy right from the start. They were overcomplicated and densely packed technical miracles - but simply loud. The 1GB 0663 was a technological groundbreaker using MR-heads for the first time on commercial drives. This one looks like a 0661-Model 400. They *were* noisy with a slightly metallish singing. It rotates at 4.317.8 rpm according to specs and was *way* faster than the "other" drives. But that came with a price ....
@@wacholder5690 That's pretty cool. I will need to order some stuff to attempt to make the newer 9Gb drive work in this machine. So, it seems we need to cope with this 0661 in the upcoming overclocking video :)
@@Epictronics1 Depending on what processor complex you are going to use and which of the SCSI adapters I would recommend to bring them up to last spec with the latest platform Eprom and the "Over 1GB SCSI BIOS" (the famous 92F2244 / 92F2245 Eproms) to avoid any further problems. Towards the end of my 9595-S30 I'd even stuffed in an SCSI-to-IDE converter and ran a 32GB IDE drive in it. That however was the 2S/2P mainboard and a type 4 platform with Flash BIOS that *could* have an IML / Reference / Convenience partition - but did not *need* one. The best results however delivered the 9.1GB IBM DGHS Server drive. I think this is still in it - down in the basement after I mainly parted from computers in my private life.
could you please deactivate the automatic translation in your channel settings - it really sucks to get an AI generated voice over and always need to switch to original language
That is RUclips's doing. I didn't enable it. If you click on the cog at the bottom right corner of the video and then the audio option. you can turn it off in any video
@@Epictronics1 It seems you can disable the autogenerated voices before uploading each video, but now* for a lot of people it can be the only way to understand you. *A few months ago subtitles stopped being generated by the old AI that worked pretty well (maybe it became sentient and they sold it to the military 😱) and it seems that the new AI has a terrible lack of training, in fact sometimes RUclips asks me what problems I found with the subtitles in videos that don't even have subtitles or in which nobody spoke 🤦♂ The new AI seems unable to distinguish individual words from complete sentences, so it translates chunks of sentences without any context and then joins the translated chunks, creating fake sentences that make no sense at all. But the strangest thing is that they don't use the AI that translates the voices and seems to do a good job to create the subtitles as well, maybe that AI has been trained only with voice and is illiterate 🤔
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What a beast, cleaned up very nicely!
I had a few of these running Linux back in the late 90s. I wrote a device driver to show the system load on the control panel. it was also possible to pipe information to it. Fantastically engineered!
cool :)
That must have been awesome!
I kept thinking about how nice it would be to have it display stuff :)
@@charlesdorval394 There is a simple app to send text to the display. That's what I used in the outro
@@charlesdorval394 Yeah it was fun :) There were 3 of them standing together and I wanted to make a ball go back and forth on them. Do a quote from fortune maybe :) I never got around to it.
@@Great-Documentaries For a while it was necessary to directly boot from a floppy. I seem to remember the 2.4 kernel could finally boot from the hard disk. But my memory is hazy.
Best part of the whole video? In the middle of trying things to get the replacement hard drive going, you randomly mention that the computer needs a red power switch. Fully agree!
Someone needs to print red power switches for the 95 :)
Hi Epictroncis, Nice repair. Steven use the IBM Server 95XP as a dos server. It is a nice system. We wish you and your family a happy new year and a great 2025! Greetings from Steven from the Netherlands
Thank you. Happy 2025!
Awesome machine. This opens fresh wounds from trashing mine years ago. 😢 I may still have some drive sleds and front plates if you need them. I know I still have the CPU board.
If we had only known how fun these machines would be all these years later. I have similar regrets, unfortunately. Hold on to those parts, I may need them to complete this project :)
The model 95 is one of my favorite PS2 systems. It was an amazing machine in it's day!
Beautiful IBM hardware, built like a tank.
IBM never ceases to amaze with weird proprietary designs.
What blows me away is that even in 1992 they were still clinging to micro channel even though it had been a complete disaster for them.
@@tspawn35 There was no other 32-bit slots then, though.
vlb and eisa were there just by that time. of course IBM with its proprietary stuff wouldn't adopt an "open standard", rather everyone else did (well, the higher end models of motherboards)
No one's ever done that before😂
@@cocusar Well, the PC bus and AT bus (later dubbed ISA) were also "proprietary" when they were first introduced - until the industry adopted them... for free. This time, however, IBM wanted royalties for MCA, which didn't sit well with clone manufacturers, prompting them to create a competing standard - EISA. VL-Bus targeted a different market segment - it was never really suitable for server use.
Absolutely beautiful Model 95. Reminds me I need to get my Model 77 up and running at some point.
Thanks for another year of great videos!
Thanks :)
Those PS/2 systems were a marvel of engineering and design for their time. Proprietary as can be (on purpose) but still impressive in many ways!
Challenging as they are, there wouldn't be anything to clone for the clones without these IBMs
24:02 That HD has no reference partition. You'd had to build the diskettes with the original drive, swap drives, start with the reference diskette ... and entirely reformat the HD. Put the reference partition on it and then you could do something with it. The first HD (ID6) *has* to have a reference partition on those models. This partition also includes parts of the IML (Initial Microcode Load), which was changeable and was a precursor of flash BIOS. It contains variable parts of the machine firmware. No IML - no boot.
Apparently, it's also incompatible with large drives. I'm working on fixit it as I write this :) Thanks
@@Epictronics1 Depends on. The first (IML) drive which - on the older systems has to reside at ID6 - may not exceed 3.9GB or 1GB on the very old SCSI firmware. With the 92F2244 / 45 SCSI Bios chips a slow old but silent DORS- or DCAS-32160 (2.16GB) should do fine there. Any *additional* drive is only limited by the controller and - as far as I remember - I had a 32GB DDRS server drive in my 95A (A !! different platform with the F/W "Corvette" SCSI). The Spock and Tribble limit might be 8 or 16 GB. The CPU complex needs to have a BIOS 41G9361 to support IML drives over 1GB. Which yours hasn't. It has the stock 1993 07G0463.
I've read about that procedure and I've also that same problem with one PS/2 56 Type 8556 medialess (with network card and without HDD), and according to Ardent Tool website, the machine is fully upgradable to "normal" configuration with HDD. Now, the question is, how to get that IML Partition into a SCSI HDD? I have some, but can't get them working in this PS/2 because that IML Partition. How people did back in the day if the HDD died?
Any enlightenment would be much appreciated and thank for the great content, as usual.
@@anca30000 He *factically* did it right in his attempt. He'd downloaded the reference and diagnostic diskette images, made two diskettes from it, bootet the system from the reference disk and picked "Backup / Restore System Partition" - "Restore the System Partition". Where he failed was, to choose a HD bigger than 1GB. Most old models cannot use an IML disk over 1GB. The later models with updated systemboard support and updated SCSI BIOS can handle drives up to 3.94GB ... which is a stupid value. The IML partition sits at the physical end of the HD and the controller storage register (or that of the BIOS routine respectively) cannot cope with values over 4GB at that point. So it is always useful to have a batch of smaller, old 60, 80 or 160MB HDs at hand for the sole purpose to store the IML on it ...
@@wacholder5690 Excellent. My smallest drive is 9GB. I'll find a smaller drive and upgrade the BIOS on the complex. I'm also going to upgrade to a Corvette for this project.
26:58 The maximum drive size supported for IML is 3.94GB. The IML partition is physically located at the *end* of the drive - and the controlling firmware cannot adress over 4GB minus reference partition. That's an unfortunate flaw in the IML strategy.
We'll fix it, thanks :)
@@Epictronics1
If possible, do a video about that procedure.
I've that same problem with my precious PS/2 55 type 8556
It only supports HDDs up to 2gb and my version is medialess (with network card and without HDD).
According to Ardent Tool of Capitalism (and other IBM related sites), the machine is fully upgradable to "normal" configuration, but I can't found any information about the procedure, especially how to deal with the problem that you encountered (the IML Partition).
Just to add the info that my "media less" PS2, has the 2.88 floppy drive working great and the usual SCSI controller also working just fine.
The problem is "only" the infamous IML Partition.
@@anca30000 I have some thoughts on how to solve this. I have ordered some stuff, and I'll get back to this
@@anca30000 I'm pretty sure I have one of those too :) As always, I'll share the restoration here on YT
Amazing looking machine
I literally swore out loud when you showed that motherboard compared to a regular one!
Wow, very cool system. Thanks for video.
Hi ! The AHF Model came with the 92F0079 / 486SX-25 complex / 8MB RAM (the 'H' in the middle) and 400MB SCSI HD (the 'F' at the end). The 55- in the serial number indicates Greenock in Scotland as place of production. US-models mainly were designated as 0HF, european as AHF. When it was 8595 it came with XGA, after the "facelift" the 1P/1S mainboard models were assigned as 9595 and came with XGA2. ("PS/2 Premium Line") 🙂 The 2S/2P sysboard models were a totally different story.
Thanks for the info! So, It's mostly original, then. In that case, the only unknown is the SCSI controller, which clearly has been replaced with an older part
@@Epictronics1 I think it should have the "Spock" (SCSI with cache) not the "Tribble" (SCSI w.o. cache). But I can't recall if the lower end models didn't come with these as well.
(I seem to have forgotten more about PS/2 than many others ever knew ...)
@@wacholder5690 That makes sense, but I think I'm gonna go with a Corvette for this build
@@Epictronics1 That should do the trick. 🙂
@@wacholder5690 Does the Corvette have the same 1/4GB limit with the SX25 complex?
That's one nice Capitalist Tool! The side panel is definitely from a newer machine. Only some later machines had the small hole - probably so the user/technician could check if the squirrel cage fan is spinning. As for the yellow film and mud-like dust, well... that's everyone's favorite nicotine residue.
I better stop chain-smoking in the studio, haha. Thanks for the info :)
Amazing work and video! Thanks for sharing!
Thanks Rudy!
Watching your videos makes me want to get a PS/2 system of my own, even though the hoops you have to jump through for a good DOS gaming experience make it not the best choice. Maybe it’s because my first IBM compatible machine was a handed down PS/2 Model 25, even though that’s ISA and not Microchannel.
The challenge is half the fun :)
I'm new to these old computer restorations. For people who do this kind of thing as a hobby, I'm just curious what you use these machines for once they are restored? Is there a practical use you put them to? Do you switch them on frequently and use them? Is it to run old programs that you can't get anymore?
My projects never seem to get completely finished, there is always something more to fix or upgrade. Occasionally I use them for retro gaming
That's a grand beast, I have to say. It's great fun to see it and watch it being brought to life. All this and I'm not even spending any money! 😉
lol. I had to take out a second mortgage for this video, haha ;) Consider becoming a Patreon :D
@@Epictronics1 If I come into money, I'll pass some of it along. Right now, I buy bread and cheese at scratch and dent sales. 🙄
@@jozsefizsak Oh, that sounds rough. Good luck to you!
@@Epictronics1 I'm embellishing a bit. 😉
what a fantastic machine, ide give anything to be able to have one of those to do up & bring back to life but sadly i dont drive & live in the far southwest of the UK away from the towns & city's where these things can be found & no one will ship anything these days. I also had an accident this year which has diabled me so i cant get out & about much, So it looks like i will never find one, ime glad that big old beast found you & will be preserved for future generations, they are awesome unusual mashines. I do very much enjoy your restoration video's keep up the awesome work.
Thank you :) I hope you will find one someday
You are featured video on Ardent ....
Thats cool :) Those guys are great :)
That 120mm fan in that PSU makes me think of this ISA passive backplane system I got, it had an AC fan in the rear of it that had at some point locked up and the impeller was very crispy as a result, I replaced it with a 1700rpm 120x38 Panaflo fan it seemed to do the job well and isn't particularly loud.
Yeah, I have replaced a few PS/2 fans with Noctua fans, but this one wasn't too bad
Ah yes, more of IBM's shenanigans. They made some really strange internal designs there, like they were continually experimenting and over-complicating things.
The "Apple Macintosh Quadra 900" did also have a "modular" PSU in 1991. Maybe those workstation type computers were designed for cable management in mind from the start.
So much nicer to work with, than the mess that became standard
I had a 90 XP 486 that I got off ebay when I was in high school back in 99. Super killer machine, had a bunch of games loaded on it from the reseller. But from that part number, that was probably a server model... You can tell because the part number starts with 9 instead of 8 like most other PS/2s. If you can find it the earlier print versions of Upgrading and Repairing PCs has a great reference guide of everything up to the last PS/2 model.
That's very cool. I need to find the right version of the book with the PS/2 stuff. I already have the first edition and one edition from the 90s. Great read!
By the introduction of the first 95xx desktops like 56 / 57 or 76 / 77 IBM "facelifted" the 8590 and 8595 to 9590 and 9595 "PS/2 Premium Line" with primarily the XGA2-adapter and some newer, larger and faster HD. Essentially they stayed the same however. Some processor platforms were no longer offered. Parallel to that the "Server 95A" has been introduced with the 2S/2P mainboard, which was targeted towards server funtions offerind the 486DX50 or the pentium platforms (Type 4) and - in addition - the first MCA Raid Adapter for PS/2 plus some stupidly designed and awkward to operate hot-swap drive bays for HDs. Things got better over years but the bigger model Server 500, which was technically a 95A in a *way* bigger case with way more advanced detail designs. I had a few of these - still have a Server 520 MCA/PCI with 18 drivebays in the basement ...
@@wacholder5690 Those are pretty cool servers too. I'm trying to find a 500 to restore
@@Epictronics1 the one I had was the 4th edition, if you can find a later one with the CDROM if I remember right it includes PDFs of some of the older editions.
Found it. The 4th revision covers up to the 8595-0KF. The perfect revision for PS/2 stuff is probably the 5th or 6th revision.
Cool stuff Roman! I love these old PS/2s, lovely old beasts! 🥰
I still have to rebuild my own 95 as it's in even more shittier state than yours was. It's starting to rust and there's even some mold inside so I guess it was stored in a damp environment.. Nothing a good wash and some Rust-Oleum cannot fix I hope ;-) Mine even has a SCSI CD-ROM and a tape drive in the second floppy bay and I'm currently restoring a P5 66MHz CPU complex which I hope works. It has 64 megs which is insane for a 1992 machine and if my P66 SynchroStream complex runs it's going to be a very nice high end early nineties machine! 😍
Sounds like a fun project :) You can never have too much RAM. I just installed 40MB in my Model 80. It takes roughly an afternoon to post, haha
The best IBM is the PS/1000 - because obviously it's the highest number.
Obviously
That cleaned up wonderfully from where it was! I like my hard drives kinda noisy, maybe I'm an outlier?
Depends on what type of noise. That drive had a nasty high pitch noise :/
A long time ago in a galaxy not so far away, the carriage return was found on every typewriter. I still call it the return key, never got it out of my system.
I actually learned to type on typewriters. I didn't get my first computer until 1985
@Epictronics1 I did get over reaching up for the lever on the typewriter at least!
wht type of desktop ide does it have?
i wonder if a voltage converter would allow a pentium overdrive to work in there?
Not quite that easy, but there are ways to get a Pentium in this IBM
Parts units combine!
All IBM original components! This machine must have cost a fortune when it was new.
Typical IBM 1990s overengineering. I absolutely love it! A computer you could duck behind in an action movie to avoid a spray of Uzi bullets and come out okay! :D
Lol. We might actually have to do just that in the overclocking video if we can make it DOOM proper :)
そんな時代のケースの作りが未だ一般向けのケースの作りよりはるかに出来がいいなんて
Amazing build quality. This IBM is probably going to outlast us all
Shame that we were stuck with 1.44MB floppy capacity and not the 2.88MB . I was so happy when i got my first CD-Rom.
Lots of weird loose parts you don't want ti lose!
True!
"At the back here we have a huge fan."
Welcome to the comments section!
Why not use a gray card to set the white balance manually?
I tried that, but the colors still looked wrong. I think it's the mixed lights in the studio that confuse the camera
@@Epictronics1 very likely. Also if the monitor contributes to the lighting of the room.
There is another way, using a color card and leaving it in frame for the duration of the video. Once you color match the card, the rest should look normal too.
Also shooting in log often helps, if your camera supports that.
@@thebayandurpoghosyanshow My grey bench improved things, but the scenes with a display are probably hopeless.
@@Epictronics1 as long as the display is contributing significantly to the lighting of the room, perhaps :)) eh, guess we'll have to live with that. Not the end of the world.
I'd prefer the slightly bluish LCD over the computer looking like it's a Backrooms artifact.
I got a Model 95 485 50mhz and a Pentium 90
hey nice 95, but i can't beleve that your PSU has no leaking caps, i have 6x Model 95 (8595 and 9595) and all PSU had realy bad caps in the output side of the PSU 😀 have a nice start into 2025
Thanks. I imagine there were several manufacturers of PSUs for these machines. Are your PSUs ZYTEC branded too?
@@Epictronics1 I don't know if some was from ZYTEC, but there were definitely some from SCHRACK there, i will check it again
The 2S2P planar is not compatible with older complexes (Types 1 through 3), so the older 1S1P variant remained in production until the older complexes were withdrawn from market. 9595-AHF - not sure about the A**, but *H* indicates 486SX-25 and **F means 400 MB hard drive, so these two components are probably original. Btw, the LED displays are off-the-shelf parts, not customized.
Ah, that makes sense, thanks :)
As far as I recall the panel was taken from an RS/6000 machine and the second switch was used to IPL / restart the unit or something. Why invent the wheel new every other day ... ?
@@wacholder5690 RS/6000 machines use 7-segment diagnostic displays. The second switch, while referred to as the Remote IPL Switch, is actually used to enable the little known Remote Power-On feature. It's connected to the J4 header on the 1S1P planar and is intended for use with modems or NICs.
@@GeckonCZ I know that is used on the PS/2 95 for some purposes. But after 20+ years I did not recall all the details. As said: I wandered off from PS/2 some decade ago. And the topic on where the panel originates from and what it is fully used for had been point of discussion in the newsgroup fairly often.
@@wacholder5690 Yeah, I remember that. :) Peter W. got that info from some IBM instructor. According to the story, the panel came from a 3270 Control Unit. But no matching unit was ever seen in the wild, and the panel appears to have been specifically designed for the 95. But who knows...
The yellow tinged gunk is probably tar and nicotine, you know, cigarette smoke.
That cpu card has a socket with an extra pin for overdrive cpu
Yepp, We're gonna try an ODPR in that socket
Great video
Thanks!
Those who find high-pitched hard drive noises annoying should not be watching this video 😜 a lot of people miss those sounds when using emulators!
Obsessive-compulsive disorder (OCD) features a pattern of unwanted thoughts and fears known as obsessions. These obsessions lead you to do repetitive behaviors, also called compulsions. These obsessions and compulsions get in the way of daily activities and cause a lot of distress.hmmmp
Oh look, that disk looks like that old EXPENSIVE 500Mb Seagate SCSI I disk that I was able to recover all data from regardless the fact it sounded like a screeching moped grinding the break pads.
Apparently, this is the original drive installed from facory. Still works!
@@Epictronics1 Dude, the SCSI disk I referred had the invoicing for the computer shop for the previous 4 years, not needing to re-create that database manually from paper records would not have been nice, and it was not needed in the end :)
*Yep this was before digital invoices, stocks etc were the norm
@@Epictronics1 The IBM 0661, 0662 "Spitfire" and 0663 Corsair drive types were already a bit noisy right from the start. They were overcomplicated and densely packed technical miracles - but simply loud. The 1GB 0663 was a technological groundbreaker using MR-heads for the first time on commercial drives. This one looks like a 0661-Model 400. They *were* noisy with a slightly metallish singing. It rotates at 4.317.8 rpm according to specs and was *way* faster than the "other" drives. But that came with a price ....
@@wacholder5690 That's pretty cool. I will need to order some stuff to attempt to make the newer 9Gb drive work in this machine. So, it seems we need to cope with this 0661 in the upcoming overclocking video :)
@@Epictronics1 Depending on what processor complex you are going to use and which of the SCSI adapters I would recommend to bring them up to last spec with the latest platform Eprom and the "Over 1GB SCSI BIOS" (the famous 92F2244 / 92F2245 Eproms) to avoid any further problems. Towards the end of my 9595-S30 I'd even stuffed in an SCSI-to-IDE converter and ran a 32GB IDE drive in it. That however was the 2S/2P mainboard and a type 4 platform with Flash BIOS that *could* have an IML / Reference / Convenience partition - but did not *need* one. The best results however delivered the 9.1GB IBM DGHS Server drive. I think this is still in it - down in the basement after I mainly parted from computers in my private life.
wow how weird. this of all overbuilt ps/2s tells me how badly ibm really wanted to kill off the open architecture pc, the monster they created
Their last attempt to regain dominance
could you please deactivate the automatic translation in your channel settings - it really sucks to get an AI generated voice over and always need to switch to original language
Ok, I think, I managed to turn it off.
As a Spanish speaker, please, PLEASE, disable the AI Spanish audio track, it was a horrible experience. YT creating problems where there are none
That is RUclips's doing. I didn't enable it. If you click on the cog at the bottom right corner of the video and then the audio option. you can turn it off in any video
Ist das deine Echte Stimme oder Künstlich, sorry wenn ich falsch liege, es Klngt alles sehr Künstlich.. wenig authentisch.
That is RUclipss doing. You need to turn off the new auto-dubbing feature
Shitty AI voice automatically translated in French ...
That is RUclips's doing. You can turn it off by clicking on the cog in the bottom right corner of the video.
Why do i hear a ai generated german voice i hate this very much!
That's a RUclips thing. It's not my doing. You need to turn it off to get rid of it.
@@Epictronics1 It seems you can disable the autogenerated voices before uploading each video, but now* for a lot of people it can be the only way to understand you.
*A few months ago subtitles stopped being generated by the old AI that worked pretty well (maybe it became sentient and they sold it to the military 😱) and it seems that the new AI has a terrible lack of training, in fact sometimes RUclips asks me what problems I found with the subtitles in videos that don't even have subtitles or in which nobody spoke 🤦♂
The new AI seems unable to distinguish individual words from complete sentences, so it translates chunks of sentences without any context and then joins the translated chunks, creating fake sentences that make no sense at all.
But the strangest thing is that they don't use the AI that translates the voices and seems to do a good job to create the subtitles as well, maybe that AI has been trained only with voice and is illiterate 🤔