14:57 - I ran into so many weird sockets/slots/connectors back in the day that I never figured out as they were rarely used and now in 2023 I'm watching these retro channels, having my mind blown to finally discover their purposes and that there are still parts to fit them floating around out there.
AliExpress and eBay are awesome resources to find weird and odd stuff like these vertical VRAM chips. And they are just as fun to mess around with today, as back in 1993 :)
You know what. I skipped this video because I thought it was an April Fool's joke based on the title and because it was April 1st. I had already seen so many April Fool's videos that day I was just too tired of them. Then I just watched part 2 and find out, this wasn't an April Fool's joke. So here I am to catch up. I guess the joke was on me!
Hey Epitronics! I have one of these IBM PS/1 computers just like yours, except I think mine is a slightly newer version. Mine has all four ram slots already installed, but it only has four instead of eight cache slots. Also my co processor slot is Zero Insertion Force and says IBM OVERDRIVE Ready. Otherwise I think the board is the same. I might come back and comment on this comment if I find other oddities. EDIT 1 I notice your Cyrus Logic graphics chip is the GD5424. Mine is different, being a Cyrus Logic GD5426. Also my board came with a full 1mb video ram soldered on. My board does not have the strange single inline socket yours has for video memory. The date code of the chip is the 14th week of 1993. Which mirrors the date on many other chips on my board. Additionally, I noticed that my BIOS part number is different. Yours is 65g9498. Mine is 52g2974 IBM Corp, 1993 All rights reserved PF3A. Regarding the resistors you hack in a later video to change the bus speed. R174, R175, and R176. My board is configured from the factory to where R174 and R175 are pulled low. That is the same configuration you used when you put a DX2 66 in the second slot. It's really interesting how IBM simply reconfigured one board across multiple computers to fit multiple hardware specifications. I conclude that I REALLY like this motherboard.
About bent pins: some time ago I found an AMD K6-2 450MHz with few corroded pins which just fell off so I used dremel to clean corrosion and soldered new pins made of cutted resistor legs and it is working fine so it is not a big problem to fix something like this.
There was actually a fair amount of bible/religious software and games, much of which came out in the multimedia era that this PC came from. I remember Foone had a couple of Twitter threads about bible games, but I can't find it in their wiki. Hopefully if they didn't wipe the drive, you might be able to find some of those games/software on there.
Ya i’ve bent a pin before on this style cpu pins on a mac. Very simillar, they are suprisingly robust and can generally be bent back once without too much stress. But bend it again, the stress fractures are too much and it’ll prolly be time for plan B. If you do need to solder a new pin, i love how there’s such a large pad to work with.
Ah, Intel's famous LIF socket. LIF = Lotsa Insertion Force. I never liked that socket either, I always felt like I was going to break something either inserting or removing a chip from one.
Upgraded my 486DX2 with that exact sound blaster CD/card combo back in 1993/1994. If memory serves me, it cost a pretty penny back then. The game called the 7th guest is what made me want to upgrade. Fun times!!
One of the very first mods I make on old machines, if I don't replace the power supply outright, is to replace the PSU fan. I generally go with fans that have plastic-covered temperature probes, and I attach the probes to the hottest component in the PSU. I did this to an AT PSU in a Tandy 486 about two years ago. It's so quiet, every time I boot it I put my hand behind it to make sure I feel a breeze. These PSU fans pushed so much more air than they needed to for the PSU to keep cool. I've only ever heard the fan spin up once-- it's so unusual it actually startled me for a second.
@@Epictronics1 I used Arctic F8-TC and F9-TC fans (80 mm / 92 mm respectively). But, I bought them four years ago and it doesn't look like they make them anymore! I would have bought a bunch had I realized they weren't going to catch on. Maybe eBay has some.
@Epictronics1 They do! They're inexpensive, except for shipping. You're much closer to the UK than I am, so it might be less expensive for you. All told, it would be about $30 USD for me, so about twice the price they were four years ago, but 2/3 of that is shipping across the pond.
I've straightened out a couple of AM2/3 chips one of which was very badly mangled using just a jewellers screwdriver and just by touch since my poor old eyes can't focus on those pins anymore!
12:30 I've never saw such a damper on any floppy drives which I have serviced. Probably way better than smash those heads every time you insert a disk.
With regards to the Panasonic drive, I bought the same drive for either my original 386sx40 or after I upgraded to a dx2/66. Even though it was a Creative branded drive, you could get them on their own as well, I only got mine as they had ran out of Cr562 models in the shop and I had it plugged into a Aztech sound galaxy 16.
I'm doing the exact same thing on a couple of 2168, even ordered the same replacement fan yesterday 😂. One of mine I picked up in superb condition, supplied with the CRT in original boxes, keyboard etc, but missing the Fort Lock chassis access key so had to order a replacement from a US dealer. I have an unboxing video I am yet to upload. This one is upgraded: I have replaced harddrive with two CF (could not get XTIDE running satisfactorily), and CDROM into sound blaster IDE in same way (as only 1 IDE with two channels on main board), also PC speaker split to the SB. CPU fan for its DX. Then a gotek and a ISA network card. The second machine is not in as good condition, lots of dust and rust to chassis and some green stuff on motherboard, does boot but the PSU 'pumps' for 30 secs or so until it gets up enough steam to fully power on unit. It's this one I am cleaning currently so will have to do some testing on that PSU to see what the issue is. I'm new to restoring old PC, other machines are Amstrad PC1640 and Gateway 2000 G6-300. Thanks very much for your great and instructive videos!
Thanks, Make sure to get those caps out of the kb as soon as possible and clean the PCB with IPA. There are no replacements for the main IC and it will be destroyed by the cap juice. Let me know when the unboxing is out :)
@@Epictronics1 yeah I was thinking of leaving the keyboard fix to a rainy day seeing how tricky it is not to break the fixings inside, but I will bring forward that work! Thanks
With a CPU pin that mangled, I usually just solder on a new one off of a donor CPU rather than spending a ton of time straightening it. You don't even need a microscope to do it on these old CPUs like you do with modern AMD AM4 CPUs since the pins are so large and well-spaced. Still, you did a great job with that mangled pin!
YT just recommended me this channel, great stuff 👍 Also I was never a fan of the non dip package push sockets either, as I had a clone 486 66Mhz machine back in very late 95 I had gotten 2nd hand that my parents helped me upgrade to a Pentium Over Drive 100 Mhz chip, that felt like it was going to snap while putting it in, along with a few other upgrades so I could run Win 95 for my school work till I could save up a few years later when I finally got my first after school job in summer 98 working at a gas station/liquor store by our house, so after working all summer, and then some I ended up building a 550Mhz Super Socket 7 AMD K6-II based system that I used for a few years on Win 98, and 98se, and because of that I have so much love for this era of computing, and it's my 2nd favorite era after having a Commodore 64(later C128), and Apple IIe sitting on the monster 80's wooden computer desk in my bedroom, with an Epson Dot Matrix Printer that worked with both the Commodore, and Apple machines. 😊
My first computer was an IBM PS/1 2131 386SX/16, 2mb Ram, and 80mb HDD. Cost about $1800, and the printer was another $250. Had a 2400bps modem which could use to connect to Prodigy. Color VGA with Windows 3.0
@@Epictronics1 I might be slightly wrong on the model number, as it's been many years, but I'm positive it was a 16MHz CPU and it seems the ones I've found are 20/25Mhz. Perhaps because it was sold by Montgomery Wards (at the time a large US retailer, nearly the size of Sears) it was a special model just for them? They were selling it at the same time as the 286 model with monochrome VGA. This was the first 386 they ever carried (I was also looking at Headstart brand computers which were all 286 as well). It was worth whatever the extra cost I felt to get a 386 (even though SX) and to have color monitor.
@@cliffshockley4406 Quite possible. That is a practice used even today. To avoid price competition, large dealers request uniquely modified PCs from manufacturers. (that's how they can offer a "lowest price guarantee" the sneaky buggers lol. Anyways, really cool with a 386 PS/1, I don't think I have ever seen one IRL
that handle on top looks a lot like later IBM and eventually Lenovo desktops. Current models don't really do it but as recently as the ThinkCentre S30 it had a big nice handle like that, plus one on the back so you could easily lift the whole PC up. More recently on something like the P620 the front is recessed and there's grip extending horisontally from the front.
We had a nearly the same computer, Model 2168. It had 66-MHz 486DX2, and another 4 MB RAM was added in the store besides the factory 4 MB, as well as a 210-MB HDD besides the original 130-MB drive. The CD drive was double speed as well, but I don't remember if it was branded as Creative or Panasonic, or whether it was connected to the sound card or motherboard. (Hmm, now that I think, the two HDD's might have taken all the IDE slots on the motherboards, so probably the CD drive was connected to the sound card (SB16).) I have no experience about PS/2's, so I don't know how much they would have deviated from "standard" IBM compatibles, but for my taste the PS/1 was quite non-standard enough. The main issue was that the expansion card slots are on a riser board, so upgrades by replacing the motherboard would have been impossible; even if a standard motherboard would have fitted in, the cards wouldn't have aligned with the openings in the back. The power switch is a "soft" switch, like on modern computers. (Which means, replacing the power supply with a standard one might be problematic.) The PS/1 has feature named "Rapid Resume", which, with proper DOS drivers, worked like the hibernation feature on more modern (Windows 95 and later) computers. I learned about it when a game (Doom or something like that) crashed and completely hung, and since the computer didn't have a reset switch, I had to use the power button. To my surprise powering off took some time, and when powering back on, the computer returned to the same state as before "powering off", a hung game on the screen. I later learned that holding down the power button will force the computer off without storing the contents of RAM. Also, the floppy drive might be a bit non-standard, so replacing it too could be a problem. (When we got the computer, the indicator light on the floppy drive didn't work, so the seller ordered a new one, and it took some time to arrive, so it might have been some IBM specialty too. So, it'd be best to treat the existing components with care; replacing them with standard ones might not work, or might require extra work and knowledge.
I'll treat it with care for sure. I think the MOBO is LPX standard, but I'm not sure. If I ever have this PC on the bench at the same time as some other LPX, I'll try to swap the MOBOs
This was my first PC in 1994, just a 486dx33 instead. Interestingly it was sold by IBM with the creative 2x CD-ROM and Sound Blaster 16 already installed + good little amped speakers. I even found the original HDD 170Mo 3 days ago and it was still working though noisy 😂Thanks for the video and memories
The design of this PC reminds me of the first computer that I called my own: An IBM Aptiva with a Pentium 100MHz. I know mine was the successor to this line, though.
Yeah they used it initially on the PS/1 in 1990 and continued on the Aptiva which replaced it in 1994, and it remained all the way through the Thinkcentre even after Lenovo's acquisition of IBM's consumer PC division in 2005. Though some of the more recent Thinkcentre towers stopped including the handle in every configuration and made it optional on most models. But over 30 years of the handle is probably the longest running PC design from one vendor.
Wasn't the purpose of the PS/2 line to make a completely proprietary hardware design that would force manufacturers to license the MCA bus? It really wasn't a leap ahead of the existing ISA bus machines coming out around the same time.
yeah, this was a very lucky score. I didn't know the card was in the machine when I got it. I think these cards have some minor issues Duke Nukem 3D, but they are perfect for DOS adventure games : )
@@Epictronics1 Ya I just ran into that bug with 2 SB16's I thought both of them were broken and finally ran into a post about the SB16 and DN3D changed a few settings and both are working just fine. I couldn't believe I had 2 bad SB16's luckily it was just a bug in the software heh.
Thanks for sharing those BIOS part numbers. I've been looking for some bins. Would love to have Tom's version shared somewhere. I have an ODP 75 with 16 KB of cache I want to use in my IBM 2155-54.
I had the same ps1 with a 386 33mhz with a missing front plate. I used the ones to db25 printer port software. Then used some No$gb on it because I did not have a game boy.
I have a very similar machine. 2168-26P. No volume knob and has a Multimedia sticker on the front. 20mb ram and 66mhz processor. Running dos 6.22 and windows 3.11.
Perfect combo for adventure gaming. That's roughly where we are going with this project too. Btw. I have one of those Multimedia stickers on one of my Aptiva desktops. I think it looks neat. It was factory fitted with an IDE CD-ROM drive and an SB16. I don't quite remember what speed and model, we'll find out when it's time to make a video about it
@@Epictronics1 Awesome. Pretty sure the multimedia sticker probably meant the factory Cd-rom and sound blaster card was installed. Same in my machine. The sound card is labeled Sound Blaster Value 16. Another odd thing it has is the math Coprocessor installed. Wonder if it was factory on the multimedia versions. You will have to check yours.
@@Falkenroth1 Two of my Aptivas have the SB 16 value and IBM branded double-speed drives. One of them has a DX2-50 and the other one has a DX2-66 and a Multimedia sticker. I have a third Aptiva, but I don't remember what's inside it. I will pull them all out and make a video
Nice stuff as usual. Be sure to recap that (if I am not mistaken) Teac floppy drive. The motor board specifically with the SMD caps. They tend to leak an I have seen a few A500 drives with destroyed motor boards. PS: Fck ZIP Ram. They are just a blytch. Kisses: An Amiga 3000 wannabe user.
@@Epictronics1 Yes. and that is usually related to timing, and if you remove it, it will try to take off with maximum speed the motor can do when you insert a disk lol
Great video! It seems that around the 4x87 socket there is an extra row and column of pins.... so I wonder are they functional? Is it possible to support pentium overdrive?
I took a close look on the video and couldn't see any traces going to the outer row, so it's possible they were just there to allow the option of using a ZIF socket 2. That being said, the resolution and focus wasn't great in the wide shots of the board, and the close-up macro only had one side in partial focus.
Great vid as always! If you ever want to try to get the zip-memory working,I used this ZIp-ram: HM514260ZP8 for video on the same board sitting in my PS/1 2133, and that worked flawlessly. I also did the CPU bodge on that board after seeing your video on the PS/1 2133. However, I can't find any of those excellent videos any more, have you taken them down?
I don't think these kb have aged badly. Maybe I should have been more clear in the vid. They are not brittle like old Apples. IBM just used way too thin plastics and that's why they are brittle. That is also why they are interesting and give a unique typing experience, it's like typing on a feather light model M :) As long as you don't drop them, they should last fine. That being said, you have to recap them and probably replace a crystal inside. Worse case, the IC is killed by the cap juice. If you can find one, get the caps out immediately and clean the PCB with IPA
It's not uploaded anywhere, send me an email and I'll reply with the file. I'll talk more about it in part 2, but it only removes the error. It doesn't fix the issue
Problematic how? I have a few of them, and they are generally reliable. A few have outlived their lasers, but that can be said of .. well, at this point, _any_ CD-ROM drive.
@@douro20 Hm, interesting. I'll have to test that and see if any of my old drives exhibit that bug. I have both CR-562 and CR-563 drives in that 2x MKE-interface line. The transport mech is almost identical between them, with just a few differences with, e.g., the spindle motor. It could be they patched some firmware issues or carriage extension limitations as well. I would imagine full 650MB discs weren't super common in the first few years of prolific CD-ROM adoption, and at least, I never ran into that -- that I'm aware of. :-D
What about putting for now on part 1 and part 2 in your video’s sothat we will know whether a video about about a certain subject is complete are only part of snother video,other then that, great attempts to restoring stuff.
@@Epictronics1 God consider electronics, technology, Twitter, etc to be tools of the Devil. 1000's of years ago in Jerusalem, there was no corrupting technology.
mmmm LPX form factor. Total crap design. I have an LPX motherboard machine and it has some unique challenges. Glad they stopped using this form factor.
14:57 - I ran into so many weird sockets/slots/connectors back in the day that I never figured out as they were rarely used and now in 2023 I'm watching these retro channels, having my mind blown to finally discover their purposes and that there are still parts to fit them floating around out there.
AliExpress and eBay are awesome resources to find weird and odd stuff like these vertical VRAM chips. And they are just as fun to mess around with today, as back in 1993 :)
You know what. I skipped this video because I thought it was an April Fool's joke based on the title and because it was April 1st. I had already seen so many April Fool's videos that day I was just too tired of them. Then I just watched part 2 and find out, this wasn't an April Fool's joke. So here I am to catch up. I guess the joke was on me!
haha, that is hilarious 😅
I love these solid IBM machines, well... except when they try to use some weird proprietary connectors XD
Hey Epitronics!
I have one of these IBM PS/1 computers just like yours, except I think mine is a slightly newer version. Mine has all four ram slots already installed, but it only has four instead of eight cache slots. Also my co processor slot is Zero Insertion Force and says IBM OVERDRIVE Ready. Otherwise I think the board is the same. I might come back and comment on this comment if I find other oddities.
EDIT 1
I notice your Cyrus Logic graphics chip is the GD5424. Mine is different, being a Cyrus Logic GD5426. Also my board came with a full 1mb video ram soldered on. My board does not have the strange single inline socket yours has for video memory. The date code of the chip is the 14th week of 1993. Which mirrors the date on many other chips on my board.
Additionally, I noticed that my BIOS part number is different. Yours is 65g9498. Mine is 52g2974 IBM Corp, 1993 All rights reserved PF3A.
Regarding the resistors you hack in a later video to change the bus speed. R174, R175, and R176. My board is configured from the factory to where R174 and R175 are pulled low. That is the same configuration you used when you put a DX2 66 in the second slot.
It's really interesting how IBM simply reconfigured one board across multiple computers to fit multiple hardware specifications. I conclude that I REALLY like this motherboard.
About bent pins: some time ago I found an AMD K6-2 450MHz with few corroded pins which just fell off so I used dremel to clean corrosion and soldered new pins made of cutted resistor legs and it is working fine so it is not a big problem to fix something like this.
There was actually a fair amount of bible/religious software and games, much of which came out in the multimedia era that this PC came from. I remember Foone had a couple of Twitter threads about bible games, but I can't find it in their wiki. Hopefully if they didn't wipe the drive, you might be able to find some of those games/software on there.
I'll have a look :)
Nice machine, and great video as always! Thanks for the shout out!
Thanks, I didn't have a mechanical pencil at hand, but apparently desoldering needles work well too
@@Epictronics1 ya, those needles look awesome!
Ya i’ve bent a pin before on this style cpu pins on a mac. Very simillar, they are suprisingly robust and can generally be bent back once without too much stress. But bend it again, the stress fractures are too much and it’ll prolly be time for plan B.
If you do need to solder a new pin, i love how there’s such a large pad to work with.
I managed to solder back a missing pin ones on a 486. I was very surprised that it worked
Ah, Intel's famous LIF socket. LIF = Lotsa Insertion Force. I never liked that socket either, I always felt like I was going to break something either inserting or removing a chip from one.
those needles are actually sold! not that i am a tinkerer as this by far, but did see you can use mechanical pencil tips to straighten those
Upgraded my 486DX2 with that exact sound blaster CD/card combo back in 1993/1994. If memory serves me, it cost a pretty penny back then. The game called the 7th guest is what made me want to upgrade. Fun times!!
Sounds like fun. I didn't play the game back then, but I have a copy now. Maybe I'll try it out on this IBM :)
One of the very first mods I make on old machines, if I don't replace the power supply outright, is to replace the PSU fan. I generally go with fans that have plastic-covered temperature probes, and I attach the probes to the hottest component in the PSU. I did this to an AT PSU in a Tandy 486 about two years ago. It's so quiet, every time I boot it I put my hand behind it to make sure I feel a breeze. These PSU fans pushed so much more air than they needed to for the PSU to keep cool. I've only ever heard the fan spin up once-- it's so unusual it actually startled me for a second.
Built-in fan control? That sounds great! What do I search for to find one of these?
@@Epictronics1 I used Arctic F8-TC and F9-TC fans (80 mm / 92 mm respectively). But, I bought them four years ago and it doesn't look like they make them anymore! I would have bought a bunch had I realized they weren't going to catch on. Maybe eBay has some.
@Epictronics1 They do! They're inexpensive, except for shipping. You're much closer to the UK than I am, so it might be less expensive for you. All told, it would be about $30 USD for me, so about twice the price they were four years ago, but 2/3 of that is shipping across the pond.
@@MSThalamus-gj9oi They seem to be controlled between 32 and 38c. That't great. I'll find on and try it out. Thanks!
Amazing motherboard, with so many upgrade paths! Perfect for us tinkerer! Nice pin repair, I wasn't aware of that tool.
Thanks Tony, it's a really fun board to hack. I think the common tool to use is actually a mechanical pencil :)
I've straightened out a couple of AM2/3 chips one of which was very badly mangled using just a jewellers screwdriver and just by touch since my poor old eyes can't focus on those pins anymore!
12:30 I've never saw such a damper on any floppy drives which I have serviced. Probably way better than smash those heads every time you insert a disk.
yeah, the only other drive I know to have a damper is in another PS/1
With regards to the Panasonic drive, I bought the same drive for either my original 386sx40 or after I upgraded to a dx2/66. Even though it was a Creative branded drive, you could get them on their own as well, I only got mine as they had ran out of Cr562 models in the shop and I had it plugged into a Aztech sound galaxy 16.
What an interesting project! I'm liking that case aesthetic, and looking forward to the next part(s)!
Thanks, and I totally agree, that case looks awesome :)
I'm doing the exact same thing on a couple of 2168, even ordered the same replacement fan yesterday 😂. One of mine I picked up in superb condition, supplied with the CRT in original boxes, keyboard etc, but missing the Fort Lock chassis access key so had to order a replacement from a US dealer. I have an unboxing video I am yet to upload. This one is upgraded: I have replaced harddrive with two CF (could not get XTIDE running satisfactorily), and CDROM into sound blaster IDE in same way (as only 1 IDE with two channels on main board), also PC speaker split to the SB. CPU fan for its DX. Then a gotek and a ISA network card. The second machine is not in as good condition, lots of dust and rust to chassis and some green stuff on motherboard, does boot but the PSU 'pumps' for 30 secs or so until it gets up enough steam to fully power on unit. It's this one I am cleaning currently so will have to do some testing on that PSU to see what the issue is. I'm new to restoring old PC, other machines are Amstrad PC1640 and Gateway 2000 G6-300. Thanks very much for your great and instructive videos!
Thanks, Make sure to get those caps out of the kb as soon as possible and clean the PCB with IPA. There are no replacements for the main IC and it will be destroyed by the cap juice. Let me know when the unboxing is out :)
@@Epictronics1 yeah I was thinking of leaving the keyboard fix to a rainy day seeing how tricky it is not to break the fixings inside, but I will bring forward that work! Thanks
Nice! I found a Creative CR-563-B CD drive just last weekend! Mine is badly in need of some retrobrite work. Great video!
Thanks. The only thing that had yellowed on this IBM was the diskette drive :)
With a CPU pin that mangled, I usually just solder on a new one off of a donor CPU rather than spending a ton of time straightening it. You don't even need a microscope to do it on these old CPUs like you do with modern AMD AM4 CPUs since the pins are so large and well-spaced. Still, you did a great job with that mangled pin!
Thanks, I have soldered a 486 pin ones for a friend, but I didn't try it to know if it held up
YT just recommended me this channel, great stuff 👍
Also I was never a fan of the non dip package push sockets either, as I had a clone 486 66Mhz machine back in very late 95 I had gotten 2nd hand that my parents helped me upgrade to a Pentium Over Drive 100 Mhz chip, that felt like it was going to snap while putting it in, along with a few other upgrades so I could run Win 95 for my school work till I could save up a few years later when I finally got my first after school job in summer 98 working at a gas station/liquor store by our house, so after working all summer, and then some I ended up building a 550Mhz Super Socket 7 AMD K6-II based system that I used for a few years on Win 98, and 98se, and because of that I have so much love for this era of computing, and it's my 2nd favorite era after having a Commodore 64(later C128), and Apple IIe sitting on the monster 80's wooden computer desk in my bedroom, with an Epson Dot Matrix Printer that worked with both the Commodore, and Apple machines. 😊
young turds?
@@Bewefau LOL no You Tube algorithm, but don't get me started on those idiots!! 🙄
Thanks, yeah those sockets are nerve-racking. I grew up with a C64 too :)
My first computer was an IBM PS/1 2131 386SX/16, 2mb Ram, and 80mb HDD. Cost about $1800, and the printer was another $250. Had a 2400bps modem which could use to connect to Prodigy. Color VGA with Windows 3.0
Nice, It must be very rare? I can't find it on google?
@@Epictronics1 I might be slightly wrong on the model number, as it's been many years, but I'm positive it was a 16MHz CPU and it seems the ones I've found are 20/25Mhz. Perhaps because it was sold by Montgomery Wards (at the time a large US retailer, nearly the size of Sears) it was a special model just for them? They were selling it at the same time as the 286 model with monochrome VGA. This was the first 386 they ever carried (I was also looking at Headstart brand computers which were all 286 as well). It was worth whatever the extra cost I felt to get a 386 (even though SX) and to have color monitor.
@@cliffshockley4406 Quite possible. That is a practice used even today. To avoid price competition, large dealers request uniquely modified PCs from manufacturers. (that's how they can offer a "lowest price guarantee" the sneaky buggers lol. Anyways, really cool with a 386 PS/1, I don't think I have ever seen one IRL
My folks had a ps2 386sx, 20mhz, not sure on the ram 1mb? 40mb hd. Built like a tank.
@@pgtmr2713 Nice. PS/2 65SX?
They're called desoldering needles.
Thanks
that handle on top looks a lot like later IBM and eventually Lenovo desktops. Current models don't really do it but as recently as the ThinkCentre S30 it had a big nice handle like that, plus one on the back so you could easily lift the whole PC up. More recently on something like the P620 the front is recessed and there's grip extending horisontally from the front.
yeah, my thinkcenter has something similar, very handy!
We had a nearly the same computer, Model 2168. It had 66-MHz 486DX2, and another 4 MB RAM was added in the store besides the factory 4 MB, as well as a 210-MB HDD besides the original 130-MB drive. The CD drive was double speed as well, but I don't remember if it was branded as Creative or Panasonic, or whether it was connected to the sound card or motherboard. (Hmm, now that I think, the two HDD's might have taken all the IDE slots on the motherboards, so probably the CD drive was connected to the sound card (SB16).)
I have no experience about PS/2's, so I don't know how much they would have deviated from "standard" IBM compatibles, but for my taste the PS/1 was quite non-standard enough. The main issue was that the expansion card slots are on a riser board, so upgrades by replacing the motherboard would have been impossible; even if a standard motherboard would have fitted in, the cards wouldn't have aligned with the openings in the back.
The power switch is a "soft" switch, like on modern computers. (Which means, replacing the power supply with a standard one might be problematic.) The PS/1 has feature named "Rapid Resume", which, with proper DOS drivers, worked like the hibernation feature on more modern (Windows 95 and later) computers. I learned about it when a game (Doom or something like that) crashed and completely hung, and since the computer didn't have a reset switch, I had to use the power button. To my surprise powering off took some time, and when powering back on, the computer returned to the same state as before "powering off", a hung game on the screen. I later learned that holding down the power button will force the computer off without storing the contents of RAM.
Also, the floppy drive might be a bit non-standard, so replacing it too could be a problem. (When we got the computer, the indicator light on the floppy drive didn't work, so the seller ordered a new one, and it took some time to arrive, so it might have been some IBM specialty too.
So, it'd be best to treat the existing components with care; replacing them with standard ones might not work, or might require extra work and knowledge.
I'll treat it with care for sure. I think the MOBO is LPX standard, but I'm not sure. If I ever have this PC on the bench at the same time as some other LPX, I'll try to swap the MOBOs
where is the cross on the pc case ?
The solder tool is called a "solder needle".
Fascinating.
This is the first time I have seen your channel, I like it a lot. I subscribed, I liked, and here is my comment :)
Thanks :)
This was my first PC in 1994, just a 486dx33 instead. Interestingly it was sold by IBM with the creative 2x CD-ROM and Sound Blaster 16 already installed + good little amped speakers. I even found the original HDD 170Mo 3 days ago and it was still working though noisy 😂Thanks for the video and memories
So, these machines were sold with a SB and CD-ROM originally. Good thing you kept it :)
Part 2 here: ua-cam.com/video/kxbkkpe6wfM/v-deo.html
New on patreon.com/Epictronics
Nice work on those pins.
Thanks :)
The design of this PC reminds me of the first computer that I called my own: An IBM Aptiva with a Pentium 100MHz. I know mine was the successor to this line, though.
Nice. I've got one of those lined up for a video too :)
That handle on the case was carried right into the ThinkCentre line, quite interesting.
Yeah they used it initially on the PS/1 in 1990 and continued on the Aptiva which replaced it in 1994, and it remained all the way through the Thinkcentre even after Lenovo's acquisition of IBM's consumer PC division in 2005. Though some of the more recent Thinkcentre towers stopped including the handle in every configuration and made it optional on most models. But over 30 years of the handle is probably the longest running PC design from one vendor.
I didn't give it much though until now. you're right
So how is this a Priest's computer? I was watching to show my friend who's a pastor and no mention anywhere.
He says in the intro he got it from a church
You sure that that PC isn't possessed??!! Maybe that's why it's in a church and BOLTED DOWN so it can't levitate into the air! 😵😲😁
Haha, I'd better watch out!
A BIC pen can also be used to straighten pins. I use to straight out pins on 486's and Pentiums all the time.
I would have thought of using a mechanical pencil.
Yeah, that's what bbb used in his video
I had one exactly the same but the CPU was IBM Blue Lightning 486 equivalent.
Nice, I think they are pretty rare and expensive nowadays.
Wasn't the purpose of the PS/2 line to make a completely proprietary hardware design that would force manufacturers to license the MCA bus? It really wasn't a leap ahead of the existing ISA bus machines coming out around the same time.
Yes, they introduced VGA, PS2 connectors, and a bunch of other stuff but failed to patent everything but the MCA Bus
IBM did NOT skimp on the steel.
Maybe put a bit of solder onto the double bent pin, to stabilize and smoothen it a bit.
I don't know. the socket is very easy to destroy if the pin gets too thick
Those are desoldering needles, or at least that's what I've been told that they are.
@3:24, I guess not everyone was paying attention to "thou shalt not steal," eh?
Yeah, one would think a gaming rig would be safe in a church?
That is the same CD-ROM drive of a 3DO !
I had to google. I think you're right
Lovely find that. :)
That priest had good taste when it came to FM synthesis : )
I bought one of them sound cards about a couple of years ago, cost me over £100 but well worth it. Mine doesn’t have the hanging bug either.
yeah, this was a very lucky score. I didn't know the card was in the machine when I got it. I think these cards have some minor issues Duke Nukem 3D, but they are perfect for DOS adventure games : )
@@Epictronics1 Ya I just ran into that bug with 2 SB16's I thought both of them were broken and finally ran into a post about the SB16 and DN3D changed a few settings and both are working just fine. I couldn't believe I had 2 bad SB16's luckily it was just a bug in the software heh.
@@Neodra Excellent :)
Thanks for sharing those BIOS part numbers. I've been looking for some bins. Would love to have Tom's version shared somewhere. I have an ODP 75 with 16 KB of cache I want to use in my IBM 2155-54.
I sent an email to the guys that have the PS/1 website but didn't get a reply. Where else would be a good place to upload these ROMs?
Trying to suggest a place but my reply is always removed.
@@LuisGuzmanJr Ah, ok, YT has some issues with links. Please send an email instead epictronicsyt@gmail.com
I had the same ps1 with a 386 33mhz with a missing front plate. I used the ones to db25 printer port software. Then used some No$gb on it because I did not have a game boy.
I have a very similar machine. 2168-26P. No volume knob and has a Multimedia sticker on the front. 20mb ram and 66mhz processor. Running dos 6.22 and windows 3.11.
Perfect combo for adventure gaming. That's roughly where we are going with this project too. Btw. I have one of those Multimedia stickers on one of my Aptiva desktops. I think it looks neat. It was factory fitted with an IDE CD-ROM drive and an SB16. I don't quite remember what speed and model, we'll find out when it's time to make a video about it
@@Epictronics1 Awesome. Pretty sure the multimedia sticker probably meant the factory Cd-rom and sound blaster card was installed. Same in my machine. The sound card is labeled Sound Blaster Value 16. Another odd thing it has is the math Coprocessor installed. Wonder if it was factory on the multimedia versions. You will have to check yours.
@@Falkenroth1 Two of my Aptivas have the SB 16 value and IBM branded double-speed drives. One of them has a DX2-50 and the other one has a DX2-66 and a Multimedia sticker. I have a third Aptiva, but I don't remember what's inside it. I will pull them all out and make a video
Nice stuff as usual. Be sure to recap that (if I am not mistaken) Teac floppy drive. The motor board specifically with the SMD caps. They tend to leak an I have seen a few A500 drives with destroyed motor boards.
PS: Fck ZIP Ram. They are just a blytch. Kisses: An Amiga 3000 wannabe user.
There seems to be only one electrolytic cap in this drive. I'll order some and replace it next time I have the drive out, thanks
@@Epictronics1 Yes. and that is usually related to timing, and if you remove it, it will try to take off with maximum speed the motor can do when you insert a disk lol
@@LynxCarpathica Sounds like fun, maybe I'll try that first :)
@18:30 a minicanal pencil works great too 0.05 better then 0.07. got a messed up 387 of eBay for 99 cents and bent it back to shape
Super cool!
Thanks
Great video! It seems that around the 4x87 socket there is an extra row and column of pins.... so I wonder are they functional? Is it possible to support pentium overdrive?
I took a close look on the video and couldn't see any traces going to the outer row, so it's possible they were just there to allow the option of using a ZIF socket 2. That being said, the resolution and focus wasn't great in the wide shots of the board, and the close-up macro only had one side in partial focus.
Thank you. I'll check the traces
@@UpLateGeek I'll check
Great vid as always! If you ever want to try to get the zip-memory working,I used this ZIp-ram: HM514260ZP8 for video on the same board sitting in my PS/1 2133, and that worked flawlessly. I also did the CPU bodge on that board after seeing your video on the PS/1 2133. However, I can't find any of those excellent videos any more, have you taken them down?
Thank you. Yes, but this mini-series replaces my 2133 videos since it has an identical board
i just LOVE to see someone stick a fort in psu ROFL lol i already seen someone done it with toaster lol
As usual very fun!
Thanks :)
You run out of time so quickly!
Are the keys very fragile when they were made or is it because they dry out over time?
I don't think these kb have aged badly. Maybe I should have been more clear in the vid. They are not brittle like old Apples. IBM just used way too thin plastics and that's why they are brittle. That is also why they are interesting and give a unique typing experience, it's like typing on a feather light model M :) As long as you don't drop them, they should last fine. That being said, you have to recap them and probably replace a crystal inside. Worse case, the IC is killed by the cap juice. If you can find one, get the caps out immediately and clean the PCB with IPA
Could you link to where you found the hacked bios? I have a ps/valuepoint 425 which seems to have an identical bios
It's not uploaded anywhere, send me an email and I'll reply with the file. I'll talk more about it in part 2, but it only removes the error. It doesn't fix the issue
TRY SQUEEZING THE BENT PINS WITH NEEDLE NOSE PLIERS TI FINISH THE STRAIGHTENING JOB
I actually did that off-camera :)
Those CD-ROM drives are known to be problematic. The ATAPI version is much more reliable.
yeah, I have stacks of CD-ROM drives, but I like having one of these early "weird" drives in the collection. I hope it works!
Problematic how? I have a few of them, and they are generally reliable. A few have outlived their lasers, but that can be said of .. well, at this point, _any_ CD-ROM drive.
@@nickwallette6201 I remember them having trouble reading past 600 megabytes on a
CD-ROM disc. I believe the issue may have been firmware related.
@@douro20 Hm, interesting. I'll have to test that and see if any of my old drives exhibit that bug. I have both CR-562 and CR-563 drives in that 2x MKE-interface line. The transport mech is almost identical between them, with just a few differences with, e.g., the spindle motor. It could be they patched some firmware issues or carriage extension limitations as well. I would imagine full 650MB discs weren't super common in the first few years of prolific CD-ROM adoption, and at least, I never ran into that -- that I'm aware of. :-D
Secure wipe that HD :p
Exelente reseña 👌
Thank you :)
Great✌
What about putting for now on part 1 and part 2 in your video’s sothat we will know whether a video about about a certain subject is complete are only part of snother video,other then that, great attempts to restoring stuff.
Interesting, like!
Thanks :)
A priest that cherishes The Bible has no business using technology like PCs or tablets or smartphones. God would not approve.
I'm pretty sure god approves of this awesome vintage IBM
@@Epictronics1 God consider electronics, technology, Twitter, etc to be tools of the Devil.
1000's of years ago in Jerusalem, there was no corrupting technology.
mmmm LPX form factor. Total crap design. I have an LPX motherboard machine and it has some unique challenges. Glad they stopped using this form factor.
Remember don't copy that floppy...