From memory that menu (4-Quad)was available on the first PS/1s with the psu in the monitor and booted from rom with PC Dos 4.01 also in rom. Models 2011 and 2121-

These certainly weren't your run of the mill x86 type. Proprietary hdd and fdd connections, ram expansion etc. Thank goodness IBM saw the light and went back to their roots given the user ISA based systems. PS/ValuePoint systems were quite good as well run parallel with the PS/1s with no silly fragile flap in the front. If IBM had opened up it's MCA arch things may have been different.

Does anyone have that MSDos 6.x version of 4-Quad that ran from the hdd? Filename was 4QUADMS6.EXE
Seems the file got changed to 4QUAD6-2.EXE and can be found at https://ps1stuff.wordpress.com/download/downl … -for-type-2121/ along with a lot of PS/1 related stuff.

If anyone is interested I've just located the OS/2 2.0 and PC Dos 5.0 restore images for quite a few PS/1 systems. See bottem of this post. Systems covered:

IBM Software FRU 93F2368 for Spring'92 IBM PS/1 systems. Refered to as "Software Level 1" for US in the service documentation. Composed of: OS/2 2.0, Microsoft Works for Windows, PRODIGY, PS/1 Club. Used on the PS/1 2133/2155/2168 configurations: W72, W76, S75, S76, G76, G77. Recovery Disk - 34G1537 Disk 1 - FRU: 34G1540 Disk 2 - FRU: 34G1543 Disk 3 - FRU: 34G1546 Disk 4 - FRU: 34G1549 Disk 5 - FRU: 34G1552 Disk 6 - FRU: 34G1555 Disk 7 - FRU: 34G1558 Disk 8 - FRU: 34G1561 Disk 9 - FRU: 34G1564 Disk 10 - FRU: 34G1567 Disk 11 - FRU: 34G1570 Disk 12 - FRU: 34G1573 Disk 13 - FRU: 34G1576 Disk 14 - FRU: 34G1579 Disk 15 - FRU: 34G1582 Disk 16 - FRU: 34G1585 Disk 17 - FRU: 34G1588 Disk 18 - FRU: 34G1591 Disk 19 - FRU: 34G1594 333Disk 20 - FRU: 34G1597
Manufacturer: Ibm Corp.

IBM Software FRU 93F2367 for Spring'92 IBM PS/1 systems. Refered to as "Software Level 1" for US in the service documentation. Composed of: Windows 3.1, DOS 5.0, Microsoft Works for Windows, PRODIGY, Promenade, PS/1 Club Used on the PS/1 2133/2155/2168 configurations: G11, G13, G14, G43, G44, G50, G53, G54, G76, G77, G78, P57, P71, S11, S13, S14, S43, S44, S53, S54, S75, S76, S78, W11, W13, W14 Recovery Disk - 33G4041 Disk 1 - FRU: 33G4045 Disk 2 - FRU: 33G4049 Disk 3 - FRU: 33G4053 Disk 4 - FRU: 33G4057 Disk 5 - FRU: 33G4061 Disk 6 - FRU: 33G4065 Disk 7 - FRU: 33G4069 Disk 8 - FRU: 33G4073 Disk 9 - FRU: 33G4077 Disk 10 - FRU: 33G4081 Disk 11 - FRU: 33G4085
Manufacturer: Ibm Corp.

NOTE-Found site with all the restore software https://ps1stuff.wordpress.com/download/downl … -for-type-2133/

red_avatar wrote:

It's rather ridiculous to see how each system only "survived" for two years but those were the crazy 90's, where anything you bought was obsolete by the time you got home!

Most folk never replaced their systems every two years. If you weren't a geek/gamer, or some hardware failure, or software they need to use wouldn't run on their current setup. They either did incremental upgrades or replaced the system around the 4-5 year mark. Some kept systems for a lot longer because their setups were doing the job intended of them.

SpectriaForce wrote:

Does the DX4 Overdrive run at 100MHz? When this pc was designed, that CPU was not released yet.

By the way; upgrading the RAM to 64MB is useless unless you are going to use Windows 95 with a memory hungry database or CAD program 😉

Once upon a time was this operating system called OS/2 2.x released around 1992-93, with boot loader which would have run quite nicely. You musta heard of it as it was in all the PC rags. It was a kinda 3 in one OS with OS/2, Win3.x and Dos support. Used quite a lot in the BBS scene to run multiple nodes. Funny thing is OS/2 v3 would run even better. Hell you could even run some sort of *nix on it on the OPs setup just for the hell of it using all the ram it could grab.

SpectriaForce wrote:

Does the DX4 Overdrive run at 100MHz? When this pc was designed, that CPU was not released yet.

By the way; upgrading the RAM to 64MB is useless unless you are going to use Windows 95 with a memory hungry database or CAD program 😉

Yes, it does work at 100mhz. You need to remove jumper 37 on the motherboard which controls the CPU bus speed to run at either 25mhz with the jumper on or at 33mhz with the jumper off. And configure jumpers 24, 25, 31 for Overdrive CPU. I have it working with the 64mb of ram and 256kb cache. And 728mb IBM hard-drive.

That is pretty much maxed out according to the computer specs.
Runs good and stable. Nice 486 computer.

Caluser2000 wrote on 2019-08-18, 23:59:

From memory that menu (4-Quad)was available on the first PS/1s with the psu in the monitor and booted from rom with PC Dos 4.01 also in rom. Models 2011 and 2121-800px-IBMPS1.jpg These certainly weren't your run of the mill x86 type. Proprietary hdd and fdd connections, ram expansion etc. Thank goodness IBM saw the light and went back to their roots given the user ISA based systems. PS/ValuePoint systems were quite good as well run parallel with the PS/1s with no silly fragile flap in the front. If IBM had opened up it's MCA arch things may have been different.

I actually like the covers IBM put on the PS/1 and Aptiva computers. It give the computer a clean simple look.
After you get them all setup you really don't use the drives much.
Also the covers keep dusts from getting into the floppy drives.

Yes, the flap cover on the IBM PS/1 is its only flaw as it's hing tends to break.
I am looking into making some sort of replacement hing either with a metal 3D printer or plastic 3D printer.
But the rest of the case is made of strong metal.

I just have to say. These IBM PS/1’s from 1993/94 are some really good OEM computers.

Reasons:
Good quality all steel cases.
Easy to open and repair.
NON-OEM components. Accepts 3rd party components. But IBM components are best.
Easy to upgrade
Manuals and docs are well detailed.
Well thought out and designed. These are the pinnacle of the IBM 486 computers for the consumer.
IBM Menu system is really nice and convenient.
IBM recovery tools are really good.
These are my favorite OEM 486 computers.

This is the Cadillac of the 486 computer.

Wow, I congratulate this topic, since it has brought me great memories.

15 years ago I did an upgrade to my 486 with 64mb of ram and a dx2 processor of 66. and with the feat of installing windows 2000 !!. After that it was forgotten.

Thanks to this topic I read yesterday, I started buying all the updates that I missed 15 years ago mentioned here (cache memory). and 100mhz dx4 overdrive.

The only difference I see between the motherboard here and mine is that I have a zif socket to expand the video memory of the cirrus logic chip. Does anyone have knowledge of how this expansion chip could be?

What do I want to do that for? Because I am currently a technological architect. and it all started with this pc that was my teacher and instructor in this way of computing.

Currently with all these new updates, I will give you the use of giving me support in the programming of eeproms to repair arcade plates in my laboratory.

Regards!!

etoromu wrote on 2020-03-04, 15:02:

Wow, I congratulate this topic, since it has brought me great memories. […]
Show full quote

Wow, I congratulate this topic, since it has brought me great memories.

15 years ago I did an upgrade to my 486 with 64mb of ram and a dx2 processor of 66. and with the feat of installing windows 2000 !!. After that it was forgotten.

Thanks to this topic I read yesterday.

Regards!!

Yes, There where at least 6 0r 7 different variants of the IBM PS/1 model 2133.
The last one being the Multimedia edition. Which came with a Sound Blaster Ct1740.
But you can use a CT1770 also.
You may need a 169 pin Intel 486 Overdrive CPU if you have the “IBM PS/1 Consultant” model.
I tried other CPU’s like AMD and they will not work.
And the IBM disk image for 1994.
IBM PS/1 consultant restore.

Intel486dx33 wrote on 2020-03-04, 16:28:

Yes, There where at least 6 0r 7 different variants of the IBM PS/1 model 2133. The last one being the Multimedia edition. Which […]
Show full quote

etoromu wrote on 2020-03-04, 15:02:

Wow, I congratulate this topic, since it has brought me great memories. […]
Show full quote

Wow, I congratulate this topic, since it has brought me great memories.

15 years ago I did an upgrade to my 486 with 64mb of ram and a dx2 processor of 66. and with the feat of installing windows 2000 !!. After that it was forgotten.

Thanks to this topic I read yesterday.

Regards!!

Yes, There where at least 6 0r 7 different variants of the IBM PS/1 model 2133.
The last one being the Multimedia edition. Which came with a Sound Blaster Ct1740.
But you can use a CT1770 also.
You may need a 169 pin Intel 486 Overdrive CPU if you have the “IBM PS/1 Consultant” model.
I tried other CPU’s like AMD and they will not work.
And the IBM disk image for 1994.
IBM PS/1 consultant restore.

Thank you very much for the data, I just bought the cache memory and I'm about to buy the overdrive processor.
This weekend I will take pictures of my motherboard so they can advise me in a better way. Thanks a lot!

I could ask my sister to send me some photos of my ps / 1 to share. in them you can see the motherboard and the zif socket to expand the video memory. In addition, I ask if the overdrive dx4odpr100 processor works for this board. Regards!!

Intel486dx33 wrote on 2019-08-14, 23:03:

What is the best solution to clean this yellowed plastics with ?
It’s just the CDROM that has yellowed.

Have you done anything about this yet? I have been tinkering with my retrobrighting setup, and working on restoring a new-to-me AST Advantage! 824 mini tower. Here's my process:

1) It is amazing how much a simple cleaning does. First, I use some degreaser in a spray bottle -- not sure what brand. I can check later, but any household gunk cleaner will do. That stuff cuts through the layers of blech that settles on the case when they get left in a garage, basement, or attic for 10-20 years. After a good scrubbing, it already usually looks significantly better.

2) Next, a little touch-up with a Magic Eraser. Not too much -- don't ruin the texture. Just get those scuffs out, and a little of the grime caught in the texture itself. By now, it's looking presentable, if not color-correct.

3) File or sand down some of the rough edges. If you have a bruise somewhere that left a gouge in the plastic, judicious application of a file, Xacto knife, or a bit of sandpaper can smooth the edges of the defect to where it's not so noticeable. Be careful not to go too wide, otherwise it'll end up a big dull patch instead -- which is not better. Just take down the edge and let the wound disappear under anything less than scrutiny.

4) OK, now about that yellowing... I bought a plastic tub with a footprint large enough to drop in the front panel of my largest case. Then, I hit a couple local home stores and bought out their stock of 3% hydrogen peroxide bottles. They go for about $1 apiece, so 10-15 isn't an unreasonable place to start. Now we just need UV.

My first thought was to get a reel of UV LED strip tape, but that did not work so well. For one, you have to power it. Not too bad, since they usually provide a barrel DC jack pre-connected, and it just needs 12VDC. Easy enough. But, for one, the tape I used was covered in a silicone sealant, making it difficult to cut and solder together with jumper wires. Then, it turns out +12.0VDC is a little too much -- they got hot, started browning the LEDs, and I have no doubt they would fail after not that much use. Finally, I had used the adhesive backing to mount them to the lid of the tub. Predictably, it did not hold, and I lost about 1/3 of the strip when it fell into the hydrogen peroxide and electrolysis'd the jumper wires to corroded hunks of uselessness. So, scratch that idea.

Take two: 8-bit Guy showed some UV panels he got, and it turns out they're readily available on Amazon in just about every configuration you could want. So I got qty. 2 of the 30W panels. They have a built in AC power supply, heatsinks, and a convenient mounting bracket. I used a DJ lighting truss to screw them into, but any old lighting truss you have lying around will do. 😉

With 2x30W panels and 3% H2O2, it took about 2 days to get 90% back to original color on a panel I had previously removed from an Enlight case (just a handy test subject that was heavily yellowed.) I've left it in for a few extra days, and it's ... a little better perhaps. I'm not sure 100% restoration is possible, but frankly, the turn out so far is honestly fine by me. I just want to see what was possible.

Here's a before/after shot around day 2:

You can get faster results with concentrated peroxide, but let me just say this: It does not appear so far that you can easily overdo it with this method. I value predictability and doing no harm to the product as key criteria. I can wait a week if I need to. I don't want to ruin an otherwise good panel trying to race to the finish line.

I started this process Saturday afternoon, it's now Wednesday afternoon, and it seems to be getting to the point of diminishing returns. I don't expect it will be much better tomorrow, but more importantly, it is not marbling, streaking, or getting any worse. At some point, I will need to do laundry though.

I have a problem with my Ps1 upgrade, the DX4odpr100 without cache memory works perfectly, but with the cache memory run slow.

etoromu wrote on 2020-05-30, 04:00:

I have a problem with my Ps1 upgrade, the DX4odpr100 without cache memory works perfectly, but with the cache memory run slow.

Did you set the motherboard jumpers for a 486dx2-33 CPU ?
Did you change the cache jumpers for the amount of cache you are using ?
You also need to enable/disable cache in bios settings.

See manual for your motherboard type and jumper settings
http://ps-2.kev009.com/pccbbs/aptiva/63g2028.pdf

Intel486dx33 wrote on 2020-05-30, 07:28:

Did you set the motherboard jumpers for a 486dx2-33 CPU ? Did you change the cache jumpers for the amount of cache you are using […]
Show full quote

etoromu wrote on 2020-05-30, 04:00:

I have a problem with my Ps1 upgrade, the DX4odpr100 without cache memory works perfectly, but with the cache memory run slow.

Did you set the motherboard jumpers for a 486dx2-33 CPU ?
Did you change the cache jumpers for the amount of cache you are using ?
You also need to enable/disable cache in bios settings.

See manual for your motherboard type and jumper settings
http://ps-2.kev009.com/pccbbs/aptiva/63g2028.pdf

Thank you very much for the help, I have followed the manuals and I have even supported myself with the configuration of jumpers on your board. however the problem persists. I have taken pictures with the cache installed and others where I only removed the tag memory and setting the cache to 0, the processor and the bus work perfectly. I really don't know what else I could do.

etoromu wrote on 2020-05-30, 22:18:

Intel486dx33 wrote on 2020-05-30, 07:28:

Did you set the motherboard jumpers for a 486dx2-33 CPU ? Did you change the cache jumpers for the amount of cache you are using […]
Show full quote

etoromu wrote on 2020-05-30, 04:00:

I have a problem with my Ps1 upgrade, the DX4odpr100 without cache memory works perfectly, but with the cache memory run slow.

Did you set the motherboard jumpers for a 486dx2-33 CPU ?
Did you change the cache jumpers for the amount of cache you are using ?
You also need to enable/disable cache in bios settings.

See manual for your motherboard type and jumper settings
http://ps-2.kev009.com/pccbbs/aptiva/63g2028.pdf

Thank you very much for the help, I have followed the manuals and I have even supported myself with the configuration of jumpers on your board. however the problem persists. I have taken pictures with the cache installed and others where I only removed the tag memory and setting the cache to 0, the processor and the bus work perfectly. I really don't know what else I could do.

The images without tag memory

CPU setup looks to be working fine. Follow the process of elimination. The Cache chips appear to be the problem.
Do you have other cache chips to test with ?

Look here:
https://www.ebay.com/itm/256k-cache-lot-10pc- … LMAAOSw~w5eU1nw

You can use one for the TAG too.

You should be using all the same chips even for the TAG.

Intel486dx33 wrote on 2020-05-30, 07:28:

etoromu wrote on 2020-05-30, 04:00:

I have a problem with my Ps1 upgrade, the DX4odpr100 without cache memory works perfectly, but with the cache memory run slow.

Did you set the motherboard jumpers for a 486dx2-33 CPU ?

Can you show me a picture of this mythical 486dx2-33 cpu please?

Intel486dx33 wrote on 2020-05-31, 01:02:

CPU setup looks to be working fine. Follow the process of elimination. The Cache chips appear to be the problem. Do you have oth […]
Show full quote

CPU setup looks to be working fine. Follow the process of elimination. The Cache chips appear to be the problem.
Do you have other cache chips to test with ?

Look here:
https://www.ebay.com/itm/256k-cache-lot-10pc- … LMAAOSw~w5eU1nw

You can use one for the TAG too.

You should be using all the same chips even for the TAG.

I only have 10 chips that I bought on ebay a while ago, I bought these taking as reference the photographs of your board since they were 20ns. Attached are photos of the ad and one next to me.

Caluser2000 wrote on 2020-05-31, 01:24:

Intel486dx33 wrote on 2020-05-30, 07:28:

etoromu wrote on 2020-05-30, 04:00:

I have a problem with my Ps1 upgrade, the DX4odpr100 without cache memory works perfectly, but with the cache memory run slow.

Did you set the motherboard jumpers for a 486dx2-33 CPU ?

Can you show me a picture of this mythical 486dx2-33 cpu please?

These computers came with a 486sx-25. The Intel overdrive CPU works best with 486dx2-33 settings.
So he needed to change the BUS speed to 33mhz and CPU type to 486dx2 or Overdrive CPU.

Caluser2000 wrote on 2020-05-31, 01:24:

Intel486dx33 wrote on 2020-05-30, 07:28:

etoromu wrote on 2020-05-30, 04:00:

I have a problem with my Ps1 upgrade, the DX4odpr100 without cache memory works perfectly, but with the cache memory run slow.

Did you set the motherboard jumpers for a 486dx2-33 CPU ?

Can you show me a picture of this mythical 486dx2-33 cpu please?

This is currently my refurbished IBM ps1 2155 CPU, I thank the user Intel486dx33 for motivating me to restore my precious computer again.