Re: IBM PS/1 model 2155, from stripped to DOOM?

Posted on 2022-02-15, 21:52

by

by ifkz

in Marvin \ System Specs

in Marvin \ System Specs

Thanks for the pep talk, it helps. The direction I am going to go is try to replace all the capacitors on the motherboard. There are not many and it has worked for me before with arcade hardware, not too high of a cost to try out. I remember reading about bad caps in other, earlier PS/1 computers …

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Re: IBM PS/1 model 2155, from stripped to DOOM?

Posted on 2022-02-14, 21:44

by

by ifkz

in Marvin \ System Specs

in Marvin \ System Specs

Yep, it was the RAM! I borrowed the entire stash of RAM from another machine. 16MB total now, which is perfect for a pure DOS/ Windows 3.1 machine IMHO. At power up I was greeted with video! And a whole lot of motherboard errors. I cleared most of these out. Unfortunately, there were two errors that …

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Re: IBM PS/1 model 2155, from stripped to DOOM?

Posted on 2022-02-10, 00:04

by

by ifkz

in Marvin \ System Specs

in Marvin \ System Specs

The CPU, a 486DX2-50Mhz arrived and I carefully pushed it in the slot. There was not much give, so that was a surprise. At first power up, I have both power and hard drive LEDs! The CPU also got a little warm, but not hot to the touch. I have to remember these 486 chips below 66Mhz did not require a …

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Re: Cache memory in an IBM PS/1 model 2155?

Posted on 2022-02-05, 14:42

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ah, so it is telling me I am going to need that chip too, in addition to either one or both banks being populated. Thanks, that helps out and it makes a lot of sense after re-reading it. Now to find some cache to buy for this PC (or at least buy it after I can first power it up). Since I am starting …

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IBM PS/1 model 2155, from stripped to DOOM?

Posted on 2022-02-05, 01:30

by

by ifkz

in Marvin \ System Specs

in Marvin \ System Specs

I was given my first IBM machine: a PS/1 model 2155 not long ago that was stripped down to nearly nothing. I am nearly ready for first power up and I am waiting for and have ordered a CPU for it, a 486-DX 50Mhz since that was missing too. This uses a, I guess you call it a....push-the-CPU-in-socket, …

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Cache memory in an IBM PS/1 model 2155?

Posted on 2022-02-05, 00:47

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I am just about ready to power up my 486 project and my first IBM machine: a PS/1 model 2155. I am waiting on a CPU for it and that is in the mail. The service manual says this shipped with 128K of standard cache, four chips. Two empty banks are there for a max of 256K . Assuming I can get this to …

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Formatting Playstation 2 fat hard drive for use in a 486 build?

Posted on 2018-07-14, 03:12

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I did a quick search and did not find a similar topic, so here goes: Some time ago I rescued six Playstation 2 IDE hard drives from the trash can, these are the type that fit inside of the older PS2's drive bay and interface with the network adapter. Has anyone attempted to format one of these, put …

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Re: Toshiba T5100: installing DOS 6.22 & BIOS help

Posted on 2017-09-04, 02:23

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Reading here: http://www.atarimagazines.com/compute/issue136/68_The_incredible_expan.php it seems I want to move everything possible to Extended Memory and let DOS's EMM386.exe and HIMEM take care of everything from there, just like I am used to doing. Great! I picked EZ-Drive from Phil's Computer …

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Toshiba T5100: installing DOS 6.22 & BIOS help

Posted on 2017-09-04, 01:26

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So, I got the Toshiba gas-plasma bug a few months ago with my earlier T3100; this T5100 came from ebay with a dead hard drive, now replaced with a much later 6GB IDE WD drive. First off, I am unsure of the proper BIOS setup. The system was upgraded and comes with 4096KB of RAM, enough to possibly …

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Re: Toshiba T3100, my earliest x86 PC laptop/luggable!

Posted on 2017-04-18, 20:46

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for the floppy tip! I made some progress with it last night, getting it to (1) read a 720K formatted floppy and (2) start two games from the hard drive; the games being Arknoid and Druglord (the text adventure). I was surprised at how speedy it seems with only a 8Mhz 286. I also tried to load …

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Re: Toshiba T3100, my earliest x86 PC laptop/luggable!

Posted on 2017-04-17, 19:45

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for listing a few other model numbers that have these orange gas-plasma displays; they have been helpful as I look around ebay for a later, more powerful model. Were these a Toshiba only display type, or did other manufacturers use the technology too? Is there a specific model number that is …

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Re: Toshiba T3100, my earliest x86 PC laptop/luggable!

Posted on 2017-04-17, 15:49

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Congrats! The T3100 was my first ever vintage Toshiba portable, it's an awesome little machine. Thanks for the answers Torindkflt and Jo22! The orange glass plasma screen is charming, I had hopes of an oxidized connector that caused the missing screen lines but they are probably permanent as you …

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Toshiba T3100, my earliest x86 PC laptop/luggable!

Posted on 2017-04-16, 03:55

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today I ran across this lug-able computer and I could not resist adding it to my growing vintage x86 computer collection. The specifications I have found: 10MB Hard Drive, 640K RAM, 640x400 amber gas plasma display, and a 720KB floppy drive. The CPU should be a 286 at 7Mhz according to Wikipedia. It …

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Re: DOS Games freezing when disk writing is required

Posted on 2017-02-17, 05:22

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The solid active hard drive light on your system also makes me think replacing the hard drive is a good step. Please let us know if a replacement hard drive fixed the problem or not.

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Re: DOS Games freezing when disk writing is required

Posted on 2017-02-17, 00:53

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I had something that sounds a bit similar. On my 486-66, Duke Nukem 3D would sometimes freeze. When the freeze happens, I began to notice that the hard drive would re-spin up, like it was a fresh PC start from "cold." So, in my case it was a hard drive that was dying in an unusual, inconsistent way. …

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Re: LGR and Bisqwit

Posted on 2017-02-17, 00:29

by

by ifkz

in Marvin \ Video

in Marvin \ Video

I also have to give a shout-out of thanks to LGR for his 486 build. At the time I had been meaning to upgrade my Cyrix 486sldc-40 (386sx-30 equivalent) to run Doom and his build was just the inspiration I needed. After that was done I had the bug and I now have collected a range of vintage 486, …

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Re: Voodoo2 blues, advice?

Posted on 2017-02-10, 00:11

by

by ifkz

in Marvin \ Video

in Marvin \ Video

Thanks Tetrium, glad I took a look at this, I might gain 133Mhz! The CPU is in a slot 1 and has the stamp 533b\512\133\2.0V It has a jumper on 4.5X, and another on Auto (with other options of 66m, 100m, 110m, 124m, 133m, etc) The motherboard is marked as a EP-BX3 One question: is there a favorite …

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Re: Voodoo2 blues, advice?

Posted on 2017-02-09, 16:58

by

by ifkz

in Marvin \ Video

in Marvin \ Video

It is an early Pentium III board, slot 1, with the CPU clock at ~400Mhz (so says the control panel). I am not sure about the brand of the motherboard. It also has an AGP slot, but my ideas about having a Voodoo3 as a substitute were short lived. Not knowing when to quit, I bought two of the 12MB …

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Voodoo2 blues, advice?

Posted on 2017-02-07, 00:47

by

by ifkz

in Marvin \ Video

in Marvin \ Video

A bit of a recap: I had been assembling hardware for a month focusing on creating a Voodoo2 SLI computer based around a Pentium III-400 motherboard & CPU. I first found two "tested" Voodoo2 cards, more on that later. Next came a case with a side-mounted fan to keep the Voodoo2's cool. Add in an SLI …

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Re: New machine: Gateway 2000 Pentium 120!

Posted on 2017-02-01, 14:36

by

by ifkz

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It needs a treatment of retrobrite (or a dunking in peroxide) but I would be happy to take a few pictures of this and all of my machines. Still flipping coins over whether the PCI Banshee should go with this Pentium or the K6. The main project on my to do list is my Voodoo2 SLI rig, no excuses for …

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