Re: The 286 Laptop Restoration Thread

Posted on 2021-03-15, 22:46

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So, after months of measuring, verifying and ordering a lot of new components and de- and resoldering 90% of the board I now have a working T1600 and a working T1600/40. This is amazing. I'm looking forward to inspecting my board and seeing if anything you've discovered helps. I have reached the …

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Re: 486DX/50 EISA Build

Posted on 2021-03-15, 20:51

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I used a small file to wear away the area between the missing legs, then attached the battery holder and then soldered the wires. Works perfectly now. I will also dismantle the fake RTC 'chip' and see what is inside. Did you make sure to disconnect the internal battery as in cut away the metal …

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Re: 486DX/50 EISA Build

Posted on 2021-03-15, 19:32

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by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In that case so is NT 3.51 as both NT 4.00 + 3.51 have a specified minimum requirement of 12 MB Yes, I'm aware as my original post says. It's merely an option in the future if I can obtain more. I've got original media for NT4, but I have little interest in it on this platform. Nice. I think you …

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Re: 486DX/50 EISA Build

Posted on 2021-03-15, 12:50

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I find my NT4 systems will just about run walk with 32MB, but feel 64MB is a sensible minimum Because I literally only have 8MB RAM, so NT4 is out by default. I don't need the extra storage space - I'm not building a server. I'm only installing NT in the first place because I've never used 3.x. …

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Re: 486DX/50 EISA Build

Posted on 2021-03-15, 00:48

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It might be too late, but can you please take a photo of the board where it's not cropped and without anything in front of it so we can add it to the base ? (pretty much the same photo as the 1st one but with the entire board in the frame). A BIOS dump would be nice too (if you need help for that, …

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486DX/50 EISA Build

Posted on 2021-03-15, 00:25

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I obtained, by accident, an EISA motherboard 4 years ago and its taken me this long to acquire the parts and find the time to make it happen. Despite working with 486 systems since they came out, I have never worked with EISA so I expect a bit of learning. The motherboard is a TMC PET48PN like the …

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Re: TMC PET48PN EISA+VL Motherboard 50 Mhz bus testing

Posted on 2021-03-13, 01:05

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by brassicGamer

in Marvin \ System Specs

in Marvin \ System Specs

I've had one of these boards for a few years, but am only just starting to build a system around it now. But it won't POST. I've verified that all the jumpers and resistor networks are configured correctly. I'm using a DX/50, which has been tested in another 486 board, along with the parity RAM and …

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Re: Bought these (retro) hardware today

Posted on 2021-02-08, 11:48

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This oddity. Am creating a schematic so I can work out the bus pinout. It does seem to support parity, but the hi and lo data lines are combined so I'm guessing that means the banks can be switched between but not accessed simultaneously, effectively stimulating 16-bit bandwidth? Possibly from a …

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Re: Everything You Wanted To Know About Tualatin

Posted on 2021-01-20, 12:57

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by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

But in that thread there is also this comment: [Flu!d said: 02-05-02 02:21 AM // The Tualatin Celeron (P3) has data prefetch enabled, and the cache latency of 1 in no way seems to hinder peformance as far as I can tell through excessive benchmarking and use of this processor - In fact it only seems …

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Re: Everything You Wanted To Know About Tualatin

Posted on 2021-01-20, 12:48

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Warlord wrote on 2021-01-17, 15:14: brassicGamer wrote on 2020-10-02, 20:38: [*]Intel won the GHz war, by releasing their 1GHz Pentium III a month before AMD's Athlon. This is historically false. It was more like AMD shipped a 1ghz CPU 2-3 days before Intel did. Correct!

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The First Ever AGP Graphics Card / Chipset

Posted on 2021-01-08, 17:10

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi everyone. I've been at it again researching one particular piece of hardware too much. Following the Everything You Wanted To Know About Tualatin article, I've done a deep-dive into AGP on my blog. Does anyone else have a weird obsession with wanting to know what the first ever of something was? …

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Re: The 286 Laptop Restoration Thread

Posted on 2020-12-06, 21:13

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

FuST, this is incredible work! Honestly, one of the most niche and impressive efforts of reverse-engineering I have seen on these forums - great job. I'm looking forward to diving into the schematic and testing my board. Hopefully we will solve its mysteries.

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Re: The 286 Laptop Restoration Thread

Posted on 2020-11-23, 19:43

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by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have finally retrieved the item. No good news. But first, I checked out Q29 and it has no markings on it, just a small depression in the middle. So I wired it up to my component tester. https://i.imgur.com/KqmOoTP.jpg Seemed easier than desoldering and resoldering the component (I do not have the …

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Re: My Gravis Ultrasound and 16 bit daughter board

Posted on 2020-11-12, 00:31

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by brassicGamer

in Marvin \ Sound

in Marvin \ Sound

After hearing about the daughterboard when I read my first Ultrasound review in 1993/4, I have never seen one until now. I was beginning to think they might have been vapourware!

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Re: The 286 Laptop Restoration Thread

Posted on 2020-10-19, 11:08

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This might be a longshot as you stated your projects are in storage but here it goes: Yes, they are still in storage, sadly, BUT I am planning to go there in the next couple of weeks to grab some stuff so I will let you know the component details ASAP (unless someone else gets there before me of …

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Re: Everything You Wanted To Know About Tualatin

Posted on 2020-10-03, 17:30

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I found a ' source ' that mentions Tualatins being able to cache 64GB of RAM, but it doesn't say where this info came from. The Intel datasheets don't include such info. It is mentioned in this Intel Datasheet [Intel Pentium III Processor with 512KB L2 Cache at 1.11GHz to 1.40GHz - jun 2002] …

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Re: Everything You Wanted To Know About Tualatin

Posted on 2020-10-03, 15:10

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Not only Coppermine-T processors, there is at least 1 regular Coppermine that also comes with IHS, the SL5B3 I didn't want to get into making a list of all the versions that did come with a heatspreader. I think as long as people know that it's included on late Coppermines as well then they can be …

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Re: Everything You Wanted To Know About Tualatin

Posted on 2020-10-02, 23:15

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by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

An interesting "fact" I seem to recall about Tualatin--but can't remember where on earth I read it--is that it can cache up to 64GB of RAM. Coppermine could only cache up to 4GB. And yet another thing I can't seem to remember is if that extra cacheability only applied to PIII-S, or if all Tualatins …

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Re: Everything You Wanted To Know About Tualatin

Posted on 2020-10-02, 23:10

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Nice article. However I don't know if you meant it that way, but it suggests the vrm and AGTL changes are related, which I don't believe to be the case. Also, the voltage clamp on some slotkets is for the so-called non vcore voltages, not AGTL. I don't think any slotket including Powerleap changes …

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Everything You Wanted To Know About Tualatin

Posted on 2020-10-02, 20:38

by

by brassicGamer

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The Tualatin has historically been a bit of a hot topic round these parts and reading up on other people's builds is what introduced me to this legend. It became a bit of an obsession and so I decided to try and get as much as possible into one place regarding this special CPU. I hope that some of …

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