Re: 3 (+3 more) retro battle stations

Posted on 2022-11-04, 07:31

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

Great information. Learned new things about old things today. A frankenboard for sure, but an interesting one. (I notice you are attracted to these, eh ?) Btw, the yellow bars make it hard to see the overlaid white numerical values. --- Apparently LuckyStar went overboard with the cost cutting of …

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Re: 3 (+3 more) retro battle stations

Posted on 2022-11-02, 06:51

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

That constant 3-1-3 wait states situation does not sound encouraging. Looks like a motherboard limitation. Can be related to the 1Mb L2 cache size. Recently hit another board like this. 1Mb L2 cache - 313. 256Kb - 212. Asus PVI-486SP3 latest revision 1.22 is simply great (as stated numerous times …

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Re: 3 (+3 more) retro battle stations

Posted on 2022-11-01, 16:55

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by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

@Anonymous Coward The NEST models are rare. Recently saw one as part of an entire computer for way over $2000 - unreasonable price for useless old stuff. Was thinking to swap the reference 14.31816MHz oscillator with a faster one and see what happens. The high-mark in this regard (in my opinion) is …

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Re: Creating a voltage regulated 386 BL3 module from existing parts

Posted on 2022-11-01, 06:46

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My bad. I meant 310/320/330.

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Re: 3 (+3 more) retro battle stations

Posted on 2022-11-01, 06:25

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

Pravetz CPU-12 also know as Juko ST (super turbo) - an 8088 Turbo XT motherboard. It actually goes by several other names but CPU-12 is written on the silk screen of the one here so i go by that. Apparently a popular hardware back in its day since it still shows-up frequently on ebay. There are at …

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Re: 3 (+3 more) retro battle stations

Posted on 2022-11-01, 00:06

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

Weird BIOS settings, but i also noticed that on some 486 mobos RAS-to-MA (EDIT: initially i mistakenly wrote RAS-to-CAS) must be 2 (or more). Good chance you are hitting less than ideal L2 cache chips, but sometimes the motherboard itself is the limitation. Hard to say really until good effort is …

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Re: 3 (+3 more) retro battle stations

Posted on 2022-10-31, 01:51

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by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

Going to add that QDI guy to the wide POD100 post in the coming days. Do you have WinTune2 results from the now working Windows ? L2 cache is the biggest source of drama with 486 hardware. Didn't keep track of which Socket 3 motherboards handle POD100 directly without the need for voltage …

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Re: 3 (+3 more) retro battle stations

Posted on 2022-10-30, 21:30

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

sounds pretty good. Asus PVI mobos are great, even the early versions. Where did you find it ?

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Re: 3 (+3 more) retro battle stations

Posted on 2022-10-30, 21:00

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

this one looks very interesting. looking forward to what comes out of it, despite your warning hint. forcing L1 cache in write back mode: https://www.vogons.org/viewtopic.php?p=932979#p932979 https://www.vogons.org/viewtopic.php?p=934918#p934918 i am going to post info about 2 more turbo xt …

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Re: 3 (+3 more) retro battle stations

Posted on 2022-10-30, 17:54

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

I think i know what you are talking about, but wouldn't call it massive. Games/apps that are CPU/FPU-light can reach a point where the PCI/VLB bus becomes the bottleneck. Things like Wolf3D and Doom for example. For the rest there is either no difference or arbitrary small advantage for 4x40. The …

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Re: 3 (+3 more) retro battle stations

Posted on 2022-10-30, 05:22

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

@WJG6260 You don't need faster chips for 40 or 50 MHz. 15ns rated ones are more than enough. Just find the less flaky chips in the pile that will allow you tighter timings. I also noticed that on some motherboards POD100 works just fine at 3.3V. Maybe the mobo figures there is an overdrive chip …

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Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2022-10-29, 19:34

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

man, i hope this works as intended.

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Re: 3 (+3 more) retro battle stations

Posted on 2022-10-29, 19:08

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

@CoffeeOne Sorry to hear you didn't hit the jackpot. It is improbable to find non ADZ/ADW models capable of 180/200MHz on air cooling. So far i stumbled only one one BGC model that can do 180MHz on air - sort of kind of. Unfortunately Asus VLI does not offer 60MHz base frequency. Still, the chances …

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Re: Creating a voltage regulated 386 BL3 module from existing parts

Posted on 2022-10-29, 06:18

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@Feipoa The standard implementation for SIS 303 306 307 seems to be 8Mb RAM and 64Kb L2 cache. Your board is one-off thing. That's why Mr.BIOS is not handling it properly.

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Re: Creating a voltage regulated 386 BL3 module from existing parts

Posted on 2022-10-27, 06:35

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Good story. 1. Can this be a cache policy thing ? The DTK BIOS does not allow control over that. Cannot think right now of a tool that can do it so we can experiment. 2. Good info. 3. Same as 1 ? 4. This is strange. Will check tomorrow on my side. 5. I also had some issues with SIS Rabbit at 50MHz …

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Re: Techmedia resurrection - 486 build

Posted on 2022-10-27, 00:44

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

The two links: Re: 3 (+3 more) retro battle stations Re: 3 (+3 more) retro battle stations (there are 2-3 more pages after the post with chatter about M919 and its peculiarities)

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Re: Techmedia resurrection - 486 build

Posted on 2022-10-26, 05:20

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

So, here is your m919 build log. Good stuff. One thing to note - the stability issues listed in your last post sound unusual. At up to 160mhz you should be able to max-out all bios settings without any side effects. I can point you to two posts - one from me and another by @chadti99 talking about …

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Re: Creating a voltage regulated 386 BL3 module from existing parts

Posted on 2022-10-26, 05:07

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Dont know what is the lesser evil inthis case. The 3 cpus here are quiet different in OC capability. One of them cannot go past 80mhz, second one maxes around 90, third one can go up to 105-110. Feels like lacking QC at the fab for this silicon. Looks like your sxl2-66 running at 2x40 will be a …

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Re: 3 (+3 more) retro battle stations

Posted on 2022-10-26, 02:24

by

by pshipkov

in Marvin \ System Specs

in Marvin \ System Specs

@doogie What happened with Asus VLI ? I use the 9191016S BIOS for M919. Works well. Tried the rest. The Award one is not good. Cannot remember if there are notable differences with the later AMI one. If you mean to do the hot-flashing of the BIOS - that will work. --- @WJG6260 There were no …

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Re: Creating a voltage regulated 386 BL3 module from existing parts

Posted on 2022-10-25, 19:42

by

by pshipkov

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Too bad ALI Panda cannot handle well the BL3 CPU beyond the 25MHz. I like it when things out of a sudden decide to work. Good outcome with the SIS Rabbit motherboard. And the Doom number for 2x40 is not bad at all - 20 fps. It is getting into the playable zone. Can you remind me if you can run SXL2 …

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