Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-05, 07:09

by

by sliderider

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've just found out something useful. When I ran those Win98 tests above, I was using 2 sticks of EDO RAM. Each stick was 32MB, total 64MB. I'm doing some more DOS testing now, and so I set the BIOS settings back to their original very aggressive settings. I noticed this caused a problem, which did …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-05, 09:32

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Have you tried running Memtest version 4 from a boot floppy and letting it finish the run? http://www.memtest86.com/ This case sounds similar to a case I had which was tough to troubleshoot. I ran this system with the fastest ram and cache settings; everything was set to fast and the system ran well …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-05, 09:48

by

by retro games 100

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'll try all of these interesting ideas when I next test the Biostar mobo. ATM, it's somewhere - not exactly sure where. I'm sorry but right ATM, I've got a box of untested stuff that I need to plough through...

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-05, 14:00

by

by sliderider

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Relative to Pentium, how fast is a 200mhz 486? About a Pentium 100? If that's as fast as it goes, wouldn't a Pentium Overdrive 83 have more overclock potential on this motherboard since it's almost to 100mhz to start with?

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-05, 16:42

by

by swaaye

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@swaaye I've always been intrigued by the MediaGX, but am afraid it would open a can of worms with my Cyrix 5x86 obsession. It could end up being a money pit of doom. :happyhappy: Oh I know how that goes. One thing leads to another and soon there are 10 packages on the way. Relative to Pentium, how …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-05, 17:10

by

by retro games 100

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@swaaye I've always been intrigued by the MediaGX, but am afraid it would open a can of worms with my Cyrix 5x86 obsession. It could end up being a money pit of doom. :happyhappy: Oh I know how that goes. One thing leads to another and soon there are 10 packages on the way. I can relate to that. 1 …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-05, 17:58

by

by sliderider

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So has anyone tested a Pentium OD with these boards? What clock speeds, FSB and multipliers are doable? I'm guessing even 2.5 x 40 or 3 x 33 is going to be pushing it.

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-05, 18:31

by

by retro games 100

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So has anyone tested a Pentium OD with these boards? What clock speeds, FSB and multipliers are doable? I'm guessing even 2.5 x 40 or 3 x 33 is going to be pushing it. You participated in this thread, here . In it, I mention that the POD works very well on this mobo. The POD overclocks to 100 MHz, …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-08, 12:12

by

by Tetrium

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@swaaye I've always been intrigued by the MediaGX, but am afraid it would open a can of worms with my Cyrix 5x86 obsession. It could end up being a money pit of doom. :happyhappy: Oh I know how that goes. One thing leads to another and soon there are 10 packages on the way. Relative to Pentium, how …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-12, 12:42

by

by udam_u

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Extra Cyrix 5x86-120's... If this wasn't my daily machine, I'd say yes, but alas I need the backup proc. for this system in case of failure. The exception to this would be if you wanted to trade a working Cyrix 5x86-133 for a 5x86-120. :) I understand your situation. Unfortunately I have only two …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-13, 02:43

by

by feipoa

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I really like such specialized information! However in my opinion these old CPU's are very tolerant - they should safely withstand 4V so this modification is not necessary as for me. That may be true in the short-term, but for such a rare processor, it is a much safer bet to pamper it. Plus it will …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-13, 22:29

by

by udam_u

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I really like such specialized information! However in my opinion these old CPU's are very tolerant - they should safely withstand 4V so this modification is not necessary as for me. That may be true in the short-term, but for such a rare processor, it is a much safer bet to pamper it. Plus it will …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-29, 12:58

by

by udam_u

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have just received Biostar MB-8433UUD-A VER:2! This motherboard is really small but looks very high-end. Finally I have 1:2/3 FSB to PCI divider! Also I'm very surprised because it has chipset supporting EDO memory: UM8881F 9552-ETS (bios is dated to 12/05/95). Here you are some screens: http:// …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-29, 13:18

by

by retro games 100

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Great! :happy: I'm really glad you've got this mobo. I am very interested in learning more about this mobo's BIOS options. I have added my current options to your BIOS set up screen photo. I am not sure if all of my options are correctly set up for "maximum/fastest performance". I would be very …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-29, 13:29

by

by retro games 100

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I am wondering something. What's this please? It looks like a small wire, on one of the SIMM slots. It's a zoomed image taken from your photo of the revision 2 mobo.

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-29, 14:19

by

by udam_u

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank You rg100! You are amazing! [: The small thing that you have found is a piece of grass! ^^ I cleaned a little bit this motherboard but I skipped this blade. I don't know what is the history of this motherboard but when I opened the package it looked like it was lying in the past few years in …

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-29, 15:40

by

by udam_u

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have one problem - I can't find JP17 jumper! [: Is it possible that this jumper is wired permanently?

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-29, 17:11

by

by retro games 100

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Wow, nice! 😀

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-29, 17:43

by

by udam_u

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have made quick test - my am5x86 even don't want to boot on this motherboard at 200MHz. rg100 how can I set 5V to CPU? I can't determine first pin on jp36, jp37 and jp39. I have no more time today but I will return to test tomorrow. (:

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Re: UMC chipset PCI 486 mobo. AMD P90 CPU options?

Posted on 2011-04-29, 17:56

by

by retro games 100

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here ya go! 😀 Please note that I am looking for a job working as a motherboard manual writer.

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