Re: How to check if onboard devices are VL-Bus integrated?

Posted on 2017-04-15, 16:39

by

by SSTV2

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If chipset supports VLB then you can be pretty much sure that video adapter is sitting on it, would make no sense if it were otherwise, and as far as i know 86C805 used only VLB interface.

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Re: How to check if onboard devices are VL-Bus integrated?

Posted on 2017-04-15, 15:59

by

by SSTV2

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Measuring clock signal with an oscilloscope 🤣

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Re: Video Card Repair Suggestions

Posted on 2017-04-15, 15:53

by

by SSTV2

in Marvin \ Video

in Marvin \ Video

Use only sharp syringe needle to straighten out pins, I'm surprised that it even got detected by PC, if it didn't short something while it was powered on in that condition, card should work fine after repair. It also looks like few pads were ripped off PCB? In that case, with same sharp syringe …

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Re: HDD can read from, but not write to platters

Posted on 2017-04-15, 15:34

by

by SSTV2

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This reminds me an old IDE IBM HDD that is only 40MB big. When I got it, it had many many bad sectors. I tried to low-level format it which worked. Then I used FDISK to create partitions and then I tried to format it ... But the problem is that it goes up to 100% and then it says it can't end the …

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HDD can read from, but not write to platters

Posted on 2017-04-15, 14:08

by

by SSTV2

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm currently dealing with this issue on Conner CP30200 SCSI HDD. At first power on, HDD was detected by OS and i could browse and copy files from it (though i didn't try to write anything to it in order to not corrupt deleted files). After some use, it generated lots of bad sectors and caused …

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Re: Issues with my super socket 7 Motherboard beeps DFI K6xv3+/66

Posted on 2017-04-06, 01:58

by

by SSTV2

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Toss that amp out. First thing you need to do is figure out why exactly you get a weak signal from speaker header. There should already be some sort of driver/buffer on the motherboard for speaker as square wave generating timers output is too weak to drive it. Try to trace speaker header signal pin …

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Re: How does a Pentium III processor die?

Posted on 2017-03-20, 20:08

by

by SSTV2

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In my 30 years of handling computers and hardware I never witnessed anything die from ESD ever. To me it might as well be a myth.. You must be a poor conductor then :lol: Personally, i've killed 2 CPUs with ESD, one got killed while i was fiddling with a socket 7 system (just took CPU out, …

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Re: Does anyone have this ECS board or BIOS?

Posted on 2017-03-19, 22:58

by

by SSTV2

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

what to look for: https://web.archive.org/web/20001216230600/ht … nload/p5sja.htm where to download from: http://www.elhvb.com/mobokive/Archive/Ecs%20- … bios/index.html

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Re: How does a Pentium III processor die?

Posted on 2017-03-19, 22:43

by

by SSTV2

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm surprised that nobody mentioned a common cause of failing electronics, which uses semiconductors - ESD.

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Re: Recap question

Posted on 2017-03-05, 00:21

by

by SSTV2

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sometimes manufacturers decide to mess up with you, white paint should indicate negative polarity, but in your case it's reversed, if you happen to be confused about right polarities, check continuity between ground and cap pins to be absolutely sure, also square copper pad should always indicate a …

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Re: Geforce2 Ultra repair

Posted on 2017-03-04, 23:49

by

by SSTV2

in Marvin \ Video

in Marvin \ Video

The "thing" that fell off was an inductor (L), which was a part of LC filter circuit for red color signal , the pin that broke off in DB15 connector was used for a green signal line, so you were left only with blue color. Lucky you that the last color signal was intact, else you would get blank …

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Re: need help identifying motherboard!

Posted on 2017-02-28, 01:53

by

by SSTV2

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

With the mobo name it's an insta-find http://th99.classic-computing.de/src/m/S-T/33837.htm, socket model would've saved an additional minute 😀

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Re: WD90C11 VGA BIOS needed

Posted on 2017-02-06, 18:38

by

by SSTV2

in Marvin \ Video

in Marvin \ Video

Got it http://th99.classic-computing.de/src/m/C-D/30926.htm

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Re: WD90C11 VGA BIOS needed

Posted on 2017-02-02, 14:21

by

by SSTV2

in Marvin \ Video

in Marvin \ Video

You can't just slap some random 386 BIOS image into OEM motherboard and expect it to work, how do you know that it's 64k system and 64k VGA BIOS? Maybe it's 64k system and 32k VGA bios compressed down to 80k and the rest of the space reserved for BIOS update/diagnostics/unpack utils? First thing you …

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Re: Repairing defective Voodoo2

Posted on 2017-01-31, 18:54

by

by SSTV2

in Marvin \ Video

in Marvin \ Video

Does anybody know how would a Voodoo2 behave if at least 1 DRAM would be completely dead/removed in a BANK0 of TMU[0]? Source code of glide2x.dll has EDO DRAM data and address lines configurations defined for each TREX initialization. I'm beginning to think that in my case Voodoo keeps hanging when …

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Re: Bad DRAM on a voodoo 2 what should I do?

Posted on 2017-01-31, 01:38

by

by SSTV2

in Marvin \ Video

in Marvin \ Video

I'm dealing with exact same problem now myself, there are no high performance EDO dram sold individually, just bunch of 35-70ns ones.

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Re: Bad DRAM on a voodoo 2 what should I do?

Posted on 2017-01-30, 19:06

by

by SSTV2

in Marvin \ Video

in Marvin \ Video

TheCoach wrote: (top and bottom) Oh, you might probably meant front and back ICs, my bad.

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Re: Bad DRAM on a voodoo 2 what should I do?

Posted on 2017-01-30, 18:51

by

by SSTV2

in Marvin \ Video

in Marvin \ Video

OK so given that it's probably those two chips (top and bottom) that are faulty Top and bottom? Both DRAMs are at bottom, unless your IC marking on pcb is different, my Helios 3D V2 uses same component layout as yours Magic 3D, so i guess U24 is right behind U12, right? the question is do I need to …

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Re: Bad DRAM on a voodoo 2 what should I do?

Posted on 2017-01-30, 16:47

by

by SSTV2

in Marvin \ Video

in Marvin \ Video

Remember that limiting texture memory in software does not disable BANK1 memory, it's still being accessed.

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Re: The dying Quantum Bigfoot

Posted on 2017-01-30, 03:08

by

by SSTV2

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The restless spirits of mentioned Pakistani family have returned and are demagnetizing your bigfoots disks surface, Booo...! Jokes aside, i have similar problem with one of mine SCSI Conner CP30200, the longer it runs the more bad sectors it generates, something is causing it to demagnetize, opened …

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