Re: Pentium 1 system doesn't POST, replaced RTC

Posted on 2021-05-16, 15:53

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Black in the middle: Thanks. Where does the cable labeled as "Turbo Switch" go? The schematics for my motherboard (https://th99.bl4ckb0x.de/m/C-D/33825.htm) mention only a "Turbo LED" connector, no "Turbo Switch". EDIT Yeah, and your board probably doesn't have a turbo header. It was common at the …

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Re: Pentium 1 system doesn't POST, replaced RTC

Posted on 2021-05-16, 14:33

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I forgot to take note how these 2 6-pin ATX cables were connected. Which cable goes on the top connector? And which one on the other? EDIT. According to what I read during some research, the black wires should be in the center. Is that correct?

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Re: Pentium 1 system doesn't POST, replaced RTC

Posted on 2021-05-16, 13:10

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I put the motherboard back inside the case. I'm about to connect the FP Header cables the way they used to be on the board. There is one cable (Turbo Switch, the blue/black/white cable) which I don't know which pins it should be connected to.

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Re: Pentium 1 system doesn't POST, replaced RTC

Posted on 2021-05-16, 10:05

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The RTC you've put looks faked to me. If you rub a Q-tip with some alcohol on it I'm sure you'll start to see the q-tip turn dark and the writings will disappear. Dallas DS1287A.jpg: The RTC I bought in 2016. I took the picture after rubbing the top of the chip with some tissue paper with some …

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Re: Pentium 1 system doesn't POST, replaced RTC

Posted on 2021-05-15, 23:01

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I don't think so, I think you can get a new one from mouser. I just visited their website. The range of variety in brand names and model numbers is enormous. I looked around, but I can't find the RTC (Benchmarq bq3287AMT) that used to be on the board nor the one (Dallas DS1287A) I bought in 2016. …

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Re: Pentium 1 system doesn't POST, replaced RTC

Posted on 2021-05-15, 21:53

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Deksor wrote on 2021-05-15, 20:59: The RTC you've put looks faked to me. If the RTC does turn out faked, is there a possibility that it killed the motherboard?

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Re: Pentium 1 system doesn't POST, replaced RTC

Posted on 2021-05-15, 21:23

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Deksor wrote on 2021-05-15, 20:59: The RTC you've put looks faked to me. Where could I get a good RTC?

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Re: Pentium 1 system doesn't POST, replaced RTC

Posted on 2021-05-15, 21:20

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The RTC you've put looks faked to me. If you rub a Q-tip with some alcohol on it I'm sure you'll start to see the q-tip turn dark and the writings will disappear. Would you like to take a good photo for our database here please ? http://www.win3x.org/uh19/motherboard/show/1223 (the one on the other …

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Re: Pentium 1 system doesn't POST, replaced RTC

Posted on 2021-05-15, 21:04

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

also, if you still have the old RTC, you might consider modding it... and fixing the bent/broken pins... ymmv. I'm in Belgium too. I still have the original RTC: it's a Benchmarq bq3287AMT. Some of its pins are slightly bent and I might have even broken off one or two pins in 2016. No idea, too …

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Pentium 1 system doesn't POST, replaced RTC

Posted on 2021-05-15, 20:38

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This topic is a sort of follow-up to one I published on this forum in 2016. It can be found on the following link: www.vogons.org/viewtopic.php?f=46&t=46745. I picked up a P1 system at someone's place in 2016 and wanted to restore it. The motherboard was identified (see the topic I linked to) as a …

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Re: Identify this motherboard+system, and help with resetting CMOS (RTC battery dead, not posting)

Posted on 2016-02-14, 11:30

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

While 2000 might be more stable, it is also a much worse platform to run anything you'd wanna run on a P100. It is specially bad at running DOS games which were the norm when the P100 was a relevant processor. NT4 it's a better match, but for gaming it is even worse at DOS than Windows 2000 I don't …

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Re: Identify this motherboard+system, and help with resetting CMOS (RTC battery dead, not posting)

Posted on 2016-02-14, 02:12

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Trying to run Windows 2000 with a Pentium 100 and 32? MB memory must be a pain. :D Windows 98 SE is a much better choice, Windows 2000 really needs 128MB memory to run well. After I took out those two RAM chips, the system had 64MB memory left. Initially, it was 72MB, I believe. I know the …

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Re: Identify this motherboard+system, and help with resetting CMOS (RTC battery dead, not posting)

Posted on 2016-02-14, 01:25

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Eventually, I got the motherboard to detect the hard drive. I started the installation of Windows 2000, but a bluescreen error came up when it was near the end. Same error immediately after I rebooted the system to let it continue the installation. So I thought the RAM might be bad, and I took out …

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Re: Identify this motherboard+system, and help with resetting CMOS (RTC battery dead, not posting)

Posted on 2016-02-13, 15:25

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I did the test bench setup and the system booted! I turned it back off, and took out the hard drive. Two of the pins on the back of the drive were bent. No wonder the board would not detect the drive. I bent them upright again, and installed the drive. After I powered on the system, it did 'see' the …

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Re: Identify this motherboard+system, and help with resetting CMOS (RTC battery dead, not posting)

Posted on 2016-02-13, 14:09

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I think I may have found it. https://th99.bl4ckb0x.de/m/C-D/33825.htm So, can you confirm that my board is the one in the link? On that page it says 'Reset Switch' next to jumper JP15 ('reset' as in 'Reset the BIOS', right?). In the first picture in my last post, jumper JP15 is to the bottom right …

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Re: Identify this motherboard+system, and help with resetting CMOS (RTC battery dead, not posting)

Posted on 2016-02-13, 11:53

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here is the rest of the pictures.

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Re: Identify this motherboard+system, and help with resetting CMOS (RTC battery dead, not posting)

Posted on 2016-02-13, 11:51

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks so far guys! Apparently, my digital camera is not as good as I thought. I made new pictures with my mobile phone, but this time every photo is just one segment of the motherboard. I guess that means the obscured writing is 5IEM M101. Indeed. And the writing below the jumper is apparently for …

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Re: Identify this motherboard+system, and help with resetting CMOS (RTC battery dead, not posting)

Posted on 2016-02-12, 21:09

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What do you think of these photos? I took these with my mobile phone. I do have a good digital camera around, but the batteries are dead at the moment. If you need a better photo, I can take one tomorrow.

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Re: Identify this motherboard+system, and help with resetting CMOS (RTC battery dead, not posting)

Posted on 2016-02-11, 19:22

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK, thanks guys! I'll do what you --Malvineous and brostenen-- suggest. It's going to take me a bit to take everything out of the case. I expect to have time on Saturday. When I have a good picture I'll post it here together with any findings and results.

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Re: Identify this motherboard+system, and help with resetting CMOS (RTC battery dead, not posting)

Posted on 2016-02-10, 12:06

by

by Odiseo

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

worst case scenario you can remove it once more and short the ~RCL pin to the ground pin with a wire. It would, though I'm not sure it will make your board POST again. There is a picture in the lower left corner of the first page of the document you linked that shows where the pins are. It might be …

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