Re: What retro activity did you get up to today?

Posted on 2024-05-18, 07:16

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Repaired a couple of traces on a mobo and soldered a tiny qfn. Wow, nicely done that looks really really tiny! What does it do? Traces were connected to IDE pins, IIRC "something" enable (I'll post later with exact definition). DA0 and DA2 (pins 35 and 36) It was slow and boring, but there was …

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Re: What retro activity did you get up to today?

Posted on 2024-05-17, 23:49

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Repaired a couple of traces on a mobo and soldered a tiny qfn.

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Re: Do you keep a tech-journal?

Posted on 2024-05-16, 01:28

by

by Nexxen

in Milliways

in Milliways

Your answers are very interesting. I have to rethink a few things. That raises another question, namely, are you trying to document what you are doing for yourself, or are you trying to make the information available to others? Some who have already given answers are obviously trying to track things …

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Re: Do you keep a tech-journal?

Posted on 2024-05-15, 18:11

by

by Nexxen

in Milliways

in Milliways

After a non short while on the internet, the most used method so far is spreadsheets. I don't think that it is the best. Plain Word-like programs are on par or second by not much, ease of use is probably the cause while spreadsheets are good for lists.

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Re: Do you keep a tech-journal?

Posted on 2024-05-15, 12:27

by

by Nexxen

in Milliways

in Milliways

Since you're taking notes by hand first, it might be worth looking at an OCR solution like a Rocketbook: https://getrocketbook.com/ . I have one and the OCR is decent. I never ended up using it much, as I find it more convenient just to type out my notes. To expand on the markdown stuff I mentioned …

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Do you keep a tech-journal?

Posted on 2024-05-14, 22:16

by

by Nexxen

in Milliways

in Milliways

Hello!! I have a separate sheet for every tech stuff I do, based on the object, task or whatever it is. E.g. [mobo/gfx/peripheral model] or [OS]... submenus (links, ver, what's to do, BIOS......) If I need to go look for something I have notes, first on paper, then in digital. I was thinking about …

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Re: Bought these (retro) hardware today

Posted on 2024-05-14, 21:11

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

iMac G5 2.1GHz , 20" screen -- PSU died when the seller turned it on to show me it worked. Purchase canceled. The original box was damaged, holding with tape. It was advertised as brand new... guess it served him well.

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Re: GA-586HX REV1.56 PS/2 header and troubleshooting

Posted on 2024-05-11, 16:11

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sucho wrote on 2024-05-11, 15:33: Good news everyone! Both USB ports seem to work, tested with mouse and flash drive. All good in the end. I'm happy it turned out to be just a learning experience. If you want you can watch some more video by Necroware to learn even more stuff that will come handy …

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Re: GA-586HX REV1.56 PS/2 header and troubleshooting

Posted on 2024-05-11, 11:42

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Wired up the USB header and it would not show up in Windows 98SE. So I checked the BIOS and it is disabled there. So I enabled it, still nothing. Checked BIOS again and seems my settings are NOT being saved at all, except for real time clock. Immediately thought bios eeprom is worn out (which would …

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Re: M912 with 1 MB cache

Posted on 2024-05-10, 10:07

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I wonder if a "res network" (long big black ones) is missing or something. L2 cache goes through it for a fact. 1MB was overkill and unlikely to be populated, they could have not soldered the required network. Comparing yours with ver 1.7 could be a last step.

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Re: GA-586HX REV1.56 PS/2 header low voltage on CLK pin

Posted on 2024-05-09, 18:58

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sucho wrote on 2024-05-09, 18:05: So there's that. Thanks everybody for chipping in! No, go break something else and let us figure it out 😀 This is great news!! Have fun with it.

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Re: GA-586HX REV1.56 PS/2 header low voltage on CLK pin

Posted on 2024-05-08, 23:33

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I fried a ferrite with a short and died a burning death. Check any component on the CLK and test for shorts, res too high etc.

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Re: Bought these (retro) hardware today

Posted on 2024-05-07, 19:53

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

-

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Re: Broken socket 7 board - Epox P55-TF. Stuck in post

Posted on 2024-05-07, 17:32

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

...voltage to the tab of either Q2 or Q3 results in the 3.57v output of the transistor (same measured on both or 2.49 volts for the vcc2 transistor with mmx settings). 2.49V for the MMX (P55) setting is way too low. This should be 2.8 - 2.9V. There´s definitely something wrong in the VRM circuit. …

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Re: Bought these (retro) hardware today

Posted on 2024-05-07, 13:11

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Waiting to go pick up a 2005 G4 Powerbook. PSU + laptop (HDD + DVD), but no DDR ram. I have a bountyful amount of that 😀 Screen has some horizontal lines dead.

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Re: Broken socket 7 board - Epox P55-TF. Stuck in post

Posted on 2024-05-03, 23:32

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

https://www.youtube.com/watch?v=3Sfahr9JElw

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Re: AMD 5x86 Question

Posted on 2024-05-02, 11:32

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

https://theretroweb.com/motherboards/s/edom-w … tech-mv035#bios Check BIOS and upgrade if necessary. Being there only one file I hope it helps.

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Re: Broken socket 7 board - Epox P55-TF. Stuck in post

Posted on 2024-04-29, 18:46

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

...3.45 is fine but 2.33 is low and that could prevent it from working. It wouldn't be a first if the Vcore mosfet failed. I see "B-C-E" printed on the transistors, so we´re safe to say these are bipolar transistors (BJT) rather than MOSFETs. Of course the still can be faulty. I make a wholesale …

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Re: Broken socket 7 board - Epox P55-TF. Stuck in post

Posted on 2024-04-29, 12:45

by

by Nexxen

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The 5v rail seems steady, but low. I am still getting 4.45 consistent on my multimeter, but the scope shows closer to 4. If you suspect capacitors, I can do some recapping. However, don't electrolytics most often fail open? None are leaky or bulging as far as I can tell. There are 3 tantalums and …

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Re: Dual Pentium Pro - Intel PR440FX Build

Posted on 2024-04-28, 15:01

by

by Nexxen

in Marvin \ System Specs

in Marvin \ System Specs

LOVE

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