Re: Varta replacer

Posted on 2024-04-23, 21:47

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

There are three main concerns when doing a mod like this that never really get covered on YouTube. 1) making sure the RTC keeps accurate time after leaving the system off a day or two - low standby voltage can save the NVRAM settings just fine and still not run the RTC properly 2) making sure the …

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Re: AT Ppower Supply with lost caps

Posted on 2024-04-23, 21:44

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This viewpoint really irritates me. Like the last Tony359 video [Let's fix this 𝗗𝗘𝗔𝗗 ATX power supply!] https://www.youtube.com/watch?v=n86eU5rsJds with that stupid (paraphrasing here): 'I was happily using this supply up to the moment it died, but now that Its fixed I wont touch it anymore!!1'. …

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Re: Keyboard crashes on old 386 motherboard

Posted on 2024-04-23, 21:32

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm sorry, I missed this message. Silly question: do you have your post-card plugged the right way round? 😀 I made that mistake once! If so, well then you might have a bad one indeed. The continuous beep is weird. Have you got any further than your previous message?

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Re: Acer V58 diagnosis

Posted on 2024-02-28, 09:45

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Unfortunately I've inspected the board physically multiple times, it's in very good nic and I cannot find any damage. Hence why I started probing pins! :) My guts feeling say that it's the motherboard itself stopping the CPU. When I got it, the RESET line would not disable and turned out there is a …

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Re: Acer V58 diagnosis

Posted on 2024-02-27, 19:11

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Can I check which one is CPURST? I have a RESET on the pinout, AK20 - that goes high for a moment and then it goes low as expected.

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Re: Acer V58 diagnosis

Posted on 2024-02-27, 12:17

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've now probed things on the CPU end (at the back of the CPU) and I do not see any activity whatsoever. Nothing. There is clock, voltage and reset works. But the CPU does not start. I checked the HOLD, HLDA (Hold Acknowledge), STPCLCK pins, nothing points to something requesting the CPU to stop. …

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Re: Acer V58 diagnosis

Posted on 2024-02-26, 21:36

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This really helps, thank you! I guess the V58 won't be so different at least on the basics!

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Re: Acer V58 diagnosis

Posted on 2024-02-26, 19:12

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I found this document for the ALI chipset. So it seems the BIOS is not on the ISA bus which is weird as it goes onto the ISA bus via a LS245. Anyways, the BIOS communicates with the CPU via a bus which goes to the Southbridge which goes to the PCI bus which goes to the Northbridge which goes to the …

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Acer V58 diagnosis

Posted on 2024-02-26, 17:21

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi all, I am diagnosing an Acer V58 - https://theretroweb.com/motherboards/s/acer-v58#docs - the manual is like 95% accurate as I see something is not there. I took a look at this board in one of my videos, first box: https://www.youtube.com/watch?v=pEeNqD2FOHQ The board appears to be dead. The CPU …

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Re: Shuttle 591P (Apollo MVP3), Windows 98SE and 3D graphics

Posted on 2024-02-18, 16:47

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Interesting. I should check the voltages next time I play with that board. However, when I still had issues, moving everything to the "twin" board never solved any issues. But it could be that the CF was unreliable on both boards and "covering up" for other issues with RAM and CPU? I believe the …

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Re: Shuttle 591P (Apollo MVP3), Windows 98SE and 3D graphics

Posted on 2024-02-18, 15:52

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you very much, I don't know if the message was addressed to me No, it was addressed to the community but you are welcome! :) Yes, it was weird that the CPU died. Someone asked me if I overvolted it - if I did, it wasn't intentional. But that PC had been SO unreliable before then, it would …

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Re: Shuttle 591P (Apollo MVP3), Windows 98SE and 3D graphics

Posted on 2024-02-17, 13:35

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I painfully went through the 200+ video clips and 15+hours of footage and made a video of this upgrade/repair! 😀 I hope you like it! https://www.youtube.com/watch?v=0_k3xtvr3Kw

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Re: 486 motherboard. Raising from the dead.

Posted on 2024-02-04, 17:48

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That's a shiny motherboard 😀 Very glad it made it there safely and very happy to see it in good hands being properly used!

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Re: 486 motherboard. Raising from the dead.

Posted on 2024-01-27, 13:14

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you Sir - I don't think I did anything special, it's "easy" with the scope and the right tweezers! I was recommended those tweezers by another youtubers, Bits und Bolts - the link is in the description of the video. Yes, the listing looks bad (features: they don't explode!) but they seem good …

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Re: 486 motherboard. Raising from the dead.

Posted on 2024-01-26, 20:29

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I agree, those diodes are there for "just in case". Sphere will let us know 😀 Board should still be "in transit" 😀

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Re: 486 motherboard. Raising from the dead.

Posted on 2024-01-26, 20:06

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I thought about that just yesterday: what is the purpose of the diode? It prevents voltage coming from the rest of the board from reaching the battery I guess. In case someone plugs something on the external battery connector I guess? I mean, it's unlikely but probably a "good to have". If the …

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Re: 486 motherboard. Raising from the dead.

Posted on 2024-01-26, 17:35

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Video is live 😀 https://www.youtube.com/watch?v=yVg2pvyYbn0

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Re: W98-XP Best Forceware drivers

Posted on 2024-01-25, 20:38

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by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Indeed, @RandomStranger. With "unexpected" I meant "to me" 😀 Somehow I thought my 5200 would outperform the MX400 - but turns out it's doing what's supposed to be doing.

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Re: W98-XP Best Forceware drivers

Posted on 2024-01-25, 09:35

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Of course - it was unexpected to me, I thought the 5200 was better than the MX400, I wasn't aware of the various flavours available. Not a big deal, I purchased the FX5200 as I thought my MX400 was faulty - it's not so now I have basically two identically-performing cards 😀

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Re: W98-XP Best Forceware drivers

Posted on 2024-01-24, 17:40

by

by tony359

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It's a 64bit unfortunately, 166(333)MHz clock The MX400 runs FASTER on my P4, 3DMARK 4398 of the MX400 vs 4139 of the FX5200. Unexpected! 😀 The 5200 though supports more stuff than the MX400? What would you use on your P4?

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