Re: External battery packs for 486 motherboard

Posted on 2024-04-07, 01:55

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Those external battery connectors in old boards use the two outer pins, 1 and 4. Usually 1 is connected to the battery + and 4 to -, but you should check because it's not always the case. The pin that is connected to ground will be the battery -. What you can do if your pack has a different …

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Re: ATX PSUs with a single AT power connector?

Posted on 2024-04-02, 08:50

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here's an example of a P4 motherboard I have with the AUX connector: Filename PlatiniX_4X.jpg File size 603.06 KiB Views 292 views File comment QDI PlatiniX 4X It's definitely the standard ATX one, not the proprietary Dell connector.

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Re: Any barebones 486-class motherboards?

Posted on 2024-03-30, 02:22

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd say most of the pre-PCI 486 boards that are not intended for OEM systems would satisfy that condition. The only integrated I/O "feature" would be the keyboard connector and you need to add in graphics/sound cards as well as multi I/O controllers for serial, parallel ports and drives. Later …

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Re: AT (Clone) - Motherboard Formfactor

Posted on 2024-03-29, 03:13

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

NSSI tells me that this is a Trident SVGA 2MB (TGUI9680-1). So with respect to the comment above - Realtek avoid - but Trident seems to be ok. Keep in mind that Trident chip is like 4 years newer than the Realtek one. Older Tridents were also slow, maybe not as much as Realtek but still slow. What …

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Re: ISA Cards & Devices Requiring -5V

Posted on 2024-03-28, 08:03

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I just got a YMF719 which seems to have the 5th pin and I am not sure if it requires -5V for proper operation. Please see the images below. Could someone please let me know if this requires -5V? If so I may have to return this card as I don't have an AT PSU. No, that card does not require -5V. The …

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Re: Iomega ZIP 750 internal drive colors availability

Posted on 2024-03-27, 21:17

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I actually have a ZIP750 that is not black, it's grey-ish/beige so these did exist. I bought it in 2006-07 but I don't remember ever using it... I can post a picture later if you want.

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Re: What game are you playing now?

Posted on 2024-03-24, 06:45

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by TheMobRules

in Milliways

in Milliways

Alone in the Dark (2024) The original Alone in the Dark from 1992 is one of my most beloved games of all time, and one of the main reasons why survival horror is my favorite genre. While the two sequels kept the gameplay of the original, the horror/lovecraftian elements were abandoned with the …

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Re: 486 SocketBlaster building experiment - Oh my God, a difficult beast to build

Posted on 2024-03-19, 01:31

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

- Check the DC-DC converter before soldering in to the socket. Use an 2 ohm/10W resistor to simulate the load and measure the ripple with the scope. Check the thermal condition of the converter. Please note the converter will be in a much hotter place next to the bottom of the CPU. Use high …

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Re: How to repair metal case screw holes

Posted on 2024-03-17, 02:00

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In situations like that I have used needle nose pliers to crimp the screw hole protrusion closed from the inside of the case. That avoids using non standard screws, and holds up well (or at least until the next time it is overtorqued). Hey, just did this and it seems to work great! Thanks for the …

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Re: How to repair metal case screw holes

Posted on 2024-03-16, 23:31

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would also like to know because I have the exact same problem with one of my cases!

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Re: 2024 - End of the era of Retro Computing Youtube channels?

Posted on 2024-03-16, 22:26

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by TheMobRules

in Milliways

in Milliways

Watched a minute, the ai generation is 'ok' as far as ai goes, but it just feels lifeless, like a power point presentation. When you watch it something just feels off, cheap and sloppy. All of these AI-generated videos/trailers feel the same, with each shot where everything pretty much stands still …

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Re: Any modern psu's that have large 5v rails

Posted on 2024-03-15, 15:53

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The reason I asked about combining +12V1 & +12V2, was because in the case of @Minutemanqvs' LC6560GP3 v2.3 PSUs 80+ Silver PSU (which specifies 2 split 12V rails on the label) ; the 12V is kinda low. And that may be because on one of the +12V rails, only the GPU connector harness might be …

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Re: "Local VGA Connector" on AIR 486E0 EISA mainboard

Posted on 2024-03-11, 18:40

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Found something, there is an ad about that motherboard on Sep-1992 BYTE magazine: https://archive.org/details/eu_BYTE-1992-09_OCR/page/n213/mode/2up The local bus VGA card is called "A VIEW-2L" (there is also an "A VIEW-1L" mentioned below) and from the label on the BIOS chips it seems to be made by …

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Re: "Local VGA Connector" on AIR 486E0 EISA mainboard

Posted on 2024-03-11, 16:19

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Love these EISA 486 boards with custom local bus slots! It's strange that being an OPTi-based board it doesn't feature the OPTi local bus (which looks just an EISA slot). So, we can at least tell what it ISN'T: OPTi/Orchid local bus Gigabyte local bus (two 16-bit ISA slots) ECS local bus (same …

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Re: Full recap of Chieftec CFT-650-14C PSU - I need some info about its electrolytic capacitors

Posted on 2024-03-11, 07:42

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you for these details. In this case I will not do any experiments with polymer caps. The new Samxon low ESR caps I can get are also from not so good GF series, what about Samwha instead? I'll replace Junk-Fu with some descent brand all purpose/regular caps (those are with smaller capacity 1 …

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Re: Full recap of Chieftec CFT-650-14C PSU - I need some info about its electrolytic capacitors

Posted on 2024-03-11, 06:14

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Teapo SC and Samxon GF are low ESR, you can replace those with Nichicon UPW series or equivalent. Samxon RL and Jun Fu HS are general purpose (note the max. ripple being specified at 120Hz instead of 100KHz in the datasheets), so anything 105C rated should work there. Do try and get some decent …

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Re: Asus P/I-P55TP4 Rev. 1.21 boot error - no screen, beep code only

Posted on 2024-03-08, 04:28

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In my experience ASUS boards of this era that use Dallas RTC exhibit a really strange behavior when the battery is almost depleted, sometimes not POSTing at all. As soon as I desolder it and do the CR2032 mod they usually start working properly. Also, not long ago I got a P55TP4XE which had a couple …

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Re: 80386 BIOS image collection

Posted on 2024-03-02, 21:17

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

#: 124 Manufacturer/Identifier: DFI 386-33EC Chipset: ETEQ ET82C491/2A "COUGAR" BIOS/Version: AMI 386 BIOS PLUS 05/05/91 BIOS ID: 30-0400-ZZ1211-00101111-050591-ET/386H Filename 386-33EC.jpg File size 939 KiB Views 254 views File comment 386-33EC

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Re: 12V rail shorted on ISA card - damaged motherboard. Fixable...?

Posted on 2024-03-01, 19:30

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Moreover, it should go out as a warning to anyone using modern ATX PSUs with a single 12V rail capable of more than 18 Amps that such motherboard trace damage becomes much more likely to occur when a short-circuit happens. For this reason, I prefer to use older PSUs with more reasonable output …

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Re: Bought these (retro) hardware today

Posted on 2024-03-01, 07:00

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ubiq wrote on 2024-03-01, 04:23: ASUS ISA-486SV2 (rev 3.10) OMG is that MR BIOS the one that came with the board? If so, please dump the contents! As far as I know no one has been able to find MR BIOS for 486 SiS chipsets!! EDIT: look like someone else has the same board and dumped the BIOS already …

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