Re: Weird motherboard behaviour after Dallas RTC replacement

Posted on Yesterday, 09:55

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The ASUS P/I-P55TP4-XE comes with the Dallas "DS12887A", if you replace it with the more familiar "DS1287" the CMOS settings are being reset at every boot resulting in a "CMOS corrupt" message every time.

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Re: Looking for an am386dx motherboard bios

Posted on 2021-11-28, 17:56

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thermalwrong, how did you manage to remove the sticker without the slightest damage?

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Re: 386 mainboard ID help needed

Posted on 2021-11-28, 08:59

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

They say Ni-MH batteries only leak if they operate "outside the specifications", i.e. when the charging circuitry is not designed correctly. And here might be the problem since the (very primitive) charging circuits on 386 / 486 mainboards were designed for Ni-Cd batteries. So I´ll keep an eye on …

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Re: 386 mainboard ID help needed

Posted on 2021-11-27, 15:02

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Meanwhile - for the "original touch" - I fit in a new VARTA Ni-MH battery. I hope it ages better than it´s predecessor. The restoration is now cpmplete. 386_33E_repair3.JPG I still hope anybody here knows this mainboard and has some details. All I was able to find with this "Eagle" chipset was an …

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386 mainboard ID help needed

Posted on 2021-11-25, 07:51

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I recently bought this nice 386 mainboard, because it uses the not so common ELITE "Eagle" chipset consisting of "e88C311" and "e88C312". 386_33E.JPG It also came with "MR BIOS" EPROMS and provides a maximum of 128KB L1 Cache A lot of damage had been done courtesy of the VARTA battery. I already …

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Re: Biostar mb-8433uud-a - no POST - long beeps

Posted on 2021-11-22, 09:18

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This mainboard seems to have been exposed to moisture for a long time. Look at the corrosion of the RAM retention-clips. I guess the contacts in the sockets look the same.

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Re: Abit BE6-II v1.0 conundrum

Posted on 2021-11-21, 17:44

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by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That´s an odd issue. According to the manual there are some restrictions for PCI-slot 3 and PCI-slot 5 which are sharing resources with the onboard IDE controller. PCI-slot 1 isn´t mentioned. I would start with a recap to rule out any inerferences of "polluted" voltages. These can cause all errors …

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Re: Need an ID on this triton motherboard

Posted on 2021-11-21, 10:20

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

All my PT-2003 are revision 1.3, some have the 30-pin VRM socket, some don´t. There are two different BIOS files available - one for boards with SMC Super-IO and one for the UMC Super-IO (ending with "803" or "804"). I guess the green PCBs were made by "Pine" 😉

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Re: Need an ID on this triton motherboard

Posted on 2021-11-21, 09:34

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by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have a couple PT-2003 boards but never seen one with a green PCB so far. It´s a fast and reliable FX mainboard

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Re: how tough is 286 processor

Posted on 2021-11-19, 17:44

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by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In some cases there´s a forced shorting of the core-voltage with ground when the chip is inserted the wrong way, so the PSU just won´t start up and no damage is done. I have no idea if that´s the case here.

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Re: Apple II Europlus ][

Posted on 2021-11-19, 17:40

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Congrats! I always enjoy repairing on component level (instead of swapping cards). You always expand your knowledge...

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Re: IBM 5151 Horizontal Linearity Adjustment

Posted on 2021-11-12, 12:38

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

These are perfect for this job, far better than a np-electrolytic.

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Re: Wacky experiments: running a K6-2 on Socket 5 without an interposer

Posted on 2021-11-10, 18:42

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by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Mainboards with a VRM-socket or prepared for a VRM-socket are always wired for dual voltage. Sometimes there are jumpers to be removed to enable split voltage operation, on some boards a trace on the backside has to be cut. What about (carefully) drilling a 1 mm hole in the socket for socket 7 CPUs …

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Re: Looking for specific variety of pentium motherboards

Posted on 2021-11-10, 07:28

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by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Asus "P4C800 Deluxe" was one of my favourite socket 478 boards.

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Re: AMD K6-2, K6-2+ and K6-iii+ RAM limitations on ALI Aladdin V (M1542) SS7 boards?

Posted on 2021-11-09, 15:28

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by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Intels 430 FX and TX chpsets are limited to a cacheable area of 64MB. 430 HX has a limit of 512MB In case of the ALI V northbridge it depends on the revision. Late revisions G and H (with fixed bugs) can cache up to 4GB, most early revisions are limited to 128 MB. VIA´s MVP3 chipset with 512K L2 …

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Re: New processors for old sockets.

Posted on 2021-11-09, 07:11

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by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Even if we were able to do that there would soon appear other bottlenecks limiting performance gains. The FSB or the speed of the PCI bus come to mind here. In other words you would have to replace chipsets next and rediseign mainboard layouts to really make the new CPUS have any significant effect …

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Re: Intel PRO/Wireless 2011 (WPCR2011WW)

Posted on 2021-11-08, 17:26

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by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here´s my latest driver for XP: Filename 2011_2011B_3.1.1.31.7z File size 1004.41 KiB Downloads 1 download and this might be the client-software: Filename 1x1363REL_NT.7z File size 2.4 MiB Downloads 1 download

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Re: Best (Super) Socket 7 motherboard?

Posted on 2021-11-06, 08:39

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The Freeway seems to have just 1MB L2 Cache and the older MVP3 southbridge that´s capable of ATA33 only. Not very convincing... If you really need 5 or 6 PCI slots it might be an option.

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Re: The legendary HX chipset

Posted on 2021-11-05, 14:35

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Today I did some further research and some tests with an Elitegroup "P5HX-B" (Rev. 1.1 with split voltage): P5HX-B_Cache_1.jpg There´s 256K L2 cache onboard plus a 32Kx8 TAG-RAM and there´s a COAST slot. I updated to BIOS 1.6h (the latest one that I know), jumpered everything carefully and inserted …

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Re: HP Netserver E800 motherboard flash with CUT-DLS ASUS bios

Posted on 2021-11-04, 21:18

by

by majestyk

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If this is not a productive system, just try it and keep the original BIOS at hand in case you run into troubles.

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