Re: Need some help on a motherboard.

Posted on 2020-02-21, 06:56

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Robin4 wrote on 2020-02-21, 03:06: Does your motherboard support the Pentium 133 Mhz processor or higher? Like 150 Mhz max maybe. I don't know, mine came with a Pentium-100 installed and I've tried the board with some K5 but it didn't POST so I was very disappointed and put the board in storage.

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Re: Need some help on a motherboard.

Posted on 2020-02-21, 00:00

by

by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

On my P54SP4 the flash chip is a CAT28F010. Set the chip type as any 28F010 and then use the "Read ID" function, there are sites where you can identify the chip based on that ID (or post it here, maybe we can help).

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Re: Super Socket 7 Win98SE masochism (work in progress)

Posted on 2020-02-16, 21:33

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would try with another harddisk just to rule this out. Also, how are the capacitors on the motherboard?

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Re: AT-Mainboard: Matsonic MS6260S BIOS with Patch possible?

Posted on 2020-02-16, 21:21

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you very much Gona, it seems I will use this board one day 😀

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Re: What's the current status on decoding read-protected registered PAL chips?

Posted on 2020-02-13, 20:55

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

A while ago I needed to clone a PAL16L8. There is a simple adapter that you can use to read the PAL as a 27C020. Although I have a compatible programmer (TL866CS), this method didn't work for me, producing different results each time I read the chip. There is also this post by Chuck(G) on vcfed.org, …

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Re: Troubleshooting Asus PCI/I-P54SP4 no boot

Posted on 2020-02-09, 22:39

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Does your POST card have a "Reset" led? Does it turn off shortly after you apply power? Do you have means to measure the clocks on the board (ISA, PCI, CPU, KBC)? - edit: typed that while you were typing :) Try powering up your board while applying some pressure with your thumb to each big chip, if …

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Re: Computer freezes when accessing hard drive

Posted on 2020-02-05, 22:10

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks, I've learned a lot from your replies. I'm not a Linux user, but seems that I will have to delve into this as well. Is there a distro that can run from a LiveCD and help me with the above mentioned commands? Unfortunately today I had no time at all to further test the drive (or the computer), …

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Re: About removing and replacing barrel batteries..

Posted on 2020-02-05, 10:18

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The 5 volts you measure across that header are most likely because of the reverse leakage of the diode that should prevent the external battery being charged. Connect your multimeter in series with the battery pack and measure the charging current. If it is around 2-4mA your batteries are getting …

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Re: About removing and replacing barrel batteries..

Posted on 2020-02-05, 08:37

by

by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Not at all, if the holder is connected where the barrel battery was. But NiCd and NiMH have high self-discharge rate, so if the system doesn't see at least weekly use I'd say you'll find it often losing cmos settings.

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Re: Computer freezes when accessing hard drive

Posted on 2020-02-04, 21:50

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The drive is jumpered as master, will try other settings (even CS which I've never used). I'm always keeping the Secondary IDE free for testing devices, so no other stuff on that cable. Latest BIOS (F5) is installed. Currently I'm torturing the drive via the IDE-USB bridge, nothing seems out of …

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Computer freezes when accessing hard drive

Posted on 2020-02-04, 20:48

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi, folks. I got this Quantum Fireball EX 5.1GB few days ago and can't get it to behave. Due to space constraints I only have one retroPC available at all times, built around an Athlon XP 2600+ on a GA-7N400S motherboard; I like to call it 'the workhorse' as it's the one that I'm using to test ( …

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Re: Help identifying a 286 motherboard

Posted on 2020-01-28, 18:20

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here's a couple of AMI BIOSes for the TACT823xx chipset. Hope you can get your board working, mine is still dead (but haven't given up yet). Filename Unknown TACT 286.rar File size 90.62 KiB Downloads 3 downloads (Original high/low = what was on my board. Other two, from chukaev.ru54.com - they …

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Sapphire Radeon HD4650AGP - help needed

Posted on 2020-01-25, 22:01

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hiya folks! Got this from today's flea market, but after cleaning it I've noticed it's missing more than the usual SMD capacitors, so I don't dare power it up. So, if somebody has a similar card, please let me know the markings/values of Q842 transistor and R846 resistor. Many thanks!

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Re: any use for broken hard drives?

Posted on 2020-01-25, 20:53

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well... https://youtu.be/Oym7B7YidKs?t=60

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Re: Counterfeit 287 FPUs on Ebay

Posted on 2020-01-18, 14:35

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've bought a 80287-10 from this seller almost 2 years ago. Plopped it in a 286 motherboard and the system configuration table reported "Numeric Processor: Present", didn't do more testing at the time. I guess I'll have to do it these days :) How did you expose the relabeling? Some solvent or just …

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Re: Trying to identify 486 Motherboard and tinkering with it

Posted on 2020-01-12, 23:24

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

LM350 and LM338 were suggested on this forum as cheaper alternatives to the LT1085. They are drop-in replacements. For any of these, just check out if the board is wired to accept them (the Adj pin should connect to a resistive divider between Out and GND). The cap on the output is mandatory, but …

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Re: Trying to identify 486 Motherboard and tinkering with it

Posted on 2020-01-11, 23:13

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Award BIOS for this board can be found here. LT1085 is frequently used as a VRM on Socket 3 boards, but you'll have to study the board and see if it matches. A safer bet would be to search the net for a picture of the same board with the VRM fitted and try to read out the part number.

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Re: Trying to identify 486 Motherboard and tinkering with it

Posted on 2020-01-11, 20:36

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hope I'm not mistaken, but after a very quick search your board seems to be an Abit AH4T, for which the manual and settings are available (here). Your board lacks the VRM (empty spot for a 3-pin device under the CPU socket), so now it can accept 5V CPUs only.

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Re: Need BIOS file for any 386 motherboard with TACT83000 chipset

Posted on 2020-01-10, 22:11

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have tried the BIOS file that QuickNick sent me but it wouldn't post at all. Nothing. Bummer. That's unexpected. I've just checked my board moments ago, it's the same main chip as on yours, what differs is the cache controller. Austek on mine, i385 (I think) on yours. Nice boards...can you please …

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Re: Need BIOS file for any 386 motherboard with TACT83000 chipset

Posted on 2020-01-09, 12:28

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by quicknick

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here's the BIOS from my only TACT8300 board. A text string inside reads: Quadtel TACT83000/A38202/P29 386 BIOS Version 3.05.05 Copyright 1987-1990 Quadtel Corp. All Rights Reserved.

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