Re: Win98SE Build

Posted on 2021-09-24, 12:56

by

by TehGuy

in Marvin \ System Specs

in Marvin \ System Specs

Honestly, you could probably get away with a modern ATX PSU with a 20-pin adapter if needed. this user's running on some OEM/SI PSU with ~15-16A 5v rail , another further in the thread is working with a bit less, and another yet doing a dual P3-S system on a modern ATX PSU. The Win98/DOS slot 1 in …

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Re: Config.sys & Autoexec.bat for the nth time I imagine

Posted on 2021-09-24, 01:31

by

by TehGuy

in Marvin \ Software

in Marvin \ Software

On a DOS configuration with a menu one can group multiple lines to avoid repetition. For example on CONFIG.SYS: [MENU] menuitem=WINDOWS, Microsoft Windows 98 Second Edition menuitem=DOS1, MS-DOS 7.10 - Expanded Memory menuitem=DOS2, MS-DOS 7.10 - Extended memory menuitem=DOS3, MS-DOS 7.10 - …

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Mitsumi D509V2 - DOS Area: Drive Not Ready ever

Posted on 2021-09-22, 12:07

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Been screwing around with a 5.25" FDD I got a bit ago and seemingly no matter what jumper settings or physical order on the cable I cannot get this drive to even try to read anything. It does that seek test thing during/after POST just fine but when I go to try to read something it doesn't even …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-21, 00:14

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Alrighty; After much waiting and then fumbling I got one whole cap out after wiggling it out of some molten solder. This one is one of the 330uF ones: measures ~340uF and starts at ~ 0.65MΩ and rises ~+0.03MΩ every second or two. From what I can gather, short of finding a way to juice it a bit to …

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Re: Using SST39SF020A in place of SST29EE020 for BIOS EEPROM?

Posted on 2021-09-14, 14:32

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The only thing I can find that seems to really differ is how the IC performs the writes (byte-program v page-write), product ID, and some timings with how long it takes the IC to perform an operation; otherwise the OP mode selection sequences, software command sequences, etc. seem to be 1:1 But …

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Using SST39SF020A in place of SST29EE020 for BIOS EEPROM?

Posted on 2021-09-14, 12:54

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

So I've got 2 GA-6BXCs, a Rev 1.7 and 2.0. The 1.7 came with the 29EE020 for its BIOS IC and the 2.0 came with nothing. Both are 2mbit (256K x 8 ) ICs and as far as I can tell from their datasheets the pin layout is the same and both run at 5v. Would there be anything beyond that I would need to …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-13, 18:19

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by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Whelp, I'll be back in a week when my new 'workbench setup' comes in and I blow something up or light it on fire

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-12, 13:21

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by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You don't need to invest in something expensive and professional, even a Chinese Yaxum 878 (I have one) is good enough. It has a soldering iron and hot air blower, which work up to 480 degrees and have ESD protection. I don't know how much it costs in other countries, but I believe it costs less …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-12, 00:32

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Capacitors should ALWAYS be measured off the board, measuring them on the board makes no sense as they are connected to each other, think of them as batteries, interconnected with other batteries, if one battery is discharged it will accumulate charge from the others to equalize . sounds like my …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-11, 23:38

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by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Actually, thinking on it now, it should've come off as strange that after power is removed hitting the power button doesn't turn it on for that brief second before power is drained from the board (also multimeter in relative mode pops up as OL and I doubt 1200uF is out of range for it)... I guess …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-11, 23:07

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Multimeter finally arrived! Probing for continuity shows that, despite that one pin and the surrounding looking really sketch, it actually passes signals just fine (unless my meter beeping at me is bad, but the manual says it'll do that if the result is under 30 ohms) to that pin, and any of the …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-11, 15:40

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I’ve been washing motherboards, video cards, sound cards, etc for 20+ years. And not just washing them in the sink - nooooo, I give them a nice 10 minute high pressure shower in the bathtub, using a multifunctional Grohe shower head. After that I take my time with the hair dryer, making sure that …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-11, 14:27

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Remove the cmos battery, wait a few hours, then wash the motherboard thoroughly using mild detergent and a toothbrush or brush, let it dry well for about 3 days, I've saved many boards this way, and don't worry, wash it's totally safe as long as it doesn't have energy and it dries well. when you …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-10, 22:11

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by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Fixing it is probably going to be cheaper and more fun anyways, considering the 6bxc rev 2.0s left on ebay are going for waay too much for just the board alone. I did manage to find another person with a slot 1 gigabyte board that apparently mostly uses the same caps as my board so I've got a …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-10, 20:51

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The RESET stayed kinda half lit like that while in the PCI slot, yes. Only the +12v light is on when the card is in the top ISA slot and I mean the only thing (no LED display, etc). I do not have an ESR and Amazon just dinged me to say my multimeter wont be here until Saturday/Sunday :/ Photos are …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-10, 19:43

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by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Still waiting on the multimeter to test continuity with, but here's the rather disappointing readout on the diagnostic card I got The lights are, from left to right -12v -- CLK +12v -- IRDY +5v -- FRAME +3.3v -- RESET LED display shows nothing but dashes also I think I might've had it plugged in the …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-09, 22:56

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Went looking at the back for anything shifty as the front looked fine; seems like something at some point spilled on the board but it wipes away with a bit of work and some iso alcohol. Except for one pin on the top PCI slot that looks a bit suspect as it looks like something ate into the PCB a bit …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-09, 16:59

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'd follow advice and set the jumpers correctly for your board avoiding auto detect (if it's your case), no underclock either. Once you turn on the board let it stay on for a couple of minutes, than reset or turn off many times and see if it makes any difference. In my short and noob-like …

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Re: GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-09, 12:00

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have put an order in for a diagnostic board that should get here tomorrow and, just in case, a multimeter should that end up being necessary. What if you tried the lowest amount of ram of the correct type speed and clock? You may want to look at manuals for your motherboard to determine this. Also …

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GA-6BXC Rev 2.0: No POST, No Beeps, What Do

Posted on 2021-09-09, 00:04

by

by TehGuy

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I've looked over the caps and, as far as my untrained eye can tell, none of them have popped. Nothing looks leaky, nothing looks burnt, nothing smells funny. I've tried 3 different CPUs: some Via C3 866AMHz in a MS6905, a P2 300MHz (both with and without the switches set correctly), some Celeron ( …

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