Re: Soyo 486 motherboard installing socket for RTC

Posted on 2016-09-14, 16:41

by

by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, I think that hot air gun should only be used for recycling slots and big components from not-working hardware. Excessive heat can cause deformation and bending of the PCB, so the internal layers can be broken making the mainboard unusable... Once I tried removing ISA slots from broken …

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Miniature SS7 K6-2 + Voodoo Banshee PC

Posted on 2016-09-14, 12:50

by

by adalbert

in Marvin \ System Specs

in Marvin \ System Specs

I recently managed to build a miniature AT-style case for 4DPS socket 3 mainboard, but I decided to upgrade it and put something more powerful there, so I created a Super Socket 7 system :) Here it is compared to a 24 inch monitor and a speaker. IMG_1499.jpg Here are some topics about building the …

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Re: Simmconn AWE64 Adapter

Posted on 2016-09-03, 10:18

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by adalbert

in Marvin \ Sound

in Marvin \ Sound

Except as far as I'm aware the plans for it were never made public.. I may be wrong. http://simmconn.tripod.com/download.htm Here are all the schematics and files necessary for manufacturing so everyone can just etch the board in home or order a single piece from a local PCB manufacturer. I will …

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Re: Simmconn AWE64 Adapter

Posted on 2016-09-03, 07:27

by

by adalbert

in Marvin \ Sound

in Marvin \ Sound

I am going to make one piece of that adapter using home-etched PCB, just like I did with the Adlib card. I am able to buy 32mb simms locally for under 5 USD so I will just solder them directly to the PCB, with help of a pin header, so they will look like SIPP memory :p I will probably change the …

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Re: Silencing a Quadro FX 3000G / GeForceFX 5900

Posted on 2016-09-02, 22:30

by

by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If it's not getting too hot you might try soldering one 1w resistor of value around 40 ohms or two regular resistors in parallel around 80 ohms each in series to the cable of the fan. That's not really the best method of regulating the fan speed because it limits the current and not the voltage, but …

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Re: Think I ruined a great 486 motherboard.

Posted on 2016-09-02, 22:07

by

by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Did you try cleaning the slot and memory modules with alcohol? Also check if any of those little metal contacts is not bent or broken. Can you hear any beeps from the mainboard or is it completely silent? The worst option would be having the chipset killed by ESD because of frequent touching the …

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Re: Orinoco wifi card works in Win9x, but not in DOS

Posted on 2016-09-02, 21:57

by

by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

When card services are used, these parameters should be removed: /i=10 /b=1300 /m=d000 I managed to get that card working on a 486 and Pentium laptop, after long struggle I prepared files which enable Internet access both under DOS and Win 3.1 (that involves lsl.com file and some novell drivers if I …

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Re: I have an idea... Oh boy.

Posted on 2016-08-31, 09:52

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by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

do you share your files with us, so we can make copy's of your Card ? :) i also made a ISA Card: its a SolidState Disk Drive. I just used the files from Sergey's project, mentioned earlier in this topic - http://www.malinov.com/Home/sergeys-projects/isa-opl2-card , so they are already available ;) …

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Re: I have an idea... Oh boy.

Posted on 2016-08-30, 21:03

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by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for the detailed information, now I understand more about how it works. I also found some schematics, claimed to be LPT to ISA converters, which contain some glue logic chips, but I don't know if they will be any good for adlib. Here is one webpage https://translate.googleusercontent.com/ …

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Re: I have an idea... Oh boy.

Posted on 2016-08-30, 20:18

by

by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I found that project, controlling AdLib with parallel port: http://www.raphnet.net/electronique/adlib/adlib_en.php I have already seen that mentioned on this forum, but i will post it here anyway. This project is meant to be used for playing tracker music by computers without ISA slot, but I wonder …

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Re: I have an idea... Oh boy.

Posted on 2016-08-29, 21:18

by

by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Nope, the same stuff happens when I select Adlib in setup menu or run it with adlib command. At least on 1.3 version.

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Re: I have an idea... Oh boy.

Posted on 2016-08-29, 20:16

by

by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

All right, so it was the PC :) Turbo button didn't help, but I disabled the cache and now it sounds perfect. https://drive.google.com/file/d/0B2rbHIj6SMlFbmd4dzRhSnNTQ28/view?usp=sharing I guess that this card isn't a perfect choice for this computer, but maybe I will install it to a 386, for …

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Re: socket 3 heatsinks

Posted on 2016-08-29, 19:25

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by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Not sure how heavy heatsinks could be used with that, but I designed and 3d printed clips for mounting the heatsink directly to the CPU (black ones). These must be printed with ABS, not PLA. But earlier I made a prototype (white clips), just by cutting it from HIPS polystyrene sheet. Maybe you would …

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Re: I have an idea... Oh boy.

Posted on 2016-08-29, 18:50

by

by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I finally assembled it, and it works, well, kind of ;) Here is a sample of Lemmings music, which sound perfectly fine to me, the signal is clean and nice. https://drive.google.com/file/d/0B2rbHIj6SMlFUklZYU9nTktDMDg/view?usp=sharing I checked a few games and they work okay, but there is a problem …

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Re: Socket 7 heat sink + fan (thermal paste?)

Posted on 2016-08-28, 07:04

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by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Some older heatsinks had silicone pad glued to them, like this: https://www.amazon.com/400mm-205mm-Silicone-Thermal-Heatsink/dp/B007PPEW52 it is good for CPUs that don''t use too much power, it improves heat conductivity and you don't have to clean the CPU when changing it. I have even seen some old …

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Re: DIY retro PC case projects

Posted on 2016-08-27, 22:59

by

by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

All right, so my micro AT case is almost complete :) just need to 3d print the turbo button, add the stickers with names of buttons and improve some connectors in the behind of case. minipc_1.jpg minipc_2_scale.jpg I made a LED MHz display using a Atmel ATTiny13 microcontroller so it's programmable …

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Re: "Intel Inside" logo, 486 question

Posted on 2016-08-27, 13:38

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by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, that's nice :) I also have some spares (that is DX4/100 with passive screen, and DX2/50 + another DX4/75, with broken screens; i bought a bulk of them, of course screens are interchangable) and of course none of the floppy drives were working, that's standard for Citizen W1D drives. I fixed …

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Re: "Intel Inside" logo, 486 question

Posted on 2016-08-27, 01:11

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by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I checked my Siemens Nixdorf laptops, 486 version (DX4/75) has red Intel Inside sticker, Pentium 90 version has black Pentium sticker.

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Re: Gigabyte 586TX3 - PS/2 Mouse Header

Posted on 2016-08-23, 20:57

by

by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You can always just try finding ground and +5V lines, using a multimeter or by visual inspection, then just try switching around clock and data pins.

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Re: How to repair a toshiba laptop floppy drive ?

Posted on 2016-08-16, 19:26

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by adalbert

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Does anyone think that my drive is malfunctioning because I'm using a rubber band and therefore the speed is not constant or too low? That might be an issue, I also tried rubber band at first and I was getting similar symptoms (i was able to boot into DOS and turn on cable transfer program after …

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