Re: Mystery 486 Motherboard

Posted on 2018-06-08, 17:21

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

The motherboard itself does not have an EISA BIOS on it either. AMI used a gold sticker on EISA boards and clearly stated it was a EISA BIOS on boot and the BIOS label. Also, EISA boards usually do not have a single EISA slot. All the slots would accept EISA cards with the exception of HiNT Ceaser …

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Re: Voodo 2 SLI vs. Voodoo 3

Posted on 2018-06-08, 17:10

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In my Slot 1 PC, I have a GeForce 2 GTS for DirectX/OpenGL stuff while the V2 SLI handles the Glide stuff. Not really necessary, but it allows for a card with better performance than the V3 while still being able to do Glide natively.

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Re: D5CUB PS/2 pinout

Posted on 2018-06-07, 04:42

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have that board, though currently it's not in use and I don't have the pinout either. However, by doing some continuity testing with a multimeter I found out that: x 0 x x x +5V GND ? ? So the only thing left would be to determine which of the last two pins is Data and which is Clock.

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Re: ZEOS 486 motherboard tag chip(s)

Posted on 2018-05-25, 07:53

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Very useful info, thanks! It looks like 2 32K x 8 is the way to go for the tag sockets then! I may take a while to source the chips but I will definitely report back once I have them installed. Thanks again.

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ZEOS 486 motherboard tag chip(s)

Posted on 2018-05-25, 01:34

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hi guys recently I got a ZEOS Python/Pantera 486 PCI motherboard with Intel chipset. I ran some basic tests and it appears to be working fine, I just need to hack the Dallas RTC in order to get the BIOS to store settings and keep time. However, the board came without cache so I was thinking about …

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Re: (Apparently) Dead Socket 370 and 7 PCChips mobos

Posted on 2018-05-21, 14:13

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I have experienced the same with a couple of Slot 1 PCChips boards, one is my old M747 and the other is an M715 I found in a discarded case. Replacing capacitors and reflashing the BIOS with an external programmer didn't help. It seems that this sudden death syndrome is quite common on PCChips …

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Re: My journey to a bearable Sound Blaster 16 model

Posted on 2018-05-19, 04:35

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by TheMobRules

in Marvin \ Sound

in Marvin \ Sound

In regards to "noise blaster".. I need to do some more testing, but it seems to me like a lot of it has to do with a noisy ISA bus. I recently fired up a 386sx-25 based system I got that came with a Sound Blaster 2.0 in it. The motherboard has not a single electrolytic capacitor on it. I am …

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Re: A tale of two PSUs

Posted on 2018-05-18, 17:25

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Other things I can improve outside replacing the old Fan and the old caps? You could improve the input filter by scavenging safety approved X and Y caps from other units and if you manage to fit larger heatsinks it may help with heat as those look quite thin. Other than that, it should have no …

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Re: Are Sun Microsystems Ultra series computers good for Win9x gaming?

Posted on 2018-05-11, 08:47

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I also used those in college for most courses that involved programming in C (operating systems, networking), and also a bit of Sparc assembly when studying RISC architectures. I have to say, I was quite relieved when they migrated the whole lab to Linux PCs around 2002, the old Sun workstations …

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Re: ATX2AT Smart Converter: Need Your Advice!

Posted on 2018-05-09, 19:38

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I also think it's awesome! One thing that may or may not be important, but I have seen that some of those passive ATX2AT adapters have a dummy load for the ATX 3.3V line since 3.3V is not used in AT units and the unbalanced load could cause problems with some PSUs. Now, I don't know if that is …

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Re: Looking for opinions on old psu

Posted on 2018-05-08, 20:38

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Judging only by the size of heatsinks and transformers, I'd say you'll be lucky if that thing does even half the ratings on the label. From the other options you mention, the PCP&C Silencer 750 could be a good option assuming it's in good condition.

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Re: Is Tualatin a +12v or +5v CPU?

Posted on 2018-04-26, 21:17

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

In theory v1.3 was last of the 5v heavy. I think it was the last one to actually require it. In practice some of the earlier v2.x were pretty heavy on 5v. I just looked at a v2.0 with 32a-3.3v 32a-5v 18a-12v(x 2 rails) . HardwareSecrets had good reviews too. (Not sure if they still do that but the …

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Re: Hardware you wish you'd never bought.

Posted on 2018-04-19, 15:01

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by TheMobRules

in Milliways

in Milliways

Every inkjet printer - Who needs color. Who needs the aggravation. Laser all the way. It burns through expensive ink, won't accept third party ink, and won't even let you continue to print with black if one of the other colours is low. Such a scam. Yeah, printers have to be some of the most …

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Re: Identifiying burnt transistor on a Intel SE440BX-2 board

Posted on 2018-04-15, 01:37

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I just checked my board, and it's really hard to make out the markings. My phone camera was unable to get anything readable. By looking very closely at it, it seems to be PC6 . I can try a bit harder if no one else is able to provide more info. Note: I edited my original post since I had been …

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Re: Wheres The Negative For Battery On 386 Motherboard

Posted on 2018-04-09, 20:23

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You really don't want more than 3 cells in series. That is not always the case, I have a few 386/486 boards that require 6V in order to keep the time, and it does say so in the manual. 4.5V is not enough in those cases. I suppose it depends on the voltage drop caused by the diodes in series between …

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Re: Roland MT-32 power supply.

Posted on 2018-04-02, 17:12

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by TheMobRules

in Marvin \ Sound

in Marvin \ Sound

If I'm not mistaken both the PSB-120 and PSB-230 accept an input range of 100-240V AC despite their name (at the very least the PSB-120 does), the only difference being the plug type. And yes, they're compatible with the MT-32.

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Re: ZIDA 4DPS CACHE PROBLEM

Posted on 2018-03-22, 18:36

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

OK guys here is a full set of photos, from bios, bootscreen and speedsys if anyone got any advice i appreciate, this cache not being detected is strange to me I don't think you mentioned anything about it, but what speed are your cache chips? 15ns? 20ns? Anyway, you can try the following: Double …

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Re: ZIDA 4DPS CACHE PROBLEM

Posted on 2018-03-21, 18:47

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What are the values you are using for DRAM and cache timings in the BIOS? I have a PCChips M921 board that doesn't detect L2 cache when using the default slow cache timings that are set by the BIOS Chipset auto configuration. I need to manually set it to a faster value such as 2-1-1 or else it is …

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Re: Question on Replacing a Dallas Real Time Clock

Posted on 2018-03-12, 00:34

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, they are the same. The “+” just indicates that it’s the lead-free version of the component.

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Re: AT power supply advice

Posted on 2018-02-24, 08:32

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yeah, since it's a well known brand like Rubycon it should be pretty easy to find the datasheets. With that info you can shop for replacements, ideally you could buy Rubycons of the same or equivalent series for each existing cap, but since that's generally not possible here's the parameters I use …

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