Re: Hi! i have to know the power switch pinout of a AT power supply

Posted on 2020-10-27, 15:19

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Yes, you need a switch that is rated for AC mains voltages, and it has to be a latching button, meaning that it "stays pushed". The little switches in ATX case are not rated for mains voltage and are momentary, so they won't work here. Besides, the switch must have 4 terminals, and you must wire it …

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Re: 486 Dream Build, but turning into nightmare? Com Ports not working?

Posted on 2020-10-27, 07:19

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That motherboard has type B serial connectors, the Goldstar Prime 2C has type A. So using the same cable definitely won't work. But at least one combination should be working... Interesting. I'll dig around and see if yet another cable will work, like you said, it should be working.... Yes, I have …

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5.25 Floppy Drive - problems writing specific tracks

Posted on 2020-10-27, 06:42

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm having a strange problem with an old 5.25 floppy drive and would like some help troubleshooting, at this point I would be interested in finding the cause even if it's not easily fixable. The drive is an ALPS DFC642B01B (5.25 HD/1.2M) from around 1987, probably from some IBM PC of that era. It …

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Re: What game are you playing now?

Posted on 2020-10-26, 22:31

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by TheMobRules

in Milliways

in Milliways

Finished Call of Cthulhu, A waste of time, it's a walking simulator with laughable stealth and shooter sections, both are completely devoid of challenge. Have you played Call of Cthulhu: Dark Corners of the Earth from 2005? That game is kind of a guilty pleasure of mine, on one side it gets the …

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Re: Any compelling reason for Socket 5/7 build if I have SS7 boards?

Posted on 2020-10-18, 23:42

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I always thought that a socket 7 board with something like intel chipset would be more stable and has less problems than super socket 7 boards with MVP3 or ALI chipsets? Like if you are planning to use a cpu that would work with normal socket 7 and not planning to use AGP card, wouldn't a socket 7 …

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Re: 486 PSU questions

Posted on 2020-10-16, 00:15

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

An entire 486 PC probably doesn't need more than 50 - 60W (assuming a common configuration with 1 HDD, 1 or 2 FDDs and maybe a CD drive). So 150W should be plenty. Additionally, your PSU is branded Emacs, those are made by Zippy if I remember correctly. In that case, it should be a very good quality …

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Re: Bought these (retro) hardware today

Posted on 2020-10-14, 17:54

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As for the 4MHL3S motherboard, I dunno. It just doesn't start. I thought I got the jumpers right. I know the ISA video card works. Tried a bunch of different EDO ram. I just don't know. EDO won't work there, or in most 486 boards for that matter. Only some of the later boards (usually PCI) support …

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Re: Bought these (retro) hardware today

Posted on 2020-10-12, 16:33

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Got this Buslogic BT-440C/445C FLOPPY and SCSI VLB in the mail. Is supposed to be regarded as one of the highend SCSI VLB cards so I'm interested to see how it holds up against my Adaptec controllers. That card looks really nice, looking forward to see how it matches against Adaptec. One thing I …

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Re: DS1287 to 12887+ journey (and weird side-effects)

Posted on 2020-10-09, 18:52

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

As far as I know the DS1287 and DS12887 should be compatible. As for the differences with other RTCs of the same "family", such as DS12C887 or DS12887+: The 'C' means it has an extra "century" bit for Y2K support, but it will be ignored if the BIOS is not Y2K compatible The 'A' at the end means the …

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Re: PayPal takes your money

Posted on 2020-10-08, 21:18

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by TheMobRules

in Milliways

in Milliways

The problem with PayPal is that they do everything they can to obfuscate things and make their rules difficult to understand, so you never know the details of extra charges and stuff like that. Add to that their commonly known scummy practices of currency conversion (which is set to allow PP to …

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Re: Compaq AT power supply difference.

Posted on 2020-10-06, 18:16

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Basically I am trying to figure out if it could be modded to be replacement for standard AT power supply. I don't have any specific motherboard I would use it with at the moment, but basically with standard AT motherboards. Why don't you turn it on with an HDD and maybe some fans plugged to the …

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Re: 486 and SVGA, almost bearable performance but not quite

Posted on 2020-10-06, 17:58

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Since you have an S3 card, have you tried S3VBE20? It may give you a video performance boost in VESA modes.

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Re: Newly made Gravis Ultrasound compatible cards ... what's the degree of interest?

Posted on 2020-10-06, 16:33

by

by TheMobRules

in Marvin \ Sound

in Marvin \ Sound

Congrats on the new job shock__!! Nov-30 sounds good to me for starting the prod run, I don't know about the others but my RC1 ARGUS has been performing as expected, no problems at all! By the way, I got your brackets today @Whiskey, they look fantastic, thanks for your effort with this! Tonight …

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Re: 8-bit guy gets ultra-rare NOS IBM (prototype?) from Computer Reset then proceeds to obliterate it

Posted on 2020-10-02, 05:44

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by TheMobRules

in Milliways

in Milliways

I wrote a lengthy post on his Patreon explaining what might have caused his continuity probe to appear "dead short" (though if you look closely, the meter says 15 ohms), he mentions this in the follow-up video. tl;dr My educated guess is it's either the primary of a transformer, or the degaussing …

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Re: I made a miniature IBM PC

Posted on 2020-10-01, 19:20

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Superb work!

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Re: 8-bit guy gets ultra-rare NOS IBM (prototype?) from Computer Reset then proceeds to obliterate it

Posted on 2020-10-01, 18:17

by

by TheMobRules

in Milliways

in Milliways

idk... sounds pretty unapologetic... and not really going into the actually valid criticisms much, more just trying to fend off all the unnecessary personal attacks that unfortunately happened. Yeah, I don't think he really cares about learning from his technical errors in the video, as you say …

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Re: S3 Vision 968 VLB replica

Posted on 2020-09-30, 18:36

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by TheMobRules

in Marvin \ Video

in Marvin \ Video

Nice! Looking forward to how the Virge project turns out! It may be just an impression, but my Trio64 VLB seems to have better display quality than my #9 Vision968 PCI... my 968 has the IBM DAC though, maybe the TI DAC is better?

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Re: Ontrack disk manager overwrites drive

Posted on 2020-09-30, 18:27

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by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ontrack needs to modify the MBR and write some of its data to the drive so it can get loaded to memory at boot time, that's why you're supposed to format the drive AFTER Ontrack is active and is doing the translation to access the full capacity of the disk. I assume you're trying to install Windows …

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Re: PC-Chips M912 Rev. 1.7 (real Cache) + PODP5V83 - L1 Writeback disabled?

Posted on 2020-09-30, 04:19

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

EDIT2: Looks like the AWARD BIOS has issues sizing the L2 cache - it gets detected as 256k even when 1MB is installed during POST, CTCM and Speedsys detect the correct 1MB tho. Might be a display issue or something being severely broken. Going back to AMI just in case. Maybe that AWARD BIOS has …

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Re: Soldering struggle

Posted on 2020-09-30, 04:13

by

by TheMobRules

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is there corrosion on the solder points you're trying to melt? If they look dark or dull try yo scrape it until it looks shiny, and also apply flux to help the solder to flow. You may also try to add fresh solder while heating up the joint as well. If all you're going to do are simple tasks like …

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