Re: Retro OSes for retro computers

Posted on 2022-04-03, 16:42

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by gdjacobs

in Marvin \ Software

in Marvin \ Software

appiah4 wrote on 2022-04-01, 07:00: I really didn't want to get into this argument but I see it the way @gdjacobs does.. If you stretch it so far you may as well say Windows 11 is basically based on OS/2. Or DOS.

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Re: Retro OSes for retro computers

Posted on 2022-04-01, 00:29

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by gdjacobs

in Marvin \ Software

in Marvin \ Software

being forked from something is literally being based on it Nah, not necessarily. A little depends on meaning. BSD originally borrowed code from AT&T UNIX, but any vestigial relationship is long gone subsequent to the 1994 settlement between USL and BSDI. You can't really say it's AT&T UNIX based …

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Re: Intel 440BX Slot 1 on wheels

Posted on 2022-03-22, 02:07

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by gdjacobs

in Marvin \ System Specs

in Marvin \ System Specs

Finally I came across a good deal for an old server case. Was it too big? Maybe.... But it had swinging doors, two 3.5" external drive bays, eight 5.25" external drive bays, lots of non-blue LEDs, an important looking lock mechanism and *wheels*! Nice case! I have a dual Coppermine BX system that …

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Re: P3B-F stopped working...need help

Posted on 2022-03-03, 01:11

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I probably wouldn't use a via as they're usually not as robust for soldering on. I think the two pin jumper pad by the corner mounting hole would work. 24 ga wire looks to be about right. If so, you can run a jumper wire along the board edge and tape it down.

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Re: P3B-F stopped working...need help

Posted on 2022-03-01, 21:20

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Wow! Sorry for the newbie question, now, but what would be the best way to fix this particular problem? Best would be tracing what is being powered by that diode and running thicker wire between two points directly. Yes. Use the diode through hole on the right side of the picture as a solder point. …

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Re: P3B-F stopped working...need help

Posted on 2022-03-01, 00:41

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Spooky...

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Re: P3B-F stopped working...need help

Posted on 2022-02-28, 18:02

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Shorted transistor would conduct 5V straight to Vcore or Vcore to ground. There are also other scenarios but those are the two what would possibly generate short. I would do similar short check and measure resistance between [Vcore output <-> GND] and [Vcore output <-> 5V input]. Similar for caps. …

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Re: 5IVXB Motherboard Difficulty flashing Bios

Posted on 2022-02-27, 04:50

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Why do not flash the new bios from the mainboard using uniflash? You wouldn't have any issue with 12 volt in that case. That would be a great option if the board could be made to boot which, AFAIU, is not currently possible due to the partially corrupted flash chip . Hot flashing in another board …

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Re: P3B-F stopped working...need help

Posted on 2022-02-27, 04:47

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

yep psu not starting at all is due to protection, and hot resistor might suggest a short on one of the rails. This is not due to bad electrolytic caps, they dont die shorted. Ceramic and tantalum caps can fail short. It can also happen with semiconductors. Try probing around with power off and a …

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Re: Celron MMX 366 MHz or Pentium 2 MMX 400MHz

Posted on 2022-02-27, 04:22

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

They are the same chip with some configuration and feature differences Celeron fsb is 33 mhz slower The celeron core is 33mhz slower The celeron has less cache Others are correct, there shouldn’t be anything that the celeron is faster at. Interesting side note. I recently found a article where …

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Re: Roland MT-32 , Do I need one ?

Posted on 2022-02-04, 17:47

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

CrossBow777 wrote on 2022-02-04, 15:42: I think there might be other synths/modules/devices that are basically MT-32 at their heart that can be used as well. But just something else to consider. His friends call him Munt.

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Re: Roland MT-32 , Do I need one ?

Posted on 2022-02-03, 19:12

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

Those are really good prices! MIDI boards never show up where I live. I bought a MOTU board a couple of years ago, although I can't remember how much I paid. I've had issues with the emulation it uses not being 100% compatible with all titles or all host systems (not sure which), but it's the only …

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Re: Pentium MMX build for late DOS/Win95 games.

Posted on 2021-12-15, 18:16

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by gdjacobs

in Marvin \ System Specs

in Marvin \ System Specs

The ESS Audiodrive chip is the 1869F. Certainly seems like a nice option, even if I am planning on using the sound card. The ESS11869 is lovely. I definitely prefer ESFM synthesis rather than the CQM modulation you'll get from the AWE64. I also noticed quite a few of the SIS 5598 drivers are …

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Re: PSU for Socket A - Athlon XP 3000+

Posted on 2021-12-02, 02:11

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

30A on 5V isn't an outrageous target. It isn't, but stating that you need 30A as a bare minimum for such setup is not correct. You may want higher output on 5v rail if you use a lot of hard drives in your retro system. Especially if it's something like WD Raptor or SCSI. These doom canisters …

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Re: Dual socket 7 build

Posted on 2021-12-01, 04:02

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by gdjacobs

in Marvin \ System Specs

in Marvin \ System Specs

3COM and Netgear were the nics to have for Windows 9x... For XP, Intel should be fine as older Realtek were sometimes kinda wonky. Make sure you have a NIC that does hardware offloading. Intel and 3com were the best options for fast ethernet, although DEC Tulip and Tulip clones (Lite-on PNIC and …

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Re: PSU for Socket A - Athlon XP 3000+

Posted on 2021-11-25, 22:56

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by gdjacobs

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You want at least 30A there for high-end AthlonXP CPUs. That's a common myth. You don't need that much current. Modern PSU with 25A should more that enough. The XP 3200+ Barton does require a lot of current given the maximum TDP of about 75W or 80W (depending on FSB clock). Given conversion losses …

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Re: Ultimate multi-sound card setup?

Posted on 2021-10-09, 06:00

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

BloodyCactus wrote on 2021-09-13, 12:41: I have a 104 + 105, they are not the same internally. the 104 is even passive, no power required, the 105 requires power. i mothballed both of mine to use a Roland A-880 instead. The 105 is likely buffering each output so the current draw on the source …

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Re: Does the Yahama YMF 719 (not 718-s) have real OPL3?

Posted on 2021-09-16, 04:26

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

All of the YMF71x chips have OPL3 inside them, regardless of the OPL logo that is seen on some of the chips. (there are OPL3 chips with and without the logo for example, it is purely aesthetic thing) It's a 48khz implementation, just like the YMF289. Extensive testing on the forum hasn't revealed …

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Re: mp3

Posted on 2021-09-16, 04:22

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

Yes, with MPXPLAY . You'll need a least a fast 486 as minimum for playing high bitrate MP3 files. Quite a few options. https://pmwiki.xaver.me/drdoswiki/index.php?n=Main.Mediaplayers#toc4 I suspect the most efficient player will be something fairly cut down such as DOSAMP. I've heard of reduced …

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Re: HardMPU, anyone?

Posted on 2021-09-16, 04:04

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by gdjacobs

in Marvin \ Sound

in Marvin \ Sound

Are these HardMPU-boards cheaper than the PCMIDI from keropi? I ask because I need one or two for my PCs and I only have one PCMIDI and cannot afford another one at the moment :) Keropi's project is sweet, but these boards have no hidden special sauce burned into the GAL chips. This means you can …

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