Re: Does anyone own a MISTer FPGA and how is it?

Posted on 2022-01-21, 08:09

by

by vstrakh

in Console & Arcade Emulation

in Console & Arcade Emulation

the mister has less latency is because there is no OS getting in the way, as all the software runs on it bare metal. In theory you could could run software emulators bare metal on a raspberry pi or an x86 pc and they would be just as good. The fpga vs sw is not about os vs bare metal. The cores in …

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Re: Weird text character showing up in Pentium 1?

Posted on 2022-01-18, 20:19

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I had similar issues with ISA video card not making good contact in the slot. Reseating the card or moving it to other slot usually fixed this.

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Re: Does anyone else have any issues with the "MIDI IN 1" socket on their SC-55mkII?

Posted on 2022-01-18, 08:29

by

by vstrakh

in Marvin \ Sound

in Marvin \ Sound

Kahenraz wrote on 2022-01-17, 23:35: It's completely off-pitch! Does it react to "key shift" controls with the front panel buttons?

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Re: CD-in Audio - where to find for my SB Pro clone

Posted on 2022-01-15, 15:23

by

by vstrakh

in Marvin \ Sound

in Marvin \ Sound

Looking at the website, for example Mitsumi, there are these wires on the 4-Pin side: - right channel signal - right channel return - left channel signal - left channel return No ground? The ground is the return path in unbalanced interfaces. Since your drive doesn't have the balanced output, …

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Re: CD Emulator

Posted on 2022-01-13, 17:50

by

by vstrakh

in DOS

in DOS

There was no subst with cd emulation, It was cdemu after subst.

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Re: Games with Adlib as an option for sound effects

Posted on 2022-01-13, 08:13

by

by vstrakh

in DOS

in DOS

The Flashback can use the Adlib for SFX. I remember I did hack it to make it play sounds using Covox clone instead of Adlib that I didn't have at the time.

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Re: Help for jumper of 486 motherboard

Posted on 2021-12-27, 13:32

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ah, ok. I've assumed that was the current state on the photos.

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Re: Help for jumper of 486 motherboard

Posted on 2021-12-27, 13:01

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Is there a jumper shorting out the JP8, which is supposed to be a LED output?

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Re: Adding 3.3v to pci

Posted on 2021-12-27, 08:19

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

What’s the most powerful one I could use? Any chance you could send link? Perhaps sketch the schematic I need to make for the power circuit? What about a high amp diode stack between 5v and. 3.3v pins? Diode would heat up and eventually fail. Hopefully fail open, not short, but that might depend on …

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Re: Help identifying game by sound track

Posted on 2021-12-26, 21:29

by

by vstrakh

in Milliways

in Milliways

Legend Entertainment's adaptation of "Death Gate." Yes, this is it! Somehow my memories about this game are vague. I was suspecting the other game from Legend Entertainment - Shannara, which I remember vividly. But skimming through videos on youtube I couldn't confirm this. But yeah, it is "Death …

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Help identifying game by sound track [found: "Death Gate" by Legend Entertainment]

Posted on 2021-12-26, 20:02

by

by vstrakh

in Milliways

in Milliways

Digging through my old sources for midi player for OPL3 I wrote long ago, I found some test tracks that I definitely extracted from some game. I've always been ripping valuable resources worth collecting. Now I can't remember the game, and no Shazam would help :) Can you recognize the game by these …

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Re: Adding 3.3v to pci

Posted on 2021-12-26, 10:28

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sphere478 wrote on 2021-12-26, 09:38: https://www.adafruit.com/product/2165 🤔? Yeah. This might be enough for some less power-hungry cards (audio/network?), but definitely won't do for video cards. Switching regulator capable of many amps would be preferable for a "more generic" mod.

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Re: Adding 3.3v to pci

Posted on 2021-12-26, 06:48

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

How do I make a 3.3v regulator? I need like a mosfet and a capacitor yes? Depends on the needs. You may be ok with some fixed voltage 1117 LDO regulator to make 3.3v from 5v. Some caps are needed for sure, LDO might start oscillating without it. The datasheet for the exact regulator you choose will …

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Re: Adding 3.3v to pci

Posted on 2021-12-25, 17:41

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Added bonus from that large ground plane - improved signal integrity in the lines directly under it.

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Re: Can't get power LED working

Posted on 2021-12-23, 20:21

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Are you sure that's power led? Typically molex connectors were used with decorative illumination. In a way you can call that a "power led" too :) You do plug them in free molex connector from PSU, or in series with some other peripherals (fan/hdd/etc). If it doesn't glow when plugged in free molex …

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Re: SD-IDE or CF-IDE adapters - Is there any recommended model/make?

Posted on 2021-12-22, 14:48

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Been using these cheap adapter boards in two systems, all ok, CF cards were running in UDMA on Pentium build: converter1.jpg converter2.jpg Apparently those were meant to host two cards, but I couldn't find dual-card version. Later found this kind of SD-to-CF adapters. Works fine with card readers, …

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Re: 256MB Micron memory module triage and repair

Posted on 2021-12-21, 10:21

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That should be the bypass caps. The exact value is not critical at all within reasonable range. It can be twice larger, likely will work ok even with twice smaller values. The ESR is what's critical with this application.

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Re: Identify electronic component from vintage laptop (Raven/Panasonic)

Posted on 2021-12-19, 21:09

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

snufkin wrote on 2021-12-19, 20:17: it might be interesting to have a go at hacking that cover off That cover looks and feels just like a ceramic, or at least some powdery clay baked to the state of ceramic. Hacking that off would mean destroying a substrate - likely also a plain old white ceramic …

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Re: Bought these (retro) hardware today

Posted on 2021-12-18, 19:04

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well, that's definitely not an original EGA, having parallel port integrated... From what I was able to find about DIP switches it should be able to drive 40x25 and 80x25 color monitors, CGA emulation on EGA monitor, and some "monochrome + CGA 40x25 / CGA 80x25" monitors.

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Re: Bought these (retro) hardware today

Posted on 2021-12-18, 17:25

by

by vstrakh

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Bought two video cards, old EGA one based on Citygate D10 chip, and CGA/EGA/VGA combine OAK-VGA-16. Mostly interested in playing with TTL outputs with old non-VGA timings. Filename Citygate_D10.jpg File size 859.17 KiB Views 302 views Filename oak-vga-16.jpg File size 962.22 KiB Views 302 views

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