Re: Another "cannot get CF2IDE to work in DOS" topic

Posted on 2024-04-16, 17:30

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Motherboard from auction site looks like Shuttle HOT-419: https://theretroweb.com/motherboards/s/shuttle-hot-419-ver.1.1 TheRetroWeb provides BIOS image for it, so there a chance that it is newer than yours (note inside archive says: "5/96 - Latest AMI-Bios 419AIP06.BIN for HOT419DZ") There is also …

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Re: Another "cannot get CF2IDE to work in DOS" topic

Posted on 2024-04-16, 11:51

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Can you connect this CF2IDE (again) with this particular card to your P75 computer and detect card from BIOS ? Unfortunately 8GB limit may apply to P75 as well :( Is this (486) one of those custom OEM systems (HP, Dell, etc.) or motherboard is from "good known" brand ? ;) If the latter - there is a …

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Re: Extremely poor performance on specific Socket 370 motherboard. Chipset?!

Posted on 2024-04-16, 05:26

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Via memory enabler is indeed good solution, but it may not be necessary if there is "Memory Interleave" option in the BIOS. Usually '4 way' is the fastest setting. You can compare results with SiSoft Sandra memory test (I'm using version 99 but 2001 is also good) . Also - do some synthetic …

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Re: Multimeter recommendation

Posted on 2024-04-08, 22:25

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Which brings me to one more feature I would like it to have, and that is that it has automatic value change. The usual name of that feature is "autorange" or "automatic range selection". Yes, thank you! Couldn't remember the word, so I tried to explain it 😁 Then probably UT33A+ will be more …

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Re: Multimeter recommendation

Posted on 2024-04-08, 19:10

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If you want something very cheap but good, I can suggest UNI-T: UT33+

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Re: ATX PSUs with a single AT power connector?

Posted on 2024-03-31, 12:11

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

If we're talking about ATX PSUs with AUX connector I remember Codegen brand (from early P4 period- typically 300W). If we are at motherboards, then surely Jetway P4XFBU or P4XFCU

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Re: What is the deal with S3's Chrome cards?

Posted on 2024-03-29, 09:56

by

by zyga64

in Marvin \ Video

in Marvin \ Video

I remember that on allegro.pl there were DeltaChrome cards in the days when they were new. But it didn't inspire me to buy one after reading reviews on several sites 😀

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Re: Old power connectors

Posted on 2024-03-29, 07:02

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm from Poland.

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Re: Old power connectors

Posted on 2024-03-25, 08:59

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I would just desolder the power connector from an old broken unrepairable motherboard. If you only need one piece, I can send it to you.

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Re: 32GB SD-to-IDE detected as 8GB in BIOS on QDI P5I430VX-250DM V3.0

Posted on 2024-03-18, 06:39

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

You can also use bios patcher from rom.by https://youtu.be/VwZT40sRMzM and https://youtu.be/0KBYj1vx3zQ BTW. Both yt channels are excellent. Kudos for Scorp and B&B !

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Re: SOYO SY-025L2 VLB CMOS Battery

Posted on 2024-02-23, 20:06

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Second pin (-) goes to GND. You can't see it because this board has more than just two layers. And GND layer is inside. If you want to use CR2032 check with multimeter which diode is connected between +5V on PSU connector and battery's (+) and remove that diode.

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Re: 32-bit OS that will run best on 8MB 386sx-16

Posted on 2024-02-10, 08:00

by

by zyga64

in Marvin \ Software

in Marvin \ Software

Maybe use lighter WM like Window Maker or JWM (or something from that era). Gnome was considered heavy even at that time (2002 - Debian 3.0 release) You have encouraged me to see how Redhat 5.2 (from 1998) will run on a 486DX33 😀

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Re: Native PS/2 mouse implementation for 386/486 boards using the keyboard controller

Posted on 2024-02-09, 12:55

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

My board uses a simple LC filter with the 470uH/47pF giving a ~1MHz cutoff. This isn't a part of the design that a ton of thought went into admittedly, but it seems to work well so I stuck with it It works for me too :) I used your project and can report success with Soyo SY-025N2 (after modifying …

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Re: Native PS/2 mouse implementation for 386/486 boards using the keyboard controller

Posted on 2024-02-08, 09:59

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It seems that for EMI Filters/ferrite beads - inductance is not main factor/unit (what confuses me a little)... It is impedance at 100MHz frequency ! This is interesting read (well, at least for me :) https://www.alliedcomponents.com/blog/ferrite-bead-inductor Also this: https://www.allaboutcircuits …

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Re: Native PS/2 mouse implementation for 386/486 boards using the keyboard controller

Posted on 2024-02-08, 07:35

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

@maxtherabbit May I ask the value of chokes L1 and L2 in your "ps2interposer v3"? There is description which states 470uH, but I wanted to make sure. Shouldn't these be ferrite beads / EMI filters? If so - what value?

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Re: List of VLB IDE Controllers

Posted on 2024-02-01, 10:09

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thank you very much. My controller looks a little different. I have a question about how to disable the second channel in the controller. My controller is single-channel. When installing the driver, the computer freezes and looks for an entry for the second channel. Without a driver, the controller …

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Re: Is -5VDC needed to power a XT system?

Posted on 2024-01-24, 08:34

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Given that PC PSUs are designed to support "worst case" (fully loaded system) - I'd guess that you could just regulate -12 down(up?) to -5 . A lot of PSUs from that era were designed that way anyhow ; the -12volt rail is produced by the SMPS output transformer, and the -5volt rail is derived from a …

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Re: Old ISA 8bit LAN Card help!!!

Posted on 2024-01-19, 10:17

by

by zyga64

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

It will be far easier to find ISA card with RJ45 socket (3c509 for example) which can work in 8 bit slot, because for BNC-only you need: - (old) Ethernet hub with BNC connector to connect it to existing network, - 50 Ohm coaxial cable, - 2x T-connectors, - 2x terminators https://en.wikipedia.org/ …

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Re: Convert mp4 to windows95 compatible media (realplayer/mpeg1)

Posted on 2024-01-19, 09:57

by

by zyga64

in Marvin \ Video

in Marvin \ Video

mp2enc from mjpegtools package (I'm using Debian 12) can encode Mpeg1 Layer 1 audio (and of course Layer2 which is default). So, you should be able to mux it later with mpeg1 video into mpg container with ffmpeg.

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Re: Future nostalgia?

Posted on 2024-01-18, 08:43

by

by zyga64

in Milliways

in Milliways

(...) Personally, the current times are the worst of my life (until now), not just because of technology. I felt home the most somewhere in the 90s. It was the fading 20th century, when cold war ended and the wall fell. It was a time when me and my friends could still image that world peace might …

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