Re: Dataexpert 8049 (socket3) voltage regulator

Posted on Yesterday, 22:14

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Oh my, I own the very same board and it works ... But I am missing the original bios !! Can you please make a dump of it ? I'll add it here https://www.ultimateretro.net/motherboards/1491 (this board has been one of my motivations to make UR.net !) I'll help you finding the reference asap ! (Funny …

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Re: Computrend Systems Contaq-486 Motherboard

Posted on 2021-10-24, 15:50

by

by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I added jakethompson1's image and bios to UR.net 😀 https://www.ultimateretro.net/motherboards/5521

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Re: The Ultimate Retro project (formerly known as UH19) - a stason.org/TH99 alternative

Posted on 2021-10-24, 11:52

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

How well can the new site be archived ? What do you mean ? maybe you should make a pointer to the new site at the old location now that links to it have already been spread all around, or even better just redirect to the specific page locations. Yes, this is in progress. TL;DR, the reason for this …

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Re: Chaintech 5RSA0 Jumper Settings

Posted on 2021-10-21, 22:25

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Check the jumpers on page 15 (labeled 9) and 16 (labeled 10) in the manual. This is all you should need to setup your K6. Set the voltage accordingly to your CPU, then set the FSB and finally set the multiplier. You can even guess what the settings were by looking at the pattern for the multiplier : …

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Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-21, 07:10

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

No, somebody probably uploaded a picture or the post string but never posted that version online, so it will be missing until someone finds it and sends it to us

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Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-20, 15:37

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

This manual is the same I used to create the pdf. However like I said I own the entire manual, I scanned it, I now need to assemble it into a pdf (and perhaps ocr it) Edit : it's online on the win3x page !

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Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-19, 18:46

by

by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

By the way, I own the full manual for this board, it should come soon. The one in the uh19 page is incomplete and in a really bad quality.

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Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-19, 16:45

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here's a closer photo

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Re: Help with a Socket 3 board

Posted on 2021-10-19, 06:58

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Make sure the ram is FPM and not EDO memory

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Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-18, 11:19

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Use this utility to dump your bios : http://cd.textfiles.com/microhaus/mhblackbox3 … MORY/GETROM.ZIP As for the picture, check the link I put previously, there's a clean photo 😀 (if it's not good enough I can make a closer one)

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Re: Chicony CH-498B voltage regulator mod help.

Posted on 2021-10-18, 07:59

by

by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Too bad I didn't see this post before, I have this exact same board (here http://www.win3x.org/uh19/motherboards/7821) Though I got mine this year, it wouldn't have been possible back in 2020. In the meantime, could you please dump your bios ? There seem to be many revisions and mine isn't the …

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Re: Retro engineering of old AMI bioses ?

Posted on 2021-10-17, 16:27

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Well it depends of the country I think. In the us having a team documenting the code and another team rewriting the code from scratch using the documentation is legal (this is how they managed to retro engineer IBM's BIOS afterall). And I believe this is how mario 64 got retro engineered. Meaning …

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Re: Unknown motherboard

Posted on 2021-10-17, 10:40

by

by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Whoopsie, I fixed that 😁

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Re: Retro engineering of old AMI bioses ?

Posted on 2021-10-17, 10:32

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Another example for 386 motherboards ; we could probably implement support for the L1 cache of the Cyrix 486DLC that later boards had to older boards. What do you think ? Is it too crazy ? Another idea that will be scrapped in a week ? Any of you interested ? This one may be tricky. As I recall an …

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Retro engineering of old AMI bioses ?

Posted on 2021-10-16, 23:08

by

by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Hello, since I've started the project UH19, I have been thinking about something kinda crazy which I can't do myself, but that would be interesting for many people in my opinion which involves understanding AMI bioses better (and perhaps other bioses as well, but the 64KB AMI bioses are probably the …

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Re: What retro activity did you get up to today?

Posted on 2021-10-15, 10:10

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

I'm also against Right To Repair. Well, this kind of idiocy deserves a thread of its own. there is an argument that states "companies can make things how they like and the consumer can choose not to buy it" except that clearly isn't the case, and hasn't been for a long time there are various …

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Re: Need help identifying a 386 board

Posted on 2021-10-14, 21:10

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Here is some info on the 486 version which is strikingly similar. Right down to details like the layout of the front panel connectors and the Victor QS sticker in the corner. Unfortunately the previous owner glued the heat sink to the CPU (likely a Cyrix DX2/66). I did not want to remove the CPU …

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Re: 386 board that takes 64mb ram?

Posted on 2021-10-14, 09:54

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Nice case ! I love this design Also yes PCChips is not reputable at all. Though they can still make a nice retro PC. Just be aware that they were scammers that tended to lie on stuff like cache and use really low quality components (thin PCB and cheap connectors). The cache issues can be fixed on …

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Re: Gotek like Optical Driver Emulator - Is it possible?

Posted on 2021-10-14, 09:41

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

ATAPI is more demanding for a microcontroller than SCSI ? Because there are people that made a SCSI emulator just with a stm32 https://github.com/erichelgeson/BlueSCSI https://m.youtube.com/watch?v=81tLrZeMP8U (Which I think can also emulate a SCSI CD-ROM drive)

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Re: Gotek like Optical Driver Emulator - Is it possible?

Posted on 2021-10-13, 22:43

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by Deksor

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Thanks for being another voice of reason in the thread. 2-4X should work for the really old retro PCs. Once you start getting into Win98, possible 95 it's possible to use software virtual CD-ROMs that support CD audio which you can't run under DOS. I have to wonder if a simple board that has a …

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