Re: "Input not supported" error when resolution set to 800x600 256 color

Posted on Today, 05:14

by

by Tiido

in Marvin \ Video

in Marvin \ Video

This corruption problem is definitely because of the memory chips on the card as thought of earlier, nothing short of replacing them will get you working high resolutions. The chips simply are too slow. It sounsd like modifications are not an option to the particular card so you will have to live …

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Re: is this everex cs4232-kq, cs9233-cq, cs4112-cs soundcard a direct clone of any other card?

Posted on 2023-05-31, 04:20

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Babasha wrote on 2023-05-29, 16:27: Ls244 + Ls245 is Opl3 clone?!))) Not on this card, the chips don't have enough pins to be OPL3, the 244 and 245 on it are actual 244 and 245 and are there for CD interfaces. 9233's FM emulation is quite terrible indeed 🤣

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Re: Turbo button on 486 acts like a 'sleep' button

Posted on 2023-05-30, 12:25

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Ok, labelling would suggest that they do go into the right place, but the observed behaviour suggests otherwise. But the second row is worth looking at. What motherboard is in the machine ? Do you have photos ? You might be able to find it here along with some documentation : https://theretroweb.com …

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Re: Turbo button on 486 acts like a 'sleep' button

Posted on 2023-05-30, 12:03

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Sounds like the button and LED are wired to "Green switch" and indicator, which basically is a sleep kinda deal. See where exactly do the switch and LED connect to on the motherboard.

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Re: "Input not supported" error when resolution set to 800x600 256 color

Posted on 2023-05-28, 01:14

by

by Tiido

in Marvin \ Video

in Marvin \ Video

This card produces a 56Hz output in 800x600 from what I remember, LCDs tend to be quite picky with what they'll display and many ISA cards output timings many LCDs are not particularly fond of, especially low end things like these Tridents.

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Re: Did early sound cards actually process all the sound effects?

Posted on 2023-05-27, 06:11

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

The Amiga for example, had 4 independent mono channels that could pan to left/center/right and run at different sampling rates. Not quite accurate, Amiga has the 4 x channels, but the panning is two permamently panned to left and two to right, one cannot choose where a particular channel pans to. …

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Re: Roland MT-32 CM-32L upgrades?

Posted on 2023-05-26, 21:24

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by Tiido

in MT-32 General

in MT-32 General

This is for 2nd generation MT32s without the PGA LA32 chip, for these you simply use CM32 or LAPC program ROM and burn a new sample ROM with the extra sounds and you get all the fun. You might have to solder a wire to bring in the highest address line to the sample memory chip. 27C801 and one wire …

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Re: Small CRT monitor for DOS applications/games - this is the way

Posted on 2023-05-25, 20:18

by

by Tiido

in Marvin \ Video

in Marvin \ Video

It can be a rabbit hole but it ceratinly is difficult to find stuff that hasn't seen huge hours of use. I once got a 17" monitor where previous owner had accidentally spilled water into in past. I repaired the few bad parts in it and it actually gave a super bright and nicely focused image …

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Re: Toshiba 300CDT - broken Sound Blaster PCM playback

Posted on 2023-05-22, 03:25

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

DN2 uses ADPCM sounds that most sound cards, including YMF71x, do not support. There is a patch to the game (and few others) that replaces these ADPCM samples with uncompressed PCM ones but I don't know any further details.

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Re: CT3670 RAM

Posted on 2023-05-21, 22:39

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Take a pencil eraser to the ISA connector of the card, this will clean things up and at least rule out one problem. Perhaps try different versions of the Creative drivers, there are a number of versions around.

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Re: CT3670 RAM

Posted on 2023-05-19, 06:57

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

Ideally you need two matching sticks, your options are 2x 1MB, 2x 4MB and 2x 16MB. Parity SIMMs will work but are not good to use on these sound cards because the parity lines are not connected and any digital chip with floating inputs can do strange things. The sticks you got should mix and work …

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Re: Sound Blaster: From best to worst

Posted on 2023-05-11, 09:05

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

I actually had similar experience with one other card, I used a MC33079 and things suddenly got a lot more noisy, in addition the output current seemed to be too low and I got excess distortion from there... buuuuut those were ebay chips from china and they may very well have been relabeled LM324 or …

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Re: Sound Blaster: From best to worst

Posted on 2023-05-10, 21:50

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

It depends a lot on what is going on in the particular machine and exact opamp itself as far as the floating opamps go. The high impedance inputs are going to react to whatever can disturb them (in this case seems mostly internal to opamp) and since the loop is open, maximal gain of the opamp is …

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Re: Creamware Tripledate - any good

Posted on 2023-05-08, 11:53

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

This card is only useful for the special software environment it was made for, i.e not a general purpose thing and definitely not useful for games of any sort (the MIDI interface will not be MPU401 compatible).

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Re: List of open-source PC hardware projects

Posted on 2023-05-05, 16:30

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

That is a clever idea, at first I thought it will have some timing related issues but now that I look at datasheets more, it actually should work without any problems with only exception being the additional loading on CAS line causing some timing margin reduction but that only matters for very fast …

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Re: Aphex' Aural Exciter - Uh-oh, it's Magic

Posted on 2023-05-03, 05:07

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

I briefly listened the one track I knew from these and wow, what a difference lol. I'll have to do a proper listen with something beyond crappy laptop speakers to evaluate artifacts etc. later ~ EDIT: I listened through the Depeche Mode track on big speakers now and the main negative thing I noticed …

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Re: 1993 and 2023 had a baby and it's BEAUTIFUL. MS-Works 3.0 for DOS networked and syncing with Google Drive

Posted on 2023-05-02, 02:27

by

by Tiido

in Marvin \ Software

in Marvin \ Software

Hahahaha, this is excellent ~

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Re: MIDI volume when using WSS on a YMF card.

Posted on 2023-04-30, 01:42

by

by Tiido

in Marvin \ Sound

in Marvin \ Sound

One of the AUX levels is WB header + FM volume (other is CD input), setting it right should make things work out. YMF71x switches between SB and WSS settings automatically.

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Re: KVM switches: which ones degrade VGA the least?

Posted on 2023-04-24, 20:49

by

by Tiido

in Marvin \ Video

in Marvin \ Video

Almost all the KVMs I have seen use similar kind of switching mechanism using two transistors (one for termination when input isn't selected so video card still detects "monitor connected" and other to pass signal through) and it will produce an impedance mismatch as there isn't 75ohm termination …

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Re: Does the S-Video output of ASUS EAX550GE/TD/256M/A support component video (YPBPR)?

Posted on 2023-04-20, 02:06

by

by Tiido

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

7 pin connector like that should have YPbPr capability with the right breakout cable.

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