Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-07-17, 22:20

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

The Pico in question seems to be a bootleg, not a genuine.. Oh, then they might come with a different onboard flash (which might then need a differently compiled firmware). I also had some from Ali with a totally different pinout... I haven't tried the picotool for the picogus, but with the pico …

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Re: PicoGUS: ISA sound card emulator with Raspberry Pi Pico (Gravis Ultrasound, AdLib, MPU-401, Tandy, CMS)

Posted on 2023-07-17, 22:08

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

Unless you already did that: I'd personally blindly go over all pins in a drag-solder way with a lot of flux, before I'd even start investigating much. With a UART to USB adapter (at 115k baud) you could also attach to the pico and see if at least polpo's firmware comes up (this has actually helped …

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Re: SB16 + GUS Classic + PCMIDI/MT-32 for DOS/Win3.11 - should this "just work"?

Posted on 2023-06-16, 09:23

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

I actually have run into an issue with IRQ 11: Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers! The reason being (affecting the Apogee Sound System there): - GUS only supports IRQs below 8. At higher IRQs, the dos extender seems to be too …

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Re: Can this Gravis Ultrasound PnP be repaired?

Posted on 2023-05-30, 16:06

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

Now that's a great step forward, thank you for the update, ales! :) Always great to hear an ultrasound is back amongst the living! Btw. I've had a quick look at the PCB and it seems a reversed ROM might not cause damage to the ROM - the VCC pin is actually a N/C if reversed (which makes VCC go to an …

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Re: STB Ultrasound 32 Pro (Compaq Interwave sound card) - The comprehensive guide

Posted on 2023-04-26, 09:12

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

They probably just took what's available (or cheapest) to them during the production run. For those on a 12V line (if that's even used on this card), 16V might be cutting it a bit close and I personally would rather go with 25V, but on 5V, both would be perfectly fine, I'd say.

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Re: MediaVision jazz16 - Sound playback at incorrect speed (high speed, high pitch)

Posted on 2023-03-21, 21:25

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

I was actually thinking exactly the same as Tiido and wouldn't have thought that a missing -5volts would affect much else than maybe an amp section. But, under the link Joseph_Joestar posted, they're really listing exactly this phenomenon for a missing -5volts and a JAZZ16. Seeing something new …

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Re: MediaVision jazz16 - Sound playback at incorrect speed (high speed, high pitch)

Posted on 2023-03-16, 22:39

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

I did have a similar effect when I accidentally swapped the two crystals on a soundcard I built quite a while ago. So, maybe it's worth checking if X1 on your card is the correct frequency. Sadly the picture is showing no markings on it, but I found a JAZZ16 card on Ebay that has a 16MHz crystal in …

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Re: Is there any ISA sound card that only needs +5V

Posted on 2023-03-16, 22:23

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

Most ICs would actually be quite happy with +5V alone. But, since you want to decouple from all the noise in the system's power rails, often linear regulators are used to provide a clean(er) 5 volts on audio cards. To do this, you need to come in somewhat higher, which ends up being the second …

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Re: UNISOUND - Universal ISA PnP Sound Card Driver for DOS v0.80a

Posted on 2023-03-07, 21:12

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

@matze79: Now that's really interesting... I went back, just to verify and having proof that it really is working with 0.80a: unisound-080a-base-1.jpg This is on a 486DX2-66 VLB system, with nothing much of a PnP BIOS support otherwise. Both cards I have (one repaired, one in original condition) do …

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Re: UNISOUND - Universal ISA PnP Sound Card Driver for DOS v0.80a

Posted on 2023-03-07, 09:24

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

On both of my cards it's an ATMEL 24C04 and starting unisound 0.80 with /FS does detect and configure it properly, also. Thanks for this hint, too!

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Re: UNISOUND - Universal ISA PnP Sound Card Driver for DOS v0.80a

Posted on 2023-03-06, 23:22

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

@matze79: This actually did help me! I was playing around with the exactly same models of cards a while ago, one with a corrupted EEPROM at first, that I was able to reflash with the correct data, thanks to the nice help of pc-sound-legacy: https://www.vogons.org/viewtopic.php?f=62&t=87634 (the …

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Re: PicoGUS: Gravis Ultrasound emulator on an ISA card with Raspberry Pi Pico

Posted on 2023-02-21, 21:04

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

Just quickly checked Doom II level jumps on my testing rig - seems to indeed work perfectly now, really awesome, thank you!

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Re: PicoGUS: Gravis Ultrasound emulator on an ISA card with Raspberry Pi Pico

Posted on 2023-02-13, 22:15

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

There are a few things I'd change – number one would be putting the RP2040 directly on the board instead of a Pico to gain 4 more GPIOs. Theoretically, there's options with all GPIOs exposed, like this: https://lectronz.com/products/rp2040-stamp There's also versions on Aliexpress with more GPIOs …

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Re: Tube Time: Announcing The Snark Barker, a 100% Compatible SB 1.0 Replica!

Posted on 2023-02-06, 09:03

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

That's also correct: no potentiometer is going to be no sound. If the pot is placed (and not broken, wrong type, or turned all the way down), there should be some sound, even without any patch wire (in fact, I also didn't see one in the schematic -there's a dotted line between the two pots shown …

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Re: Tube Time: Announcing The Snark Barker, a 100% Compatible SB 1.0 Replica!

Posted on 2023-02-05, 22:54

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

There's definitely sound without any wires around the pot (I don't have any patch wire there), so there's probably some other issue at work.

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Re: PicoGUS: Gravis Ultrasound emulator on an ISA card with Raspberry Pi Pico

Posted on 2023-01-30, 22:37

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

On a quick first try: indeed, looks (and sounds) like really good progress again - that's truly awesome! What I found, quickly starting a few games: Doom2: first level plays nicely, but after e.g. jumping to e2m2 (>idclev 22), the music and sound effects get distorted (sounds like clipping to me) …

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2023-01-28, 12:03

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by MJay99

in Release Announcements

in Release Announcements

Yeah there is a limitation with the Apogee Sound System, it doesn't like GUS devices with IRQ higher than 7. I've never looked into why exists this limitation, but the developers did it anyway: There seems to be a small hint in the notes you linked: - GUS only supports IRQs below 8. At higher IRQs, …

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2023-01-27, 22:22

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by MJay99

in Release Announcements

in Release Announcements

Is maybe this an earlier version? -> https://github.com/videogamepreservation/rott/tree/master/audiolib I'm not sure which (version) date it relates to (and couldn't find a changelog in that ROTT source code release), but at least the GUS.c and other files seem to have dates from 1994 The above …

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2023-01-27, 17:54

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by MJay99

in Release Announcements

in Release Announcements

digistorm and Gmbl256, I bow to you both and want to thank you for this quick and perfectly directed pointer! Of course, the IRQ was set to 11 and changing it did help instantly. For some reason, since it's always been set to that known free IRQ in my systems since the stone age, I didn't even …

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Re: FastDoom. A new Doom port for DOS, optimized to be as fast as possible for 386/486 personal computers!

Posted on 2023-01-27, 16:53

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by MJay99

in Release Announcements

in Release Announcements

Is someone currently using fdoom successfully with an Interwave based card (GUS pnp, ARGUS, etc.)? I think it was working at some point (not completely sure, though), but I'm currently unable to get it to work at all. Everytime I choose the Gravis ultrasound for FX and music, it doesn't play …

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