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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Re: Custom interposer module for TI486SXL2-66 PGA168 to PGA132 - HELP!

Posted on 2023-01-26, 08:15

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by MJay99

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

SXL2_interposer_alpha2_scan.jpg Is it just me, or does this scan indeed show a D shaped soldermask opening around round pads (as sphere suggested)? It also looks like all the squared pads (for the connectors) came out round, albeit with a squared soldermask opening. Then, the scan looks as if all …

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

Posted on 2023-01-24, 13:45

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

One thing to note is that Mod Master XT doesn't use DMA, so changing the DMA interval will have no affect on how it sounds. I've done very little testing of it, so I'm not sure what would be causing it to not be perfect – typically programs that use port-based IO only work the best. Mod Master XT …

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

Posted on 2023-01-23, 08:07

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

appiah4 wrote on 2023-01-23, 07:37: 3. Is there a good documentation of all current PGUSINIT switches (including firmware flashing form command prompt) anywhere? I might be able to at least help with that: https://github.com/polpo/picogus/tree/main/pgusinit Otherwise, a pgusinit /? is gonna show it …

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

Posted on 2023-01-22, 21:22

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

Turns out, the whole issue of missing notes was an intermittend / failing I2S module - seems it had lost the left channel occasionally in the beginning, which is what I noticed as missing notes. Now it failed completely, which made it finally obvious. Checking with an oscilloscope, I could see the …

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

Posted on 2023-01-22, 16:33

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by MJay99

in Marvin \ Sound

in Marvin \ Sound

I think any differences you hear in how playback performs from run to run is down to pure chance. You're right, whatever made it drop an occasional note or effect before, I wasn't able to reproduce it by any change in /d xx settings now. It was noticable during the very first run I did (when I was …

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