Re: Possibility to write OPL3 sound driver for protected mode games

Posted on 2023-02-10, 10:44

by

by georgel

in Marvin \ Sound

in Marvin \ Sound

I'd propose you for testing purposes to make sure your interception of IO ports, DMA and IRQ emulation is fine and bug free to initially build a software that redirects virtual DMA/IRQ and IO ports to a physical ISA sound blaster or compatible sound card present in that very testing machine at …

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Re: Possibility to write OPL3 sound driver for protected mode games

Posted on 2023-02-10, 09:24

by

by georgel

in Marvin \ Sound

in Marvin \ Sound

I'd propose you for testing purposes to make sure your interception of IO ports, DMA and IRQ emulation is fine and bug free to initially build a software that redirects virtual DMA/IRQ and IO ports to a physical ISA sound blaster or compatible sound card present in that very testing machine at …

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Re: Possibility to write OPL3 sound driver for protected mode games

Posted on 2023-02-10, 02:40

by

by georgel

in Marvin \ Sound

in Marvin \ Sound

I've updated the HDPMI & SBEMU code following your advice, now IOPL0 is used and TF is also cleared. Just for the record: the trace flag being cleared is preferable if one does single-step over an IN/OUT instruction. If TF is NOT cleared, the debugger stops inside the IO trap handler then. Sure, I …

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Re: Possibility to write OPL3 sound driver for protected mode games

Posted on 2023-02-09, 09:49

by

by georgel

in Marvin \ Sound

in Marvin \ Sound

[Why there's a IRQs being handled while the previous IRQ isn't "finished"? I think the IF should be always cleared when handling IRQs. Your interrupt handler may be calling other code that may unexpectedly to you reenable interrupts. If you are using a high-level language for your interrupt hanler …

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Re: Possibility to write OPL3 sound driver for protected mode games

Posted on 2023-02-06, 23:56

by

by georgel

in Marvin \ Sound

in Marvin \ Sound

FYI MAME has more accurate Sound Blaster emulation than dosbox. They even run the actual creative's 8051 firmware (as far as I remember V4.13) on an emulated 8051 MCU.

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Re: Quick question about AWE64 and external midi

Posted on 2022-11-08, 07:51

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by georgel

in Marvin \ Sound

in Marvin \ Sound

Ah, now I understand. You want to know if AWEUTIL provides an intelligent MPU-401, as in MT-32 emulation, but for the physical MIDI connector? Yes, exactly. Or if SoftMPU would work just like on a normal SB16 so I can hook it up to a real MT-32 or a SC-55 or anything connected to the gameport/MIDI …

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Re: Sound Blaster AWE64

Posted on 2022-10-20, 07:43

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by georgel

in Marvin \ Sound

in Marvin \ Sound

But maybe the whole card sustained a major PSU failure so one can expect more defective ICs even if they don't get hot when powered.

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Re: Orpheus II soundcard thread

Posted on 2022-09-11, 02:31

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by georgel

in Marvin \ Sound

in Marvin \ Sound

carlostex wrote on 2022-09-10, 22:55: Not to mention the actual money needed to acquire each separate. Yep, a crystal based sound card costs about $30 on fleabay, and with the release of ARGUS PCBs the Gravis clone is about $40...

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Re: Orpheus II soundcard thread

Posted on 2022-09-10, 19:03

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by georgel

in Marvin \ Sound

in Marvin \ Sound

had to sacrifice something because of limited ISA slots? This one obviously is a 3 on 1 card, so whether you only have 1 or 2 ISA slots, ISA slots' signals are in parallel therefore having more ISA slots is just a matter of plugging an old ISA slot riser or similar backplane to have more ISA slots …

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Re: Orpheus II soundcard thread

Posted on 2022-09-10, 18:57

by

by georgel

in Marvin \ Sound

in Marvin \ Sound

.

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Re: ARGUS Project thread - now sold out (gerbers will be released soon)

Posted on 2022-09-07, 20:19

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by georgel

in Marvin \ Sound

in Marvin \ Sound

It is a tremendously valuable community (mostly), and it would be a shame to have it end up even more locked down because people feel entitled to copy/use whatever they want right out in the open. As long as it is censored moreover by incompetent but authorized individuals it is not valuable at all …

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Re: ARGUS Project thread - now sold out (gerbers will be released soon)

Posted on 2022-09-07, 07:24

by

by georgel

in Marvin \ Sound

in Marvin \ Sound

Do you like to work for free? I have worked many times for free (even for vogons!). Sometimes work gives pleasure but has no commercial potential. Copyright law is the main thing that significantly retards the human race's advancing (this is my copyrighted conclusion ;) ). The informational product …

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Re: ARGUS Project thread - now sold out (gerbers will be released soon)

Posted on 2022-09-06, 09:35

by

by georgel

in Marvin \ Sound

in Marvin \ Sound

The dump is on archive dot org, so no problem You know, you shouldn't be openly pointing that out here, and it probably shouldn't be posted there, either. That was never publicly released content, and at least two of the rights-holders are still in business. If one of them is still reading along …

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Re: AWE64 Legacy

Posted on 2022-09-06, 06:02

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by georgel

in Marvin \ Sound

in Marvin \ Sound

Ascended wrote on 2022-09-06, 05:22: can I reserve a card for my brother if still available It is highly probable they will be available for long time to come but if not there are plenty of ISA AWE64's on ebay and other stores that cost some 10 times cheaper and do nearly the same job and are based …

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Re: HP MM Pro 16V-A with AZT2320 chip. PC Speaker connector!

Posted on 2022-08-31, 21:41

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by georgel

in Marvin \ Sound

in Marvin \ Sound

Btw, does anybody know what is the center connector means? I saw on eBay it is selling with ribbon cable from it, 9-pin (10). Wondering if it is front Audio panel? That would be great! I can't find any information about it, as I said, I have no idea how to test it... You may find it on page 90 -- …

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Re: ARGUS Project thread - now sold out (gerbers will be released soon)

Posted on 2022-08-24, 20:05

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by georgel

in Marvin \ Sound

in Marvin \ Sound

IcySon55 wrote on 2022-08-24, 17:06: This thing was not cheap... Anybody need some chips burned? 🤣 It is very cheap on ebay -- less than $8: https://www.ebay.com/itm/324434081064 On ali should be several times cheaper...

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Re: Orpheus II soundcard thread

Posted on 2022-08-19, 18:09

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by georgel

in Marvin \ Sound

in Marvin \ Sound

Nobody of you I guess heard how the Gravis part of this preliminary sound card sounds (it uses a different version of the interwave chip from the one the genuine GUS used) but you are ready to pay and in advance just judging from the pictures you saw...Are you such great electronics experts? Or …

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Re: DOS32AWE - DOS/4G compatible DOS Extender with Sound Blaster AWEUTIL MIDI synthesizer support for Protected mode,V

Posted on 2022-08-15, 05:54

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by georgel

in Marvin \ Sound

in Marvin \ Sound

I am not impressed by your reversing skills. You don't need to be impressed. Anyway, here is a repository with usable source code: https://github.com/karcherm/dos32awe I know some people are annoyed that recent versions of DOS32AWE refuse to work with EMM386. The code enabling this behaviour is …

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Re: Help needed with OPL testing

Posted on 2022-07-31, 17:40

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by georgel

in Marvin \ Sound

in Marvin \ Sound

elyosh wrote on 2022-07-31, 17:02: georgel wrote on 2022-07-31, 16:54: What does OPLProbe use as a timing reference under DOS? A 100KHz PIT counter is used for timing. Which channel and which mode?

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Re: Help needed with OPL testing

Posted on 2022-07-31, 16:54

by

by georgel

in Marvin \ Sound

in Marvin \ Sound

What does OPLProbe use as a timing reference under DOS?

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