Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-08, 07:49

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

I've gotten no sound. This is on a AC97 - Intel i915. SBEMU finds the chip "Found sound card: ICH AC97". Provided Jemmex is used. Wolf3d, is used for realmode test. Dos Mplayer/Wolf4GW, used for protected mode test. SETBLAST.EXE asks that settings be checked, when test is run. On system power down/ …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-08, 07:45

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

tercio wrote on 2023-03-05, 17:44: Congrats bro! This is a very good project! It's possible include support for Realtek Ac97 chips? Theoretically It doesn't care what AC97 codec you have, but the motherboard, what kind of mobo do you have?

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

Posted on 2023-03-05, 06:15

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Updates: 1. SBLive/Audigy is working 2.add Creative ADPCM support. 3.fix bugs on IRQ routing when IRQ shared (tested with USB mouse) The new zip is uploaded here: https://www.vogons.org/viewtopic.php?f=62&t=93006, this thread is too long (20 pages), download links are hidden is posts. so I started a …

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SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-05, 06:13

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Hi, I'm happy to announce that SBEMU is ready for more tests. :D Purpose: for PCs with AC97/Intel High Definition Audio sound cards that doesn't have Sound Blaster support (vintage PCs after 2000 era, or modern PCs with HDA). Supported PCI soundcards: Intel ICH nForce (nForce2 tested working) Intel …

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

Posted on 2023-03-05, 05:43

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Yes, that was it. However, tried different values with DEBUG - had to go down to 0x240 to make the distortion disappear. Btw, I just tried an Audigy 2 - works as well. You mean 0x3ff doesn't work good but 0x240 works? weird. Strange. Don't know if this also would apply to HDA, (I don't have SB …

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

Posted on 2023-03-04, 19:36

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Hi, I've turned off a switch of HDPMI, tested in VMWare Player and NFS works fine. Can you try this file to see if it works for you? HDPMI32i.zip The only problem is "quit current game" in ESC menu sometimes won't respond to an ENTER key. and dos freeze for once, after exiting, during multiple …

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

Posted on 2023-03-04, 15:26

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

I tested Major Stryker it uses ADPCM, currently not supported yet. Interesting that there're a few games using ADPCM: Re: Why is ADPCM so important? EDIT: tried Commander Keen4, I didn't see any SB port IO in the log. 🤣

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

Posted on 2023-03-03, 19:16

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

In both of your versions the implemented SB mixer allowed me to set digital audio to about 30% and OPL music to about 50% and this way everything was perfect. You may try the /VOL[0-9] option to set volume, this is the overall volume for real sound card. the SB mixer might be reset by a mixer aware …

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

Posted on 2023-03-03, 12:26

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Hi, Can you upload a new version with the fixes/suggestions by Baron von Riedesel ? updated here: https://www.vogons.org/viewtopic.php?p=1144461#p1144461 Hi, Right after the successful detection my Audigy 2 ZS started to produce very loud rhythmic noise so I could not continue the testing. @Baron …

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

Posted on 2023-03-03, 10:25

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

I tested NFS, and found it prefers VCPI over DPMI and thus no io trapping occurs. You need load JEMMEX.EXE in you config.sys before JEMM386.EXE and then in autoexec.bat, AFTER hdpmi is loaded, run "JEMMEX.EXE NOVCPI" EDIT: I tested Screamer and it has sounds. I tried this, but am a little confused. …

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

Posted on 2023-03-03, 08:52

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Yes, that was it. However, tried different values with DEBUG - had to go down to 0x240 to make the distortion disappear. Btw, I just tried an Audigy 2 - works as well. You mean 0x3ff doesn't work good but 0x240 works? weird. Hi, Can you upload a new version with the fixes/suggestions by Baron von …

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

Posted on 2023-03-03, 08:09

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Briefly mentioned this earlier, there is a number of good games that give this error "runtime error (0025) cannot initialize". These are: Jack Jazz Rabbit, Tyiran, Dig it!, Chasm the Rift. I believe there is much more. Baron von Riedesel suggested that the problen is that these are 16 bit protected …

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

Posted on 2023-03-03, 08:05

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

This is caused by low interrupt rate, which encountered at the first and tested by Bondi. I adjust the period size to increase the interrupt rate. Can you try writing to the register addr 0x1a (timer rate/interval) with the value 3ffh ? The comments says 0 == 1024 periods, I've got a bold guess …

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

Posted on 2023-03-03, 07:10

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

- doom/doom2 do have problems with SFX - it's "distorted" and has "echos". DOOM "MBF" has no such problems... This is caused by low interrupt rate (which causes a large advancement of virtual DMA pointer/count that DOOM fails to handle), which encountered at the first and tested by Bondi. I …

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

Posted on 2023-03-03, 07:06

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Yes the first one is a bug that I didn't notice, the second one, I probably handled, but wrote the wrong register. Copy code to clipboard 1 int interrupts = emu10k1_readfn0(card, IPR, 0); 2 emu10k1_writefn0(card, IPR, 0, interrupts); By this way you ack all interrupts, no just the timer.

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

Posted on 2023-03-03, 03:15

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

That's good news. lol Have you tested the latest release? I can modify the code again to test... lol I have just tested it. No difference compared to the previous version. I've enable the half loop interrupt, last time tried period interrupt it seems doesn't have one. zip updated in here: https:// …

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

Posted on 2023-03-02, 14:39

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

I tested NFS, and found it prefers VCPI over DPMI and thus no io trapping occurs. You need load JEMMEX.EXE in you config.sys before JEMM386.EXE and then in autoexec.bat, AFTER hdpmi is loaded, run "JEMMEX.EXE NOVCPI" EDIT: I tested Screamer and it has sounds. I tried this, but am a little confused. …

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

Posted on 2023-03-02, 14:26

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Thanks for clarifying my earlier reply. Note however, that LGPL code may be combined with GPL-incompatible code only when linked as a dynamic library. (Having the emulation cores be loadable modules would also be nice from a technical perspective, since it would make it easier to swap them out and …

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

Posted on 2023-03-02, 13:24

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

OK, I didn't know DOSBox has such restriction, Does that makes DOSBox source code not reusable for any purpose? Even the clone of DOSBox, like DOSBox-X or DOSBox-SVN-Daum are not permitted? Use another sound card driver can be done but it is expensive, meaning starting over and testing again for …

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

Posted on 2023-03-02, 12:30

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

do you have any improvements after change this? Well, what I finally did: insert a display in the ISR, install sbemu and then write - with good old DEBUG - values to the "interrupt enable register" ( offset 0x00C ) until I got messages onto the screen. Seems that bit 2 of INTE must be set to get …

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