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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-19, 07:04

my compaq armada e500 laptop has a 440bx chipset and the system architecture block diagram in the user manual clearly indicates the ac97 codec. does this mean sbemu should work? the audio chip is an ess es1978 and it's working under pure dos using ddma; however, the opl3 midi is a wavetable hybrid …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-19, 07:00

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 …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-19, 06:55

Still no sound with /VOL9. I also get no sound with MPXPLAY even that it detects IHD. Maybe the driver from MPXPLAY is the problem? This is the device: Bus 0 (PCI Express), Device Number 20, Device Function 2 Vendor 1002h Advanced Micro Devices, Inc. [AMD/ATI] Device 4383h SBx00 Azalia (Intel HDA) …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-19, 06:41

@stamasd: Please read my post again. I already wrote, MPXPlay plays nice on this one. But SBEMU not. So something is wrong (either with me or with SBEMU). And no, its not a HD codec, its oldstyle AC97. EDIT: Just saw on Wikipedia, there is a 8237"A" variant which indeed has HD-Audio instead of AC97 …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-18, 14:26

I can further reduce the period buffer size and build a low-latency-testing version for you to test. but small buffer may also cause distortions since interrupt routines might not be called strictly in time that can feed enough data to the soundcard. Hmm, I am interested in trying this since my …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-18, 13:10

I have a discrete PCI sound card installed on the target system that works along with the onboard HDA (they're being used by different OSes), and both may be used for SBEMU, so I want to manually choose the audio device I want to use SBEMU with. EDIT: Just took a look at the code and it doesn't …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-17, 17:20

Intel HDA got me interested. Does this mean all codecs on the HDA Bus or just Intel? The HDA bus is a very different beast from AC97 and if you managed this I would be twice as thrilled as I already am about this project. Not just Intel, according to the source code of MPXPlay, it also supports …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-16, 23:25

Intel HDA got me interested. Does this mean all codecs on the HDA Bus or just Intel? The HDA bus is a very different beast from AC97 and if you managed this I would be twice as thrilled as I already am about this project. Not just Intel, according to the source code of MPXPlay, it also supports …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-16, 07:03

By default the PCI buffer size is 16384 bytes, and 16 bit stereo 22050Hz PCM format will be used, and so the total delay of the buffer is about 185ms, you may use "/k44100" to use higher sample rate, which will halve the delay. I already did have that setting turned on in my testing. Is it possible …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-16, 06:53

2. I think no one tested SBEMU on VIA VT8237R yet? At least, I haven't read about it. No, not tested. Interesting that MPXPlay's source doesn't have VT8237R but only VT8233/VT82C686, it might be a compatible chip. Unfortunately I only tested it on a VT82C686 laptop. I'll check the code again to see …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-16, 06:43

Nice piece of software! Did some initial testing on a few systems: AMD B450 (MSI B450M MORTAR TITANIUM): Working, used front panel audio connector. AMD RS880M (Toshiba Satllite C660D-113): Intializes with /I5 option, Duke Nukem 3D and Doom starts without complaining but i hear no audio. Tried the …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-16, 06:36

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 (nForce boards not tested so …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-15, 07:59

Well, yes, of course. I had problems with those SB PCI cards on a second machine that I tried. Turned out that it's not a good idea to enable interrupts for the sound card before the sbemu IRQ handler is installed. So I modified sbemu a bit and it worked ... I remember the IRQ is unmasked after IRQ …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-15, 07:47

The latency might depend on the game? With Duke Nukem 2 on a P3 I'm seeing maybe 50-100ms latency but less than I can properly notice for sound effects. ... edit 2: just observed latency for myself, it's particularly obvious in the menus of doom but far less apparent in actual gameplay The latency …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-10, 13:23

The source code of SBEMU can be found here: https://github.com/crazii/SBEMU I have tried compiling the source using djgpp from http://delorie.com/djgpp/zip-picker.html inside DOSBox. I installed it on the emulated disk inside DOSBox, used RHIDE to open the project and generate the makefile ( …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-10, 09:38

Hi, I just tested the latest ver. SBEMU from github but it doesn't work on my system (in signature) with SB Audigy1. Anybody else had a success on a SB card? It detected PCI device SB Audigy but after messages that "RM and PM support: enabled" it beeped from speaker and ended with "Internal stack …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-10, 09:34

Ah OK that clarifies a few things. By "author" I meant the author of SBEMU and the OP in this thread. FWIW, I did test also with version 5.84 of jemmex and jload. The same crashes happened. (and indeed on my test system - the Zotac Zbox - version 5.84 does not enable UMBs whereas previous versions …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-08, 07:54

The harder part would be how to distinguish different devices of the same nature, particularly common for Intel HDA (onboard, HDMI, or even Sound Core3D), as well as USB Audio Class devices. One most likely will need to obtain their vendor:device IDs in order to tell them apart. The used MPXPlay …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-08, 07:52

Yes, i can confirm i have analog connection between the analog out header on the CD-ROM to a header on the soundcard. also analog audio is working OK on Dos via default creative live dos driver, can it be a problem with sbemu parameters setup? This is most likely a mixer problem. SB Live DOS driver …

Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-03-08, 07:51

Nice piece of software! Did some initial testing on a few systems: AMD B450 (MSI B450M MORTAR TITANIUM): Working, used front panel audio connector. AMD RS880M (Toshiba Satllite C660D-113): Intializes with /I5 option, Duke Nukem 3D and Doom starts without complaining but i hear no audio. Tried the …

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