Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2024-04-28, 14:49

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

I just found another problem related to Jemm on my test system. M$-DOS FORMAT and even NFORMAT produces garbage FAT on floppy drives. When I reverted back to HIMEM + EMM386 this problem has gone. I can confirm this issue to be generic. It happens if certain ISA DMA registers are trapped by "3rd- …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2024-04-27, 06:22

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

I just found another problem related to Jemm on my test system. M$-DOS FORMAT and even NFORMAT produces garbage FAT on floppy drives. When I reverted back to HIMEM + EMM386 this problem has gone. I'm the author of JemmEx. Errors for JemmEx can be posted on GitHub. I understand that not everyone …

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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 2024-04-24, 07:47

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by Baron von Riedesel

in Release Announcements

in Release Announcements

Has anyone gotten any version of FASTDOOM working in bare metal DOS with SBEMU? Report how you got it working, please. It has been mentioned a few month ago that you have to disable VCPI before launching fastdoom: jemmex novcpi fdoom.exe jemmex vcpi I'm sure there's also an option in the Dos32A …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2024-02-22, 07:28

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

Probably it's "impossible" to change APIC timer from interrupt 5 to another INT which is >=16. So, this is down to a problematic / incorrect BIOS code, wherby the "masking" is LAPIC timer is not functioning correctly. No, this is a pure software thing, this LAPIC registers surely can be altered. …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2024-02-21, 07:34

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

> My sincere apologies for not replying sooner! No Problem. The only issue I can see in your report is that the LAPIC timer is demasked. It's routed to INT 5, which is odd, because it "should" be >= 0x10 to work. So it's "activated", but almost certainly dysfunctional with those settings. However, …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2024-02-17, 08:23

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

Thanks for the feedback ( although I actually questioned zyzzle :) ) There's nothing wrong with the APIC status. In case you cannot interpret the data, the summary is: - the legacy PICs exist in the machine - APIC runs in so-called "virtual wire mode" ( can be concluded by line "Local Interrupt 0 …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2024-02-16, 14:04

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

It's frustrating. I'm not sure if there's another way to convince APIC to get the right IRQ. Any further comments or insight is most welcomed. This problem almost certainly can be solved - the simplest approach probably by not using the sound hardware's IRQ at all, and instead using another timer …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2024-02-12, 17:45

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

wouldnt hijacking 0x40-47 timer accesses solve this? With IO port trapping to 0x40-0x47, we can skip the reprogramming part, but with or without port trapping of the timer, the most tricky part is how to override and call games' handler in a reliable manner. Yes, You would have to prevent client …

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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 2024-01-28, 15:28

by

by Baron von Riedesel

in Release Announcements

in Release Announcements

SBEMU compatibility is still an issue, Sound Blaster initialization is not working properly. For now I've discovered that the DSP version is read as FF.01 instead of 3.01, so I need more to time debug what's really happening. As always, any help is appreciated. Well, I played a bit with Fastdoom …

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SoftMPU adjusted for Jemm

Posted on 2023-12-10, 11:27

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by Baron von Riedesel

in SoftMPU

in SoftMPU

The current SoftMPU v1.91 requires MS EMM386 or Qemm v7.03+. A modified SoftMPU that should also work with Jemm386/JemmEx is attached. The binary was created with MSVC v7 and Masm v6.11d - I don't have MSVC v6.. I don't know if it works, though -I tried with the SB16 emulation of both Qemu and VBox, …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-10-24, 18:17

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

Curiously, even PC Speaker gets muted. Symptomps: Before SBEMU, pcspeaker sounds. When SBEMU is executed (no matter of version), speakers do a pop sound. Then, no sound, neither on PC Speaker. I'm the author of this hdastat utility. In the protocol displayed, I see that after sbemu has been …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-07-19, 05:41

by

by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

I actually think the project should get picked up by FreeDOS. You're probably overrating the FreeDOS crowd's developer capacity. Those guys are quite happy running FD inside VBox and Qemu. What might be considered, however, is to rename the "VDMsound" sub-forum to "SBEMU & VDMSound". These 2 …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-07-15, 08:37

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

exactly which version or build of HDPMI32i is usable for both SBEMU and VSBHDA? I'm asking this, since it's currently unclear exactly which build of HDPMI32i (from sources) is needed for both these emulators to work. Also, are there still two "forks" of HDPMI32i, or is there at this point a release …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-07-14, 11:47

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

Maybe try using the CWSDPMI.exe from duke3d to the affected games? Might be an issue with that extender not playing well with others? That won't work. You should be aware SBEMU needs HDPMI32i - and CWSDPMI and HDPMi32i both are DPMI hosts, that can only be used alternatively. Since you mentioned …

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Re: Error loading SB16 Emu (MSDOS mode in W98SE)

Posted on 2023-06-22, 17:42

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

i ask if exists some utility software side that can help in this cases? I mean ... like R. Loew's LIMITMEM.SYS or something else (instead removing RAM phisically)? Sure. But remember that SBEINIT apparently wants physical ram in address range 0-3fffffh. That means, the utility to reduce XMS memory …

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Re: Error loading SB16 Emu (MSDOS mode in W98SE)

Posted on 2023-06-22, 12:26

by

by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

Any other suggestion? Did you reduce your memory to 1GB ( or, even better, to 512MB or 256 MB ) ? That's important, because EMM386's paging tables are located in the first 4 MB address region 0-3fffffh and - since it's unknown how much extended memory SBEINIT needs in that region - those tables …

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Re: Error loading SB16 Emu (MSDOS mode in W98SE)

Posted on 2023-06-21, 10:55

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

Honestly, as I wrote above, I would like to enable audio without SBEMU. My non-expert question is: Why use SBEMU if I have a SoundBlaster card that should be already compatible? A small misunderstanding - I wrote "SB EMU", but meant Creative's SB16 emulation, not crazii's SBEMU. Anyway, for option …

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Re: Error loading SB16 Emu (MSDOS mode in W98SE)

Posted on 2023-06-21, 09:32

by

by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

My first doubt is, why the messages mention "SMARTDRV.EXE"? I don't have any reference of it in my config.sys or autoexec.bat That's just a guess of SBEINIT, because smartdrv was often loaded in autoexec.bat, being the first app to "consume" extended memory. The problem is that SB EMU wants …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-06-09, 09:07

by

by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

When I use mem.exe after quake for example, it shows 0K XMS free. Quake allocates all available XMS. ... with SBEMU, memory seems to stay in use, so mem.exe shows 0K free. Can anyone confirm? True. It's due to how hdpmi uses "xms memory" to backup "dpmi memory". It releases those XMS memory blocks …

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Re: SBEMU: Sound Blaster emulation on AC97

Posted on 2023-05-30, 02:42

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by Baron von Riedesel

in Marvin \ Sound

in Marvin \ Sound

Last for this damned JEMMEX i don't really know. I don't know why FDOS relies on this crappy memory managment, when there are\was QEMM or EMM386.. and i am sure or afraid (this memory thing still gives me headache and confusion at 32yo) that SBEMU works ONLY with JEMMEX or JEMM386, right? no way to …

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