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

Posted on 2023-01-27, 22:14

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Hey, crazii. Good to see things are moving on! I'm wondering how ICH sound device works, given it's a PCI device. I may be completely wrong, but If I understand correctly there is no "DMA controller" within PCI architecture, rather every device can read from memory directly. So no need for the TSR …

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

Posted on 2023-01-27, 09:05

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Some updates: I've improved the OPL3 emulation now it is better, with little distortion. Since OPL3 emulation only involves port IO and its much simpler, the major problem is to emulate the SB. in VirtualBox, Miles Sound SETSOUND's delay method (like AIL2.0, reading some VGA ports) is not working …

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

Posted on 2023-01-27, 08:47

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Okay, I have been putting active retro hobbying off for too long. @crazii didn't you mention getting in touch through Discord recently? How do I find you there? And did you plan spending time on this stuff this weekend? Yes I'm now working on SB emulation, I think the distorted sound might be fixed …

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

Posted on 2023-01-15, 00:55

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Okay, I have been putting active retro hobbying off for too long. @crazii didn't you mention getting in touch through Discord recently? How do I find you there? And did you plan spending time on this stuff this weekend? Yes I'm now working on SB emulation, I think the distorted sound might be fixed …

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

Posted on 2023-01-13, 10:29

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

@crazii, how good is your assembly-fu? In terms of porting between assembler dialects, I mean? I never did that, but I guess maybe I can try. :D but before doing that I'm porting MPXPlay driver code from (open)watcom C to djgpp and making a C build rather than assembly. Maybe with a little bit of …

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

Posted on 2023-01-08, 11:04

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

The plan sounds very promising, crazii. A SB emulation program can be useful in many ways. Could you elaborate a little what advantages over VSB it's going to have and what output device(s) it's going to support. I don't know VSB much, it seems emulating SB for PC speaker & Covox. Basically the …

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

Posted on 2023-01-08, 10:10

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

I've looked at the VSB - Virtual Sound Blaster code, it has DMA emulation. It uses port trap to handle the DMA controller (IO port 0x0~0xF). It Also did that for the interrupt controller to virtualize IRQ. It has to enter pm/v86 to do those, or use QEMM. Emmm, interesting. I've thought about …

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

Posted on 2023-01-08, 08:19

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

I've looked at the VSB - Virtual Sound Blaster code, it has DMA emulation. It uses port trap to handle the DMA controller (IO port 0x0~0xF). It Also did that for the interrupt controller to virtualize IRQ. It has to enter pm/v86 to do those, or use QEMM. Emmm, interesting. I've thought about …

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

Posted on 2023-01-07, 15:59

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by crazii

in Marvin \ Sound

in Marvin \ Sound

Maybe we can have a live chat or audio/video call to share some ideas on how to implement an API to simplify DMA emulation, for the emulation of more complex sound cards? I'm considering writing a SB emulation program, and found you post here: https://www.vogons.org/viewtopic.php?f=9&t=73817 I took …

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Re: Yamaha YMF7x4 Guide

Posted on 2022-12-31, 01:00

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by crazii

in Marvin \ Sound

in Marvin \ Sound

After reading this thread I still couldn't find a definitive answer to this: - do 815E/EP motherboards (ICH/1/2) support DDMA if using a modified setupds with the correct PCI IDs. Or does the modified setupds only enable SB-Link / PC-PCI on the boards. I have an 815EP (Tualatin) board with YMF724, …

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Re: Yamaha YMF7x4 Guide

Posted on 2022-12-30, 03:10

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

After reading this thread I still couldn't find a definitive answer to this: - do 815E/EP motherboards (ICH/1/2) support DDMA if using a modified setupds with the correct PCI IDs. Or does the modified setupds only enable SB-Link / PC-PCI on the boards. I have an 815EP (Tualatin) board with YMF724, …

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Re: Bought these (retro) hardware today

Posted on 2022-12-29, 11:39

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by crazii

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Bought 2 sub-notenooks from a collector. Toshiba libretto 70 Pentium MMX 120MHz, 64M RAM, Yamaha OPL3 SAx DSC_0338.JPG Fujitsu FMV-biblo NCIII 13. DSC_0337.JPG It has a ESS sound card on the isa bus. I think I'm done, won't buy more notebooks, got about 10 of them. Ooh really nice, what's the …

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Re: Bought these (retro) hardware today

Posted on 2022-12-28, 23:21

by

by crazii

in Marvin \ General Old Hardware

in Marvin \ General Old Hardware

Bought 2 sub-notenooks from a collector. Toshiba libretto 70 Pentium MMX 120MHz, 64M RAM, Yamaha OPL3 SAx Filename DSC_0338.JPG File size 1.07 MiB Views 450 views Fujitsu FMV-biblo NCIII 13. Filename DSC_0337.JPG File size 1.02 MiB Views 450 views It has a ESS sound card on the isa bus. I think I'm …

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Re: DOS driver for RetroWave OPL3

Posted on 2022-12-25, 10:07

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by crazii

in Marvin \ Sound

in Marvin \ Sound

I've checked my device and the VendorID (VID) is 0483 and ProductID (PID) is 5740. However, I'm still not convinced the problem is with the Vortex86 SOM. When I plug in my KVM it allows me to type a few characters and then displays the exact same message ("Internal stack overflow, System Halted"). …

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Re: DOS driver for RetroWave OPL3

Posted on 2022-12-24, 02:59

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by crazii

in Marvin \ Sound

in Marvin \ Sound

I've talked to Sudomaker and the vendor id is as you said, but I didn't use it, the express and lite have different ids. I'll try fix the id and that will solve the device not found problem, the other error, internal stack overflow, I think it is a bug of the driver, but I didn't see it in …

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Re: DOS driver for RetroWave OPL3

Posted on 2022-12-22, 02:27

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Meanwhile I'm gonna ask Sudomaker to check the Lite's vendor id, I use vendor id to detect the device, don't know if the Lite & Express use the same vendor id.

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Re: DOS driver for RetroWave OPL3

Posted on 2022-12-22, 02:04

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Ugh ... Same problem. It reports "Retro wave device not found." and then a few seconds later "Internal stack overflow, System Halted" I'm also trying a separate power source: weeCee VCC -> N/C weeCee D- -> RW D- weeCee D+ -> RW D+ weeCee GND -> RW GND+weeCee GND PSU -> RW VCC PSU GND -> RW GND+ …

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Re: DOS driver for RetroWave OPL3

Posted on 2022-12-22, 01:58

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Ugh ... Same problem. It reports "Retro wave device not found." and then a few seconds later "Internal stack overflow, System Halted" I'm also trying a separate power source: weeCee VCC -> N/C weeCee D- -> RW D- weeCee D+ -> RW D+ weeCee GND -> RW GND+weeCee GND PSU -> RW VCC PSU GND -> RW GND+ …

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Re: DOS driver for RetroWave OPL3

Posted on 2022-12-20, 14:52

by

by crazii

in Marvin \ Sound

in Marvin \ Sound

Hmmm, it still doesn't work but I think the problem is between the Vortex86 (weeCee PC) and the RetroWave PotatoPi Lite. (ie. the RetroWave OPL3 is connected to the PotatoPi Lite) As I mentioned, when I plug the PotatoPi + OPL3 into the weeCee, the PC immediately reboots. I've tried using a USB Y- …

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Re: DOS virtual filesystem

Posted on 2022-12-18, 03:09

by

by crazii

in PC Emulation

in PC Emulation

UPDATE: I've done the USB disk driver that mounts the disk or its partition as a disk drive, it DOS drive(partition) only so FDISK cannot detect the disk with out BIOS support. Found interesting stuff here: https://stackoverflow.com/questions/45891044/any-way-to-list-the-bios-drive-numbers-in-real- …

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