Can I use a real YMF724 board by OPL3BankEditor on modern Windows(x64) ?

[110-kenichi]

Can I use a real YMF724 board by OPL3BankEditor on modern Windows(x64) ? If YES, could you please tell me the way to use it ?

[Wohlstand]

Yes, it should work if there is an OPL3-compatible interface available. First off, you need to figure the address of your sound card and then, learn the exact offset of OPL3-compatible chip. At the settings you need to set its address. Recent 64bit build of the thing should work, I added the 64bit variant of the interface driver.

[110-kenichi]

Thank you so much!!!

So... the address of my sound card is 0x40000 ? ( Please see the attached picture. ) And, Do you know how to figure out the exact offset of OPL3 chip ?

[Wohlstand]

The address should be at "りそーす"

P.S. Don't worry, I actually learn Japanese, and I understand the rest of written :fox_face:

[Wohlstand]

And, Do you know how to figure out the exact offset of OPL3 chip ?

Need to check out the specification on where the chip is located. If 0x380 offset won't work, then it should be another one (CMedia chips actually has it different). Actually it should be between one of I/O ranges at "りそーす"

[110-kenichi]

Thanks! ありがとうございます！ I need to find out the I/O address range from [Resource]... Hmm...

[110-kenichi]

I think that the FM address of my device is 388 or 398 or 3A0 or 3A8 .

So, I'd selected "Proxy to the real OPL3" for the chip type and set the hardware address value to both 388 & 398 & 3A0 & 3A8 and loaded sound samples.

However, I can't sound anything... Hmm... Any idea?

How to check inpoutx64.dll is working...

[Wohlstand]

How to check inpoutx64.dll is working...

Try to run the thing as admin for the first time (to let it register all necessary stuff).

EDIT: And ye, the 0x388 means an OFFSET relative to the sound card's address. Your address should be a sum of sound card's address and 0x388

[110-kenichi]

My sound card address is 0xf7500000 ?

And also I used the setpci command to query some I/O addresses. The result is here. Hmm...

.\setpci.exe -v -s 08:04.0 CB_LEGACY_MODE_BASE CB_IO_BASE_0 CB_IO_BASE_1 IO_BASE_UPPER16 IO_BASE 0000:08:04.0 @44 = 00041073 0000:08:04.0 @2c = 1073 0000:08:04.0 @34 = 0050 0000:08:04.0 @30 = 0000 0000:08:04.0 @1c = 00

[Wohlstand]

Looks like yes :thinking:

[110-kenichi]

Sorry, where do I input the value 0xf7500000 + 0x388 ?

I can input 4 hex digits onlyt into this dialog box...

[Wohlstand]

I could try to fix this, but, before, I want to ask some from @nukeykt what he knows about such things

[110-kenichi]

Thanks @Wohlstand -san, @nukeykt -san !

NOTE: I've checked the InpOut API. The port address type was ushort(16bit)...

void outportb(unsigned short PortAddress, unsigned short Data)

void _stdcall Out32(short PortAddress, short data)

Can we access a real OPL chip on x64/x86 windows ? I think the PCI BAR is 32bit.

It seems the InpOut driver has the following APIs.

void _stdcall DlPortWritePortUchar(USHORT port, UCHAR Value); void _stdcall DlPortWritePortUshort(USHORT port, USHORT Value); void _stdcall DlPortWritePortUlong(ULONG port, ULONG Value);

EDIT: InpOut32 driver does not support DlPortWritePortUlong ...

[110-kenichi]

Hmm. WinRing0 works on Win10(x64) to write/read data from IO ?

AutoHotKey uses WinRing0 to do that. https://www.autohotkey.com/boards/viewtopic.php?f=6&t=9009&sid=d8bb6f2585cb75aafee9a6751212d3cd&start=20

[110-kenichi]

I'll close it for now. ( I will investigation... )

[110-kenichi]

Thanks all. @Wohlstand

I could write a custom device driver for CMI8738(OPL3) for Windows11(x64) to sound OPL3. If you would like to use my driver, please grab it here. https://github.com/110-kenichi/mame/tree/master/src/CMI8738OPL3

And, I would like to support YMF724 card, too. But, it is so hard...