Got this card couple of weeks ago and I've been tinkering with it during the last week or so. It is simply stunning and finally, it is operating how it supposed to be.
I decided to install this on my Tulip P166MMX/Onboard AT24/64MB/1.7GB machine with 3dfx Voodoo 1 and which previously carried ES1869 sound card. I did a clean install of 98lite (98SE) and started to install all the required drivers for Orpheus2. Everything went pretty smoothly, but PnP forced wrong resources to the card's functions, for example IRQ11 was typical for GUS part, which isn't good for DOS and for some reason, couldn't manually set IRQ7 for it. I don't have any other addon cards installed to this computer, but it has quite a lot of built-in goodies such as USB and AMD PCNet 10MB ethernet, so there are functions that require IRQs and I/O addresses.
It was a true struggle to get the card running on the defaults (Crtystal 220, 5, 1 and Gravis 240,7,7,7,7). I have PnP/ISA settings in BIOS for IRQs, but setting BIOS to ISA just seemed to mess up things. I either got conflict error on boot, or something didn't work in Windows and resources were still a mess. I did several installs, tried to disable certain functions in Windows, tried different driver installation order, but every single time I either ended up with somehow non functioning configuration or the resources were still wrong.
I was almost giving up and deciding to use the card in one of my pure DOS 486DX2-66 machines. Today it all just somehow clicked and still quite don't know how I managed to get it working as it should. I decided to try another ISA slot, but I'm not certain if that actually did anything. But first, I disabled net and LPT/COM ports in Windows and installed Orpheus2 driver pack. Crystal part didn't go exactly like it should, but I configured it manually where it should be. After that, I installed GUS stuff and through manual configuration I managed to edit its resources as should.
After I enabled Ethrnet, it started to give troubles although it was set in automatic configuration: it didn't function and it didn't let me edit the resources manually either. Sometimes windows didn't boot to desktop and it gave protection error. In the end, I decided to let windows handle Crystal part automatically. That somehow solved everything: it still retained the resources it should have and network started to work after I removed it and let Windows find it again.
I've never before had such a difficult time with any other addon card. It was a struggle! But now Crystal and GUS works both in DOS Mode. DOS games with GUS support work in DOS window too, at least based on the few tests I made. And Windows sounds are OK too. I still need to test MPU-401 with my SC-55mkII and MT-32pi at some point, but I'm not too worried about it. I got 300, IRQ9 to it after I manually set one of the base configurations in windows (it didn't get IRQ at all in automatic and default).
In the end, it was definitely worth all the hassle, the card is amazing! Sound quality is extremely good and of course GUS sounds really good. And still there is the trusty OPL3 if needed.
Here is the card sitting in the Tulip. It is a mighty card and completely covers the Voodoo1 in a PCI slot below it:
Big thanks to an amazing team that managed to pull this off and made it an actual product! It was worth the wait and every penny!