For DOS games you really want an ISA card. Especially older games are quite picky.

Not sure about that Earth game, I believe it's newer.

Are you running real DOS or from Windows 95/98?

I can vouch for Vortex 2 cards. The DOS drivers work very well.

Yeah that's what people keep saying but these PCI cards should work shouldn't they?
Earth 2140 is a DOS / win95 game.

I'm running it from windows 98SE. I have booted into dos and checked but I can't get it to work in that either.

Yeah that's what people keep saying

🤣 time to listen to the advice?

When you "boot into DOS" you need to install the DOS drivers.

Setting up mixed Windows / DOS machines isn't easy. But Windows could interfere with getting these DOS games to run.

DAmnit. 🤣
I used to have this exact computer all set up nice when I was a kid. It used a PCI 128 sound card then. unfortunately that computer was tossed years ago and I bought the exact same model just last month, a pc store had it ready to be scrapped in their basement.
Also the yamaha XG has such a nice sound! 🙁

My Dell Intel BX board has more or less the same card on board. True OPL and Midi is very nice 😀
The card isn't that great in pure dos as you loose midi but from within windows it should be ok?
I'm trying to remember I think I needed to install legacy drivers separately to the standard windows drivers. Almost pretty sure it added a "legacy sound card" or similar in device manager to set the resources.
I'm not home with my computers this week so cant check 🙁

Yamaha YMF-724 (DS XG) works nicely in pure DOS when you can connect the SB-Link cable to a mainboard that supports it. Most i440BX boards have the SB-Link PC/PCI header, but earlier and later boards usually come without one. Without SB-Link it can still work, but it is very temperamental.

YMF-724 still has a MPU midi interface in DOS, but one needs to connect a (external) synth to the joystick port to use it.

It really is a shame I can't get it to work right, the midi is amazing when I play it from windows. At the moment it's resting on a shelf of computer parts. 🙁