Did some testing with a HP thin client 5570t, Via Nano C7 CPU at 1GHz, 2GB RAM, Via VX900 chipset, Via Unichrome9 VGA. Installed FreeDOS 1.3 (because I was unable to install MS-DOS) and replaced Jemmex 5.79 with 5.84.
Used SBEMU both beta2 and the one with the VT power fix. I did not notice any differences between the two as far as games working or not.
One peculiarity is that if I only load SBEMU (either version) without parameters, it complains of IRQ conflict. It specifically wants the /i7 parameter to work. When loaded as "SBEMU /i7" it installs itself successfully. I have not needed to specify that on any other system I tested so far.
Games that did work:
XCOM with full music+sound effects;
Frontier: Elite2 with OPL sound;
Dune with full sound;
Quake works with full sound effects;
OPL440.com (generates a 440Hz sound using OPL)
Games that did not work:
Frontier First Encounters, both the game and the setup program crash at launch;
AdLib Tracker 2 crashes;
Dune2 crashes;
Monkey Island crashes;
Most of the crashes seem to be Jemmex-related.
That's about what I had time to do today.
Also the sound volume in all of the games that worked was adequate.
I/O, I/O,
It's off to disk I go,
With a bit and a byte
And a read and a write,
I/O, I/O