I have it and configured for Windows NT 3.51/4.0. You may need for NT 3.51/NT 4.0 driver for CMD0646 chip (W2K? I don't know). It is using 430HX and old Saturn chipsets. Some new Pentium Classic not have dual CPU feature. You may need dual Pentium MMX 200.

CM-500 is combined device CM-32L (Enhanced MT-32) + SC-300 (CM model SC-55). But big one problem exist. NOISY! Because, it is simply combined. No noise reduction. It has 1-2Hz, -57dB stable noise. I won't recommend CM-500. I recommend CM-32L and SC-55 (not MkII) separate.

I’ve tried this player with SMPTE based SMF. It play too slow. (Half speed?)