Is Windows XP compatible with 16 bit ISA hardware?

I have access to a lot of legacy hardware, most notably 16 bit ISA sound and network cards. I'm currently converting a bunch of P2/P3 Pentium PC's (which all have 16-bit ISA slots) into XP machines. I would like to be able to use these legacy devices and save my standard PCI cards for modern computers but, it seems that these devices don't show up in my hardware manager under XP, not even under unknown devices. Are these cards compatible with XP at all? Or did XP (as a 32x operating system) drop all 16-bit support?