i run windows xp with 2004 steam and supermium on it. it has onecore API and the specs are as follows:
3dfx voodoo
ball mouse with advanced grippers
640x480 monitor (its actually 1280 x 720 but i cant run half life 2 fast so i bump it down)
x86 (yes i know, i can't run x64 and my pc will stop working in 2030 something)
microsoft multimedia keyboard, i don't know the model
AMD Athlon 1000
S3 Trio64 video card
yes before you ask it runs doom and can play mario (barely)