Sounds interesting, would like to see how the 386sx does with the something like DOOM. Back in the day I had a 33Mhz 386sx when Doom was released, it might be my memory playing tricks on me but I seem to remember it ran it pretty well. I think that must have been with a nasty old ISA video card (looks like VESA came about with 486's).
I think I had this card in my first 486
Cirrus Logic CL-GD542, feel the POWER
