So currently, I only emulate boards with an Intel i845 northbridge, ICH2 southbridge, and a Winbond W83627HF Super I/O chip. I also only currently emulate up to Willamette Pentium 4s, though Northwood Pentium 4s shouldn't be too difficult to add anyway. Full disclosure, parts of this DID use AI assistance, mostly for debugging purposes, but this is still the first ever low level Pentium 4 emulation running real motherboard BIOSes, so, I still got it done :P

http://pcbox-emu.xyz