There was a version of Bochs floating around ages ago that was compiled for 68K Macintoshes. Unfortunately the 68K version isn't on the Boch's sourceforge site (oldest they have is a PPC version for OS 9), and "simple" Googling fails to come up with a working download link.
If you were to find it, well... by 1999 Bochs emulated a Pentium-ish PC, and 1999 is about where it seems the 68K version fell off the map. The Mac port trailed the "real" version somewhat so whether Pentium emulation ever made it in is an open question. (XP refuses to install on anything less.) MacBochs also couldn't emulate a CD-ROM drive, so installing XP would be an exercise for the reader. You *might* be able to generate a disk image using a Linux/Windows version of Bochs of similar vintage, which had fuller hardware support, and boot it on MacBochs but I don't know enough about it to state whether that would be absolutely true.
I'd hazard a guess that a Mac Quadra with Bochs would probably equal a 80386 at around 1Mhz. Judging from this silliness, I'd say you'd need about four hours to boot Windows XP to the desktop on such a thing.
If you were to find it, well... by 1999 Bochs emulated a Pentium-ish PC, and 1999 is about where it seems the 68K version fell off the map. The Mac port trailed the "real" version somewhat so whether Pentium emulation ever made it in is an open question. (XP refuses to install on anything less.) MacBochs also couldn't emulate a CD-ROM drive, so installing XP would be an exercise for the reader. You *might* be able to generate a disk image using a Linux/Windows version of Bochs of similar vintage, which had fuller hardware support, and boot it on MacBochs but I don't know enough about it to state whether that would be absolutely true.
I'd hazard a guess that a Mac Quadra with Bochs would probably equal a 80386 at around 1Mhz. Judging from this silliness, I'd say you'd need about four hours to boot Windows XP to the desktop on such a thing.