Description:

mips64emul is a MIPS machine emulator I'm developing in my spare
time. My initial goal was to write a simple simulator for running
multiprocessor experiments with a microkernel I was working on, but
the emulator can be used for many other things. While some MIPS
simulators only simulate a CPU, mips64emul also simulates other
hardware components, making it possible to use the emulator to run
unmodified operating systems such as NetBSD or OpenBSD.

One machine type that is emulated well enough to run complete
operating systems is Digital Equipment's R3000-based DECstation
5000/200. Using that emulation mode, NetBSD, OpenBSD and a few other
operating systems run similar to how they run on actual hardware, with
graphical framebuffer, ethernet, and SCSI disk and CDROM emulation.