Qemu-fast
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Techniques: Emulators: qemu: qemu-fast
qemu-fast is like qemu (and is part of the same package) but runs faster by using part of the actual CPU hardware -- the Memory Management Unit (MMU) -- instead of simulating it entirely in hardware. (This technique is called "virtualizing", if I understand right.) There is some correspondence between qemu-fast and kqemu, but I haven't figured out what it is. In my testing, qemu-fast was not able to run the same Win98 image which ran well under qemu.