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Qemu is a free x86 Emulator/Virtual Machine for Linux and Windows. If you are looking for something faster, you can try the Qemu Accelerator Module (Working in QEMU 0.7.1, documentation here) or VMware.

Grabbing debug messages

By default, ReactOS debug messages are sent to the serial port (COM1). For grabbing that output, you need Qemu version 0.6.1 or later, in which you can specify the -serial option.

Like this:

$ qemu -serial stdio -cdrom roslive.iso -boot d

If you are testing the setup CD, note that you can change the kernel arguments by editing the txtsetup.sif file (So things actually get written to the serial port).

ReactOS preloaded with QEMU

A preloaded QEMU image of ReactOS can be found here.

See also

External sites