How to boot dd image in QEMU?

Question

I created an image of my Debian Squeeze running on a Sheevaplug using dd if=/dev/sda of=plug_SD-karte.img (sda is the SD card plugged into another computer). Now I want to emulate the Sheevaplug. I think the best way is using QEMU. But how do I boot the image?

Some information that may be helpful: https://gist.github.com/1034314

EDIT: I would use Ubuntu 11.04 to run QEMU on.

Answer 1

as qemu supports raw disk image format, just do

qemu -hda plug_SD-karte.img -m 256