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https://github.com/dgibson/SLOF, and the image currently in qemu is
built from git tag qemu-slof-20111013.
+- sgabios (the Serial Graphics Adapter option ROM) provides a means for
+ legacy x86 software to communicate with an attached serial console as
+ if a video card were attached. The master sources reside in a subversion
+ repository at http://sgabios.googlecode.com/svn/trunk. A git mirror is
+ available at git://git.qemu.org/sgabios.git.
+
- The PXE roms come from the iPXE project. Built with BANNER_TIME 0.
Sources available at http://ipxe.org. Vendor:Device ID -> ROM mapping: