qemu -nographic 导致找不到“sgabios.bin"的解决办法

[Chunis Deng]

当qemu的参数为-nographic，如：
  $ qemu -nographic -hda chunix.img
时，会报如下错误：
    Could not open option rom 'sgabios.bin': No such file or directory

解释：
Serial Graphics Adapter BIOS or SGABIOS provides a means for legacy pc software to communicate with an attached serial console as if a vga card is attached.

解决办法：
$ svn checkout http://sgabios.googlecode.com/svn/trunk/ sgabios-read-only
$ cd sgabios-read-only && make
此时会生成sgabios.bin. 将之copy到/usr/share/qemu 或者 /usr/local/share/qemu 目录下即可

供参考：
https://code.google.com/p/sgabios/
http://sgabios.googlecode.com/svn/trunk/design.txt