Enhancing cdboot [patch for review]

[Giorgos Keramidas]

On Thu, 11 Dec 2008 08:37:26 +0200, Jonathan McKeown <jonathan+freebsd-hackers at hst.org.za> wrote:
> While you're enhancing cdboot anyway, can I ask how complicated it
> would be to make cdboot serial-console capable? (I'm not a C
> programmer, I'm a sysadmin - but I'd be prepared to try and look at
> this myself if no-one else is interested).
>
> As it stands, the only way I've found to do a serial-console CD-based
> installation is by enabling the serial console in /boot/loader.conf,
> by which time you've already missed several useful points,
> particularly the entry to BIOS settings (if you have a serial-capable
> BIOS).

cdboot runs long after the prompt for BIOS setup.  I don't think we can
modify cdboot to add serial console support to systems whose BIOS setup
doesn't support it.